I'm attempting to reinstall the heat riser on my BB after purchasing a replacement flange donut (Fel-Pro) from a local parts store. Using the same studs that I removed months ago I don't get enough exposed threads to attach the nuts. Unfortunately I discarded the old donut so I can't compare the thickness of the old with the new. My first though was that the new donut is too thick. It's listed as 5/8" (.625") thick but actually measures .662". Seems like that's not enough to cause my issue if the original was 5/8".
Can anyone tell me what the thickness of the donut should be?
Should the studs be tightly seated into the exhaust manifold? I don't see any information in the AIM or service manual regarding stud tightness. I did back the studs out a couple of threads, but still not enough to get the nuts attached properly. Of course I don't want to back the studs out too far.
Any suggestions.
Thanks
Mike
Can anyone tell me what the thickness of the donut should be?
Should the studs be tightly seated into the exhaust manifold? I don't see any information in the AIM or service manual regarding stud tightness. I did back the studs out a couple of threads, but still not enough to get the nuts attached properly. Of course I don't want to back the studs out too far.
Any suggestions.
Thanks
Mike
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