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The Mess Hall / Re: Very High Idle - need help!
« Last post by YellowTJ on January 26, 2023, 06:31:33 PM »Long time since this post, but wanted to follow up with the result. Did a smoke test to learn there was a leak at the intake manifold. This was due to the larger flange on the new exhaust header, and since it shares the bolts to cinch down to the head, the slightly thicker flange wasn’t allowing a tight enough seal at the intake manifold, hence the leak. Machined the face of the flange on the exhaust header down, which helped, but ultimately had to machine the upper face at the bolt locations to get it exactly right. Right connection, new gasket, no problems.
Lesson learned, even though it seemed tight and snug, this precision was down to .001” tolerance to really get it right. Thanks everyone for the input.
Lesson learned, even though it seemed tight and snug, this precision was down to .001” tolerance to really get it right. Thanks everyone for the input.