new3466scooby

for about 2 minutes, when its warm no noise at all, lazy oil pick up or the dreaded big ends my97

Kevin Groat

Pretty good chance it's piston slap if it's my97 - do a search, it's been discussed lots of times.

TonyBurns

iTrader: (3)

Sounds right to me, what oil are you using?

Tony

new3466scooby

no sure whats in it, only bought it last week

TonyBurns

iTrader: (3)

If the oil is too thin you will get a knocking noise, but what sort of mileage does this car have on the clock? normally (but not always) piston slap shows its head early (less than 30k) rather than later.

Tony

new3466scooby

its on 92k now, but ive just done 1000 miles this week. oil is clean to. i let it tick over for a minute once im at the end of my road noise is gone totally

Cosworth427

Winter weather = noisy engines when cold.

If the noise only changes in speed, but doesn't get louder from more throttle, it's most likely the valve lifters. (Nothing to worry about). If it gets louder from more throttle, it could be piston slap or worst case scenario, mild rod knock.

new3466scooby

no it don,t get louder from more throttle, stay,s the same tone,