[Mk2] [Turbo] using st205 head and hks 264 cams is there a belt tooth issue?

[planted1]

hey all,
I'm using a rev 2 block with st205 head and hks 264 cams,
the belt,semi fitted at the moment is for a rev 2,
am i looking at an issue on the amount of belt teeth
or will the existing belt be fine?
I ask as i see various revision belts listed,

thanks
steve

[GTS GAV]

i had this problem buddy, i had a rev3 head on a rev2 block, as i think the rev2 is known as a longblock and rev3 is the short?? there is a slight diffrence in the belts when i say slight i mean one tooth, i am unable to tell you exsactly wich revision belt to use as i bought two brand new hks belts, an just see wich one had the best fit in doing so i forgot to mark wich one was wich and got them muddled up im pritty sure it was the rev3 belt as this is the one that is smaller. i have a spare brand new toyota rev3 belt and a hks belt if you nead to borrow one to test etc

[planted1]

hi gav,
thanks for the info,confirms what i was worried about really.
Great offer from you as well,which i much appreciate,
dont fancy selling either of them do you?

steve

[greeny]

i had this problem buddy, i had a rev3 head on a rev2 block, as the rev2 is known as a longblock and rev3 the short there is a slight diffrence in the belts when i say slight i mean one tooth, i am unable to tell you exsactly wich revision belt to use as i bought two brand new hks belts, an just see wich one had the best fit in doing so i forgot to mark wich one was wich and got them muddled up im pritty sure it was the rev3 belt as this is the one that is smaller. i have a spare brand new toyota rev3 belt and a hks belt if you nead to borrow one to test etc

Gav,

A short block= block downwards,

A long bock = a full engine.. block and head.

If your using the ST205 pulleys, i believe you need to use the rev3 belt.

Check by counting how many teeth the cam pulleys have and the crank pulley, the crank shoud have half the teeth of the cam pulleys

[planted1]

Hi greeny,
sorry my mistake i should have also said that i am using hks pulleys as well as hks cams,
will what you said still hold true for the hks pulleys?
thanks
steve

[Gary ST165]

hey all,
I'm using a rev 2 block with st205 head and hks 264 cams,
the belt,semi fitted at the moment is for a rev 2,
am i looking at an issue on the amount of belt teeth
or will the existing belt be fine?
I ask as i see various revision belts listed,

thanks
steve

my understanding is to use a rev1/rev2/st185 belt...


there is no issue with the cam pulleys: rev1/rev2/rev3/st185/st205/ HKS etc same diameter and number of teeth through the years.
belt tension issues arise when using a different oil pump / oil pump pulley.


# rev1/2 timing belt has 178 tooth belt matched to 27 tooth rev1 /rev2/ st185 oil pump pulley.

# rev3/4 (st205) timing belt has 1 tooth less on belt (177), to co-inside with the smaller faster driven 25 tooth rev3 / st205 oil pump pulley



hth

[greeny]

hey all,
I'm using a rev 2 block with st205 head and hks 264 cams,
the belt,semi fitted at the moment is for a rev 2,
am i looking at an issue on the amount of belt teeth
or will the existing belt be fine?
I ask as i see various revision belts listed,

thanks
steve

my understanding is to use a rev1/rev2/st185 belt...


there is no issue with the cam pulleys: rev1/rev2/rev3/st185/st205/ HKS etc same diameter and number of teeth through the years.
belt tension issues arise when using a different oil pump / oil pump pulley.


# rev1/2 timing belt has 178 tooth belt matched to 27 tooth rev1 /rev2/ st185 oil pump pulley.

# rev3/4 (st205) timing belt has 1 tooth less on belt (177), to co-inside with the smaller faster driven 25 tooth rev3 / st205 oil pump pulley



hth

Yep

Sorry steve, Gary's right. I was half asleep when replying earlier!

Ive had crank pulleys on the mind since ive been playing with various OEM crank pulley timing rings/sensors

I run the rev3 belt with rev1 head and block and using the 5sfe oil pump.

So if your using the rev1/2 oil pump then use the same rev 1/2 belt.

