al3x

I have just bought an Impreza (1994 wrx) that has had a rebuild, crank, pistons, head gaskets, big end bearings etc. I was wondering how long I should run it in for, I have been told conflicting things, max 3000rpm for 500 miles, or 4000rpm for 500 miles. Then take it to have the head bolts checked, and just looked over.
Thanks for any help,
Alex.

TonyBurns

iTrader: (3)

4000rpm sounds right, but id do it for 1k rather than just 500miles if the car has had a full rebuild.

Tony

al3x

It had....

Head gasket set
Head bolts
piston rings
head skim
oil filter
engine oil
turbo pipe
re grind crank
main bearing
big end bearing
plugs
pistons
clutch
cam belt

Stiver3

i might see you around mate im in the chelms area aswell

highlander68k

Has any body got any opinions on the method of running in?

I've always found good results from ensuring that I don't keep the revs static i.e. doing 50 miles at a constant 3000rpm without fluctuating the rpm. If I'm on a long journey, I would go from 2000-3000rpm (first 250 miles) then the following 750 (ish) miles varying between 2000-4000 rpm. It just means slowing down and (gradually) speeding up on Motorways.

This method seems to hold up quite well and always gave me decent results (compared to friends) when running in the two-stroke bikes.

banny sti

iTrader: (68)

what i did when running in was change the oil after a 100 miles, then again after 200, then again after another 200 then one final oil change after 500 miles. for the first 500 miles didnt go above 3000rpm and last 500 miles went to 4000rpm. no motorway driving at all. hope this helps