Bad seal at Exhaust Manifold gasket
Posted: Mon Aug 24, 2015 6:53 am
After doing a head gasket replacement, I cannot get my exhaust manifold gaskets to seal properly, causing P0134 and p0154 oxygen sensor codes.
I have replaced the driver's side gasket FOUR times, and it sounds good at first, but after the engine warms up, I can hear a gas leak. I've used Fel-Pro perforated style gaskets as well as multi-layer aluminum gaskets.
This weekend I went as far as replacing the entire exhaust manifold on the driver's side, new gasket, bolts torqued to spec, and got the biggest leak yet. So after the engine was warm I re-torqued, which made an improvement but not a perfect seal. And in fact, I felt one of the bolts start to strip, probably from inside the cylinder head.
I'm running out of ideas. Is my last option to use bigger bolts and re-tap the holes? Is there any way to ensure a better seal with the gaskets?
I have replaced the driver's side gasket FOUR times, and it sounds good at first, but after the engine warms up, I can hear a gas leak. I've used Fel-Pro perforated style gaskets as well as multi-layer aluminum gaskets.
This weekend I went as far as replacing the entire exhaust manifold on the driver's side, new gasket, bolts torqued to spec, and got the biggest leak yet. So after the engine was warm I re-torqued, which made an improvement but not a perfect seal. And in fact, I felt one of the bolts start to strip, probably from inside the cylinder head.
I'm running out of ideas. Is my last option to use bigger bolts and re-tap the holes? Is there any way to ensure a better seal with the gaskets?