Hondapreludeg

I have a civic with a 1.5Liter 16 valve motor and just did a head gasket and there is still white smoke. It is fine when cold but when the motor heats up it starts smoking. It is cylinder 1 because i pulled the plugs and it was wet with antifreeze.so i did a compresion test and it was good.
cylinder 1 176psi
cylinder 2 176psi
cylinder 3 174psi
cylinder 4 172psi

there is no oil and antifreeze mixing either.

what can i check next and how?
thanks guys!~

deadline

did u resurfaced the block and head..so everything would be smooth to put back in ?

90dteg

Do you replace the head bolts? Honda issued new head bolts and new style head gasket for those motors. The head bolts are a stretch bolt, so when they get torqued down they can not be reused. The new head gasket is a mls gasket instead of the factory composite.

Hondapreludeg

head was machined and new bolts~

Hondapreludeg

if the compression test is good doesnt that mean it either is a crack in the head somewere or it is something with the intake?~~

slowcivic2k

Your compression numbers are good so I would begin to suspect a crack prior to air/fuel induction. Remove your intake manifold and see if there is coolant in that port.

HCivicSi23

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by slowcivic2k &raquo;</TD></TR><TR><TD CLASS="quote">Your compression numbers are good so I would begin to suspect a crack prior to air/fuel induction. Remove your intake manifold and see if there is coolant in that port.</TD></TR></TABLE>

I agree. Check the intake manifold gasket and replace it. I bet thats where you find your problem. And by cylinder 1, you are talking about the cylinder thats closest to your timing belt?

Hondapreludeg

It has a new intake gasket on it already.but i will pull the intake to see if there is antifreeze in the port for cylinder one which is next to the cam gear

Hondapreludeg

is there anyway to check if the head has a small crack with out taking it off such as some sort of pressure testing?

slowcivic2k

In order of said scenario to work, it would have to be a crack in the head on that one intake port, which is a very small area for it to rupture and leak like that. I'm kinda lost with it right now, for coolant to be doing that and compression to be good, that sounds like a problem the machine shop SHOULD have found during their inspection. It doesn't make any sense any other way, there is no coolant in the port of that manifold, and the water jacket on that side of the head is the only real suspect I can possibly think of right now.

Hondapreludeg

so you think there is a crack in the water jacket on the head which is dumping antifreeze in the cylinder? Is there any way to rule out a problem with the block or sleeves?

slowcivic2k

Well since your compression numbers are consistent, I would not see any problem with the sleeves or block, Only way to tell for sure is with an inspection, requiring removal of the head.

1d10t

did you check the deck for flatness? could be a cracked sleeve. cant be IM or itd be no4, or all of them saturated. does the coolant system fill up with air? compression test may not tell a cracked sleeve. if the crack were near the bottom, comp test wouldnt show it. honda head bolts are NOT torque to yield.

Hondapreludeg

someone at the machine shop were they do head work said to take the cam out to close off the valves, then to take the radiator cap off and put air down cylinder one to see if the antifreeze bubbles this he said will tell you if there is a problem in the head what do you think?

Hondapreludeg

i am testing it today and seeing what i find out thanks guys!

Hondapreludeg

Well i was getting the motor to normal operating temp to do some tests and no more smoke! I ran it for over an hour and it still looks good. So maybee antifreeze got into the system somewere it shouldnt have been and in the exhaust when the gasket was blown. I have driven the car 30o miles no prob thanks for the info guys!