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Moderators: IMOC Moderators, IMOC Committee Members
3sgte wrote:i always put load on new engines, In fact my engine was revved at a constant 2000 rpm the second it was firat started for 20 mins to be the cams in
,Then a short 5 mile journey to get some fuel, and then some boost to see how it loved it
Really there is nothing to run in, The bearings should be floating in oil if clearnaces are correct,and the rings as stated should be exposed to load//boost to aid the bedding in process, although if they arent bed in within 50 miles then they aren't gonna
I have had to strip down probably over 10 recently rebuilt engines due to excessive oil consuption issues.This was caused by over cautious running in and led the bores to be glazed
.they needed a hone and new rings and then a good few hours of moderate load and they have been fine since
Of course this is my opinion,and others have different opinions
dawolf wrote:I think older engines needed to be bedded in gently but it doesn't really apply to modern engines.I've always heard it's best to vary the load and keep changing gears for the first 200 miles or so.
dawolf wrote:I think older engines needed to be bedded in gently but it doesn't really apply to modern engines.I've always heard it's best to vary the load and keep changing gears for the first 200 miles or so.
Break-in period
Drive gently and avoid high speeds.
Your vehicle does not need an elaborate break-in.![]()
But following a few simple tips for the first 2000 km
(1200 miles) can add to the future economy and long life of your vehicle.
* Do not drive over 100 km/h
(62 mph).
* Run the engine at moderate speed between 2000 and 4000 rpm.
* Avoid full-throttle starts.
* Try to avoid hard stops during the first 300 km
(200 miles).
* Do not drive slowly with the manual transmission in a high gear.
* Do not drive for a long time at any single speed, either fast or slow.
* Do not tow a trailer during the first 800 km
(500 miles).
Century Motorsport wrote:3sgte wrote:i always put load on new engines, In fact my engine was revved at a constant 2000 rpm the second it was firat started for 20 mins to be the cams in
,Then a short 5 mile journey to get some fuel, and then some boost to see how it loved it
Really there is nothing to run in, The bearings should be floating in oil if clearnaces are correct,and the rings as stated should be exposed to load//boost to aid the bedding in process, although if they arent bed in within 50 miles then they aren't gonna
I have had to strip down probably over 10 recently rebuilt engines due to excessive oil consuption issues.This was caused by over cautious running in and led the bores to be glazed
.they needed a hone and new rings and then a good few hours of moderate load and they have been fine since
Of course this is my opinion,and others have different opinions
Atlast!!!! A man with the same views as me.
I run in um teen amounts of motors a year, be it a 100cc 2 stroke to a full on race engine to my own 3s motor- once the initial startup has been gone through and a high idle for around 15-20 mins checking for no leaks the next thing is get it on the road and drive it.
Load it up in 1st and 2nd but not too high revs.Dont put prolonged load on it though
- ie 4th gear flat out at 3000rpm for 2 miles.
Just short bursts of power in the early gears to get the rings seated.
If you'baby' and engine for 1000miles your not going to get the best from it and you could well end up needing a re hone and new rings.
Nathan
From 3s Forum wrote:This is a TRD issues procedure which will help you guys with thoughts on running in your fresh engines.
To ensure long life and reliability you must properly break in your freshly assembled engine.
For a high performance street motor fill the engine with a good grade 20W-50 Mineral based oil.Fill the oil filter with oil before installing it.
Remove the spark plugs and crank the engine until the oil pressure comes up on the gauge.
Re-install the spark plugs.Now you are ready to start her up.
Start the engine and bring it immediately to 2,000 rpm.
Vary the engine speed between 2,000
3,000 rpm for about 30 minutes.
After 30 minutes stop the engine, check the valve lash and re-torque the head bolts.
Drain the oil and change the filter.
Re-fill the engine with 20W-50 Mineral based oil.
Drive the car slowly for about 500 miles keeping the rpm under 4,000.Dont lug the engine either because thats worse for the motor than over revving it.
After 500 miles change the oil and filter again.
You can now use a synthetic oil if you want to.
Use a 20W-50 oil and change it every 3,000 miles.
Your engine is now broken in.
Skywalker wrote:personally when priming a car as well as removing the spark plugs I remove the EFI fuse, as Bore wash is a pain!
Skywalker wrote:Companies can say'Yes you need to run the engine in for 1000 miles, drive like a nancy'.
And it just so happends the warranty is for 1000 miles.![]()
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So when you do eventually load is up for the first time, she bellows out oil, and the bits that haven't been done probably rear their ugly heads.![]()
And oh, guess what, it's out of warranty!
I'm with 3sgte and Nath on this one![]()