Ok, ive been working on this for days, this is the best i can do, im sure someone can add to it or disagree with points, but its the best list yet.
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.
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.
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.
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& yes im blowing my own trumpet
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=D>
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, cheers Jinxy
P.S can someone Pleeeeese sticky this for everyone's sanity
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[-o<
MK1
(A) TO MK1
(B) DIFFERENCES.![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
EXTERIOR
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* Front bumper is 1 narrower on MK1a than MK1b
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* The very early MK1a front bumper is flat at the front
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& normally painted matt black.
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* Front bumper bar iron on mk1a is different than mk1b,
![](./images/smilies/spacer.gif)
*but interchangeable only if you fit the same bumper skin and foam insert
![](./images/smilies/spacer.gif)
(*Paul woods)
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* Mk1a does not have central locking from the door key, Mk1b does.
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* MK1a has smooth wing mirror housings, Mk1b has textured effect.
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* Very early Mk1a had no side skirts from new,
![](./images/smilies/spacer.gif)
*later 1a's
![](./images/smilies/spacer.gif)
(*paul woods)& MK1b did.
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* Mk1a had black moulded door
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& panel protector strips, Mk1b have colour
coded clear plastic strips.
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* MK1a cars had front mud flaps as well as rear flaps, MK1b only had rear flaps
![](./images/smilies/spacer.gif)
* very early MK1a had black unpainted plastic rear sill protectors.
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* Mk1a bonnet different from
![](./images/smilies/spacer.gif)
mk1b
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& not interchangeable
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("yes they can"
![](./images/smilies/spacer.gif)
- Paul woods).
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* Very early Mk1a had black caps on wheel nuts.
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* MK1a has metal
![](./images/smilies/spacer.gif)
(some plastic
![](./images/smilies/spacer.gif)
*P.W.
![](./images/smilies/spacer.gif)
) lower front spoiler, mk1b is plastic.
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Also MK1a has different front panels.
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* Mk1a had
![](./images/smilies/spacer.gif)
triangle alloys, Mk1b has
![](./images/smilies/spacer.gif)
teardrop alloys.
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MK1a 5.5J
![](./images/smilies/spacer.gif)
& MK1b 6J
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, so MK1b are slightly wider.
![](./images/smilies/spacer.gif)
( cheers MartG)
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* Mk1a engine cooling grille is metal
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& was split into two sections, MK1b was plastic
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& single entry type which protruded further outwards from the body.
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* MK1a had roof mounted manual aerial, MK1b had electric aerial mounted on the rear o/s wing.
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* MK1a only had sunroof
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& tintop options, Mk1b had T-bar, Sunroof
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& tintop options.
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* Very early MK1a sunroofs have no dot pattern in the blackout paint.
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MK1bs do.
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INTERIOR
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* MK1a had two tone seats, Mk1b are single coloured.
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* Mk1a interiors
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( excluding seats, headlinings
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& sunroof cover
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) were all black.
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* MK1a original radio very basic compared to MK1b.
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* Inner door handle backing plates on MK1a different thickness to MK1b
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& not interchangable between the two.
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* MK1a wiper
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/ headlight switches are more squarer than the MK1b's rounded type.
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* MK1a has no glove box key lock, Mk1b does.
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* Mk1a headlights dont rise on the first switch position, they dont have dim/dip, so its side lights only.
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Mk1b lights do rise on the first position
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& operate in dim
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/ dip mode with side lights.
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* MK1a has sub woofer under drivers seat, MK1b didnt have this.
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Some JDM spec later models do have sub
![](./images/smilies/spacer.gif)
(P.W.
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)
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* Between seat cubby box has lid support on MK1b only, not on MK1a.
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* MK1a had only one behind the seat coat hook, MK1b had two.
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* MK1a inner door cards are different than on MK1b, switches sit in a semi-circular pod, although the switches are interchangeable.
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* The air vents at either end of the dash on a MK1a have silver center knobs, MK1b had black only.
