Ive been trying to find an exhuast leak forever now. It sound like its coming right out of the back smog tube hole on top of the exhuast manifold. I have a new manifold,new gasket torque to spec properly, new smog tube gaskets,new flange donut gaskets. Anyone know what it might be? Its a very small yet very annoying leak. HELP!!!

 

Anyone know how to seal a manifold gasket if the head is slighty warped?

 

you could have it surfaced or break out the silicone for a quick fix that may or may not last long

 

Try putting a small amount of seafoam or ATF in the carburetor when it is running (like you are trying to break off some carbon) to make the exhaust smoke and see where the smoke comes from. I have an exhaust leak and when I did a Seafoam treatment it made the leaks really obvious.

 

i know where it is coming from now, just need to figure out how to get it sealed up. if anyone knows of any silicone type stuff that would work let me know.

 

You can buy exhaust cement for sealing up holes and things like that, it would probably work well to seal the manifold gasket. I do not think that any silicone could hold up with the high temperatures of the exhaust. Fireplace cement might also work.

 

header and be done with it

 

I've had good luck with Permatex red gasket sealer on exhaust. That and the Ultra Copper Permatex works well on my big block Ford exhaust manifolds. However, silicone isn't a fix for a warped manifold. You'll have to have it machined to correct the warpage. You could try using an exaust manifold gasket and putting Permatex on both sides of the gasket before installing.

 

well i just had my head service when it was off which makes me mad that they didnt check it so im not pulling my head off. the leak is really small so im thinking some type of sealer would fix the problem. what gasket do u guys recommend? ive been trying car quest. i heard felpro is good

 

http://www.remflex.com/

 

sweet... thanks. Im ordering one right now. ill let you guys know how it turns out!!

 

what pattern do u guys torque your manifold with(see picture!!dont laugh at it). also how many sequence do u guys do untill you hit the 33 pounds it calls for?

 

i used a criss cross type pattren and just got them tight then about a half turn never leaked on me

 

ITS A MIRACLE!!!!! The number 4 spark plug had blow by so i replaced the plug and it fixed it. On top of that i almost thought i stripped out the holes when i went to tighten the new plug down. DONT EVER RUN AUTOLITE PLUGS IN UR TOYOTA. NGK RULES!!! thanks for all your help and the gasket from, remflex is awsome!! even if u dont have any warped manifold they seem liek they will last a long time.