carl.woolford

need help engine smokes quite badly on start up but clears quickly this is after doing a forged engine rebuild, had the engine back out to replace valve stem seal but still the same need help. as quickly loosing interesr in car as as a repairs or upgrade one thing some thing else goes wrong

Slowboy Racing

Piston Ring gap, Rings used, piston to bore clearence? Tip if oil is excesive Check the spark plug thread and tips next time before starting from cold to see if they are oily, and more importantly if so even or un even. Also check after the car has run, but not warmed enough for the smoke to clear. This may help you single out the issue to one or all the cylinders.

FWIW some forged builds just seem to burn more oil, others only on start up, and others none at all. However execess smoke on start up would suggest ring seal if everything else is in check it may just be a case of bedding in depending on whats miles you have coverd so far.

Beardy

sure it aint just norm smoke from the choke while car warms up?

White or blue ish smoke?

WMS

iTrader: (2)

Do you know what the piston to bore clearance and ring gaps are? Did you re-bore it?

carl.woolford

the smoke is white in colour. i dont know bore clearance i had it bored to fit the pistons as they were oversize, and i cant remember the ring gap, when i built it up down promax, he never mentioned ring gap clearance. Thanks for the help so far the more help the beter

Wagwann

could be your oil seals in the turbo, if the oil seals have gone then it will be putting oil into the engine, take a turbo pipe off and see if theres oil in the pipes, and check the shaft for play

Glowplug

iTrader: (8)

White smoke is normally water (blue=oil and black=fuel)

Could be just condensation sitting in the exhaust.

carl.woolford

its bluey or white not sure have to double check, there is no play in the turbo shaft

Beardy

If its white, as said. Will just be normal untill engine is warmed up. As if it was ur HG this would not go away.

Blue smoke will mean oil is getting into the cylnder usealy means rings.

After the smoke stops, give it some revs and see what comes out that rear.