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* Radio surround on MK1a is different to MK1b
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& incorporated a small light.
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* Centre arm rest on a MK1a incorporates a padded arm rest, MK1b doesnt.
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* On a MK1a the ashtray is located forward of the gearstick, on a MK1b its to the side of the centre console.
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* Heater controls on a MK1a are basic design with levers
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& knobs for air flow etc, on a MK1b they are push buttons with green L.E.Ds
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& motorised direction flaps.
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* The Mk1a heater control panel incorporates the cigarette lighter, on a MK1b this is housed under the ashtray flap
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& the cigarette elements are not interchangeable.
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* Lights up warning buzzer found on MK1b only
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& only on
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F
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&
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G regs
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.
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* Dash speedo lights on MK1b
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'F'
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&
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'G' reg ONLY had dimmer switch fitted.
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* MK1a boot trim is different shape to MK1b
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& not interchangeable.
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* MK1a boot has fibre board covers over the inner wing area behind the o/s/
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& n/s boot panels.
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( cheers Kev
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)
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* Mk1a has no radiator cover trim( rubber gasket stuck on underside of bonnet instead
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), MK1b does.
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*to be confirmed
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- mk1a may have had a cover but different
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* MK1a coolant filling procedure warning sticker on the engine lid is yellow, on a MK1b its blue
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& white.
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* Tyre pressure information sticker on the bottom of the drivers door on a MK1a is different to MK1b.
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* MK1a dash gauges have larger increments than MK1b.
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* MK1a had no rear speakers, MK1b did.
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* MK1a steering wheels had exposed metal supports, MK1bs were covered.
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* MK1a steering wheel 2.5cm larger than MK1b
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( cheers MartG)
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* MK1a had black front strut top caps, MK1bs didnt.
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* MK1b T-tops ONLY
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had front strut brace fitted as standard.
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MECHANICAL
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* ECU is NOT interchangeable from MK1a to MK1b
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* MK1as ECU is more aggressive for fueling than MK1b.
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* MK1a weighs less than MK1b.
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( cheers Kev
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)
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* MK1a has different radiator brackets to MK1b.
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( cheers Kev
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)
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* Mk1a has two mounting bolts on the brake master cylinder, MK1b has three bolts.
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( cheers Kev
![](./images/smilies/spacer.gif)
)
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(or: mk1a 4 bolts, mk1b2
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- to be confirmed
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- P.woods)
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* Air filter on a MK1a is in the engine bay, on a MK1b its in the boot behind the n/s boot panel.
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* MK1a drop links are different length to MK1b.
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* Brake discs are smaller on a MK1a than MK1b, but calipers are same size
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& interchangeable 9just the piston bit of the calliper
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- the support bracket is different
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- P.W)
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* Cam covers have
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16 VALVE in blue on a MK1a, on a MK1b this is in red.
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* MAP sensor on a MK1a is square, on a MK1b this is rectangular
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& NOT interchangeable between the two models.
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* Rear suspension subframe is different between a MK1a
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& MK1b.
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* MK1a
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have single jet injectors, MK1b have twin jet, higher flowing injectors
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& are interchanglable providing the engine bay loom is changed between the two models.
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* MK1a TVIS comes in at a lower RPM than MK1b.
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* The air intake temp sensor on a MK1a is on the TVIS manifold
![](./images/smilies/spacer.gif)
( after throttle body
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), on a MK1b its on the intake pipe
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( before throttle body
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)
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* Mk1a have a VTV dashpot under the throttle body acting on the throttle stop, MK1bs dont have this.
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* MK1a has smaller clutch
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(200mm) MK1b has larger clutch
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(212mm)
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* MK1a has smaller diameter rear anti roll bar than the MK1b.
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* MK1a has C50 gearbox, MK1b has C52 gearbox.
![](./images/smilies/spacer.gif)
* Rear track rod control joints are different on a MK1a than Mk1b
![](./images/smilies/spacer.gif)
* Struts are different on MK1a than MK1b
![](./images/smilies/spacer.gif)
& are not interchangeable without cutting studs
![](./images/smilies/spacer.gif)
& drilling holes.
