hey guys
got my 4age rebuilt and i ve asked a few people about the best way to wear it in but i don't know what to do
my mechanic said i should thrash it otherwise the the rings will glaze the bore
but yeah if some one can tell me the best way it would be appreciated
and also how long you need to wear your motor in and any other useful info
cheers
Thrash it? freak who's your mechanic? stay away from him!
just drive it normal, keep it below 4000rpm make sure you vary the RPM when your cruzing, keeping the motor at a constant RPM will glaze up your bore's.
So give it a hit every now and then, up to 5500 - 6000 RPM.. load it up as well but not for to long.
try and put it thru as many different load combinations as you can i would say is the best..
<div class='quotetop'>QUOTE (SNAP @ Jul 30 2008, 06:37 PM) </div>my mecahnic is a performance autos in nerang he did a good job on the motor but i thought he was wrong about thrashing it
well I'm ganna take it for a morning drive tomorrow so yeah thanks for the info
get someone to run it in on the dyno. its alot easier and you know its going to be done right :2thumbs:
What's the first thing that comes up on google when you type in engine break in?
Enjoy!
i was always taught to keep it at high revs in the lower gears for high revving motors and lower revs in higher gears for low revving torque monsters.
i.e 4 cyl - 1,2,3 gears at highish rpm with small amounts of idle and low rpm driving
8 cyl - 3,4,5 gears at low rpm with small busrts of high rpm in lower gears
Drive along in 5th gear an accelerate from 60 to 90 repeatedly.
Never let it idle for long
Don't let the revs sit in one place.
My AE86 race, street, drift build.
http://www.ae86drivingclub.com.au/fo...ead.php?t=4156
With Super Thanks to AJPS for all your AE86 and BBQ needs.
my mate rebuilds his own v8's in his track car and his son is a mechanic. they both say drive the engine how it will be used for the rest of its running life from that rebuild.
so if youre going to thrash it for its whole life, thrash it straight away. if youre gonna baby it for its whole life baby it straight away.
<div class='quotetop'>QUOTE (Ken @ Jul 30 2008, 07:09 PM) </div>Thanks for the article ken it was a good read
<div class='quotetop'>QUOTE (riojin @ Jul 30 2008, 07:28 PM) </div>hey riojin u have a point there most of what u said was in that article ken posted up
Regardless of the rev range of the motor, lug it, load it up. This pushes the rings against the bore more than revs will. Don't rev it too hard, don't use full throttle for the first tank of fuel.
This info is fresh from the yamaha yz250f manual, and they are a high revs full race spec motor (13,500rpm, 12.5:1 comp etc).
Baby it and you'll be topping up oil forever, but don't go crazy on it and use mineral oil.
EDIT: I just read that site in the link and scrolled down to the picture of the two pistons. Sorry, gonna have to call BS on that pic. The one they claim to have run in by their style doesn't appear to have any discolouring, EVEN ON THE CROWN!!!
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