Hi people iv had my buy eye sti engine rebuilt and would like to know best way to run it in and it almost done 450miles from its rebuild and iv got a knockin coming from the engine bay its not a loud knocking more when i start her up

help
phill

 

Hi Phill the knocking is not a good sign mate. Did you buy the engine or build it yourself? As a rebuild the mains and big ends should have been done so maybe piston slap??Is it centrally or left/right bank? I run mine in 500 miles on classic oil trying to stay under 3,000 revs the dump oil and run as per usual on usual grade.
Spen

 

had it rebuilt got a 12000 miels wranty on it . iv been runnin it about 3,000 to 3,500 going back at 500 for an oil change im runnin it on 5w - 30 semi semfict not sure were its coming from not to good with car engines

 

best bet mate is to take it back for its 500 now and let them look incase you develop something worse!

 

will do mate thanks

 

Bin the 5w30 semi, go for a 10w40 semi, you need it running in, not killing

Tony

 

Did the engine get forged pistons?

They seem to be noisier when cold.

 

Had it done by an engine rebuild company and it had lots done new crank new pistons etc so i hope its just a bit of noise nothink more but when i got the car it was only on 3 cylinds not 4 so had to have it rebuilt .

whats the best oil to use & want to strat moding when its runnin where is best to start

 

it wasn't SMR or ideal engines was it?

 

Run a 10w40 semi synthetic, dont go fully synth for about 5k miles as your engine will still be wearing in.

Tony

 

cant recall who it was ill check the receipt . 5k i was told 3,500 for 500 miles then just take it easy

 

I tend to run in as :

3000-3500 rpm and little / no boost for 500 miles.
Increase revs by 500 each further 100 miles, so at 700 miles can use 4500 rpm, 6000 rpm at 1000 miles and some boost .... i.e. stay in I mode.

Use mineral oil for running in for first 500 or so miles, semi synth for next 5000ish, then good fully synth there after.

I'd change oil more often then the 10,000 miles Subaru say.

 

Surely your gonna get some sort of noise from a new build as it's bedding it's self in? Of course loud bang or knocking noises are bad. But quiet noises go after a while with a forge rebuild.