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* MK1a and MK1b drive shafts are different, having different ends at the hub and not interchangeable.
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above list edit: 14/04/07
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- updates
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![](./images/smilies/spacer.gif)
MR2 MK1 Wheels, Tyres, etc ![](./images/smilies/spacer.gif)
Standard Wheels ![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
Rim size: 14
![](./images/smilies/spacer.gif)
PCD: 4x100
![](./images/smilies/spacer.gif)
Offset: 35
![](./images/smilies/spacer.gif)
-> 38
![](./images/smilies/spacer.gif)
Centre bore: 54.1
![](./images/smilies/spacer.gif)
Standard tyres: 185/60/14
![](./images/smilies/spacer.gif)
Standard Tyre pressures:
![](./images/smilies/spacer.gif)
Cold Tyre Inflation Pressure
![](./images/smilies/spacer.gif)
1.8
![](./images/smilies/spacer.gif)
/ 26 FRONT 2.0
![](./images/smilies/spacer.gif)
/ 28 REAR
![](./images/smilies/spacer.gif)
MK1a had
![](./images/smilies/spacer.gif)
triangle alloys as standard
![](./images/smilies/spacer.gif)
MK1b had
![](./images/smilies/spacer.gif)
pepperpot alloys as standard
Larger Wheels
that will fit on a MR2 MK1: ![](./images/smilies/spacer.gif)
![](./images/smilies/spacer.gif)
Alloys up to 17" have been fitted, but all changes will affect handling
![](./images/smilies/spacer.gif)
Larger alloys must have the offset within the standard alloy range in order to fit.
![](./images/smilies/spacer.gif)
Spacers can be used to help achieve correct offset.
![](./images/smilies/spacer.gif)
tyre size calculator:
http://www.willtheyfit.com/
Geometry Settings
![](./images/smilies/spacer.gif)
TRD setup:
![](./images/smilies/spacer.gif)
toe-in:
![](./images/smilies/spacer.gif)
ft=1.6mm
![](./images/smilies/spacer.gif)
(stock=1mm)
![](./images/smilies/spacer.gif)
rr=3.2mm
![](./images/smilies/spacer.gif)
(stock=4-5mm)
![](./images/smilies/spacer.gif)
castor
![](./images/smilies/spacer.gif)
= 6 deg
![](./images/smilies/spacer.gif)
(don't worry about this too much though
![](./images/smilies/spacer.gif)
)
![](./images/smilies/spacer.gif)
camber
![](./images/smilies/spacer.gif)
ft= 1mm neg
![](./images/smilies/spacer.gif)
(stock zero)
![](./images/smilies/spacer.gif)
rr= 1.5 neg
![](./images/smilies/spacer.gif)
(stock 1 deg)
Polybush replacement
- suggested replacement bolts needed:
![](./images/smilies/spacer.gif)
part numbers, number of bolts in brackets
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FRONT
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48068 A
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
90179
![](./images/smilies/spacer.gif)
- 12025
![](./images/smilies/spacer.gif)
(4)
![](./images/smilies/spacer.gif)
90170
![](./images/smilies/spacer.gif)
- 16183
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
94512
![](./images/smilies/spacer.gif)
- 01600
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
91611
![](./images/smilies/spacer.gif)
- 60825
![](./images/smilies/spacer.gif)
(4)
![](./images/smilies/spacer.gif)
90119
![](./images/smilies/spacer.gif)
- 10247
![](./images/smilies/spacer.gif)
(4)
![](./images/smilies/spacer.gif)
REAR
![](./images/smilies/spacer.gif)
48780 B
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
48780 C
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
90179
![](./images/smilies/spacer.gif)
- 16001
![](./images/smilies/spacer.gif)
(2)
![](./images/smilies/spacer.gif)
48703 E
![](./images/smilies/spacer.gif)
(4)
Paint Codes
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see:
http://www.toyotareference.com/#MR