yerRx7

so after dropping in another motor into my fc. she burns out white smoke. now i know that white smoke means you're burning coolant, but are there other ways of coolant leaks besides the coolant seals for my fc to be caughing out white smoke? i've checked my oil and have not seen any coolant what so ever in my oil. compression test still comes out in the 96+ front and rear.

RotaryRocket88

iTrader: (7)

With the engine cold, start it up and remove the radiator cap. Look for bubbles in the coolant. Does the engine overheat, or do you have excess amounts of coolant going into the overflow tank?

yerRx7

she doesn't over heat nor does coolant go into the overflow tank. but tmr i will start the car up and see is the fluid bubbles. are you thinking that the thermal stat is bad?

duo2999

iTrader: (1)

uhh possibly the throttle body? i know coolant runs through that. kind of a longshot but its possible.

dawicka2

The Turbo is another possibility.

Coolant runs through that...... and check those little o ring seals at the manifold.

john ny

Jimmy2222

iTrader: (3)

Try to get a smell of it.

yerRx7

sorry i forgot to tell you guys. its a 90 gxl. everything is pretty much stock.

RotaryRocket88 the coolant doesn't boil when it starts.

duo2999 which hose would run coolant through the trottle body?

Jimmy2222 fumes smell like charcoal to compare. lol

also the car's ignition timing is off. im not sure if that has anything to do with it.

RotaryRocket88

iTrader: (7)

First things first, set the timing.

The bubble test is to see if one of the coolant seals is shot & allowing gases from the combustion chamber to enter the system. The thermostat is irrelevant in this case.

If there's not an external coolant leak from one of the hoses, that is dripping onto the hot exhaust manifold, then there's a chance it's actually oil burning. Worn oil control rings will allow small amounts of oil to burn off, which will cause a gray/white smoke. Is this a used engine, or a rebuild that you put in?

yerRx7

yeah when i have time i'll set the timing on her. i've only lined up the flywheel with the inspection plate(becuase the yellow indicator isnt on the pulley) and matched the CAS. im trying to get my idle down to 750 or so, so i can time the ignition, but cant seem to get the idle any lower than 1k. im going to reajust the flywheel one more time just to make sure i got it right.

i do have a small coolant leak on the radiator but that's only on the radiator. i will double check though around the manifold to see if there are any leaks around there.

the engine is a used one from a 91 auto with 97k miles on it.

NA87FC

mine does both. i was told it could be a bad coolant seal.

yerRx7

time for a rebuild?? O_o well im going to be busy the entire weekend and wont have time to fix my fc. i'll probably post resaults on sunday or something.

yerRx7

is there a way to check and see if i do have bad oil control ring/s without tearing down the engine?

kenshinhimura

iTrader: (1)

think one way to check is after warming up car, rev past 6k for about 10 seconds or more and see if it starts smoking.