[planted1]

Thanks guys ,
so easy to get confused on this,
i'm ok with my rev 1/2 belt as i have a new rev1/2 oil pump fitted,
thanks again for all your help

steve

[GTS GAV]

i had this problem buddy, i had a rev3 head on a rev2 block, as the rev2 is known as a longblock and rev3 the short there is a slight diffrence in the belts when i say slight i mean one tooth, i am unable to tell you exsactly wich revision belt to use as i bought two brand new hks belts, an just see wich one had the best fit in doing so i forgot to mark wich one was wich and got them muddled up im pritty sure it was the rev3 belt as this is the one that is smaller. i have a spare brand new toyota rev3 belt and a hks belt if you nead to borrow one to test etc

Gav,

A short block= block downwards,

A long bock = a full engine.. block and head.

If your using the ST205 pulleys, i believe you need to use the rev3 belt.

Check by counting how many teeth the cam pulleys have and the crank pulley, the crank shoud have half the teeth of the cam pulleys

i always thort it was rev2 long and rev3 short

[greeny]

i had this problem buddy, i had a rev3 head on a rev2 block, as the rev2 is known as a longblock and rev3 the short there is a slight diffrence in the belts when i say slight i mean one tooth, i am unable to tell you exsactly wich revision belt to use as i bought two brand new hks belts, an just see wich one had the best fit in doing so i forgot to mark wich one was wich and got them muddled up im pritty sure it was the rev3 belt as this is the one that is smaller. i have a spare brand new toyota rev3 belt and a hks belt if you nead to borrow one to test etc

Gav,

A short block= block downwards,

A long bock = a full engine.. block and head.

If your using the ST205 pulleys, i believe you need to use the rev3 belt.

Check by counting how many teeth the cam pulleys have and the crank pulley, the crank shoud have half the teeth of the cam pulleys

i always thort it was rev2 long and rev3 short

As far as i understand a short block is block/crank/pistons/sump etc (everything from the block top down)

And a long block is touted as a full engine, I.e as above + head?

[GTS GAV]

so why are there ebay ads, with forged build rev2 long block, and rev3 short block for sale, when they are complete engines?, i think the term block, actualy means just the block i may be wrong, irl check tamuro dude

[Gary ST165]

Short block assembly:




Partial engine assembly:




hth

[RyanRs]

If you went into an engine builders and asked for a Shortblock, you would get a built bottom end -crank,bearings,pistons,rods -built into a prepared block. If you ask for a longblock you get the same but with an assembled head bolted to the top of it.

No ancillaries.

Im not 100% sure on the tooth issue with the cam belt when using a rev2/3 combination however iirc the rev2 has a slightly larger oil pump pulley and therefore has a slightly longer cam belt to suit.

[GTS GAV]

i see i get what you mean just assumed as the engines were fully built in ebay adds one called along the 2 called short i assumed it ment just the block, they seem to use this fraise in the u.s alot i thort they were reffering to revision or somthing, you learn something new every day

[planted1]

I am so glad i asked this question,
i thought i would double check,just to be on the safe side.

My belt has 178 teeth,and my oil pump......25 teeth
so a rev one timing belt and rev 3 oil pump

I'll be buying a rev 3 belt with 177 teeth then,

Thanks to all for putting me right on this

steve

[Gary ST165]

have you got a rev 3 sump, or just a smaller oil pump pulley?

[planted1]

TBH i dont think it matters gary,
its a rev 1/2 sump modded for arp rod bolts,
but the oil pump with pressed pulley is located on the block upper left of the crank pulley.

steve

[planted1]

I think this is the one i am looking for,
its an HKS one,to fit st202 and st205
MR2 SW20 3S-G(T)E 93/11～99/10
177Y25.4 (teeth and width)
Toyota p/n-13568-79105
HKS p/n-24999-AT006
http://www.hkseurope.com/engine/apps/belt.htm

[Gary ST165]

TBH i dont think it matters gary,
its a rev 1/2 sump modded for arp rod bolts,
but the oil pump with pressed pulley is located on the block upper left of the crank pulley.

steve

Coolio. If that is the case then you are probably running a 5sfe pump or 5sfe oil pump pulley

>> as rev 3 oil pump won't fit the rev 1 /2 sump pan / oil pick up

[planted1]

lol it all becomes clear
thx bud

steve