HomeHow do you remove the exhaust manifold on an 83 Chevy half ton with a L6 4.1 liter engine and manual 4 speed trans?
Wiki User
2015-07-15 21:05:31
2015-07-15 21:05:31
Chances are you have one of the engines with an integral manifold. These cannot be removed from the cylinder head. These motors were notorious for cracks in the exhaust manifolds. That's the bad news.
The good news is that many of the 250 c.i. L6 motors from Chevrolet used the same head bolt/water & oil passage patterns so you may be able to swap the head for one from a 1974 or earlier motor. Or, if you want to swap for a 74 or earlier motor, they will go right in.
Related Questions
What engine???????? You should refer to repair manual if not familiar with auto repair and understand the terminology before attempting Remove nuts holding exhaust manifold to cylinder head & remove nuts/bolts holding exhaust manifold to exhaust pipes Use new exhaust manifold gaskets and install the new manifold securing the manifold to cylinder head (may need to but new nuts and or bolts) by "snugly" tightening manifold to cylinder head if not refering to repair manual
You just unbolt it. You first have to disconnect the exhaust pipe from the manifold then remove whatever you have to allow you to access the bolts and remove the manifold. It varies greatly from engine to engine. Some are easy and some are very hard.
You will need to remove the exhaust manifold retaining bolts in your 1993 Chevy Astro. Remove the exhaust manifold. Remove the exhaust manifold gasket and clean the surface. Reverse the process to install the new exhaust manifold gasket.
Remove the exhaust pipe from the exhaust manifold. Remove the manifold bolts. Remove the manifold. Remove the manifold gasket and clean the surface. Reverse the process to install the new manifold gasket.
If it's an automatic you will have to remove the exhaust manifold because the thermostat is located on the backside of the engine on the driver's side under the exhaust manifold.
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