smoking problem...AGAIN!

[Stangtamer]

hey guys! i recently pulled my 331 stroker bottom end out because of ring issues...i was running so dang rich with two bent exhaust valves, so that explains why that bottom end smoked...i put my stock bottom end back in with all my aftermarket goodies on top...it still freaking smokes! i didn't have problem with it at all when it came out...it sat for like 7 months, but i lubed up the cylinder walls and primed the oil pump for a few minutes...i thought i was alright...at idle, it smokes white...theres no chocolate milk in the oil and no oil in the antifreeze so i know its not that...when you rev it, it smokes blue...that makes me think rings...i was told that bad rings smoke white from a trusted source...what do you guys think? is there anything i can do to reduce this? any suggestions would be great...thanks!

-jeremy

 

[Michael Yount]

Gray/Black smoke is from the engine running too rich (the blacker the richer); blue smoke is burning oil from bad rings, bad valve seals and/or guides; white 'smoke' usually isn't smoke at all - it's water vapor (steam) and usually occurs when engine coolant is somehow getting into the combustion chamber (bad head gasket, leaking intake gaskets, leaking egr spacer, leaking front cover/water pump).

Sounds like you need to run cranking compression and leak down tests to determine what kind of shape your cylinder seal is in; Also pressure test the cooling system to see if it's leaking anywhere.

 

[Stangtamer]

thanks man, that helps...i know its not rich cause i had it tuned and leaned out...i did a compression test and all cylinders are around 120-130 each...if a little coolant is leaking in the combustion chamber, where should i look first? the heads?

 

[importsmokinGT]

you didn't line all the gaps up on the rings did you?

 

[vristang]

What are you using for crank case ventilation?

Did you change the setup from stock when you put the stroker in? Did you continue to use the modified ventilation system when you put the stock short block back in? This would be a common modification that could explain your symptoms.

There is a build up of pressure in the crankcase even if there is very little blowby. The pressure comes from the movement of the pistons and inability of the crankcase air to move around the crankcase as fast as the pistons are moving.

Other than that try pulling codes.

Hope this helps.