Posted by Keith in Washington [24.41.55.59] on Monday, April 22, 2013 at 12:16:45 :
In Reply to: Manafold Question posted by S, Bear [70.192.197.13] on Sunday, April 21, 2013 at 19:30:13 :
Try to install them again as below.
With both intake and exhaust manifolds off the engine block put the gasket between then and install the 4 bolts finger tight.
Install the intake and exhaust manifold unit onto the block without any gaskets. Snug the bolts fairly tight. Now tighten the 4 bolts between the intake and exhaust manifolds to specs.
Remove the intake and exhaust maifold unit from the block. Now use a steel straight edge to check to see if the mounting surfaces are true and flat.
If the surfaces are not flat, take the unit to a machine shop and have the mounting surfaces machined flat.
If the surfaces are flat, install the manifold unit on the block with the gaskets and torque bolts to specifications.
I had a consistent leak until I reinstalled them as above.