CMI - bolts keep getting loose
#1
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CMI - bolts keep getting loose
I'm runing CMI cool colars on my 502. (Can't say I gained anything but they do look good.)
One problem - the attaching bolts ( header to head) keep backing off - especially #1 and #8.
Any ideas on the "fix"???? I'm getting tired of tightening them up.
MAV
One problem - the attaching bolts ( header to head) keep backing off - especially #1 and #8.
Any ideas on the "fix"???? I'm getting tired of tightening them up.
MAV
#3
Charter Member # 55
Charter Member
I put CMI's this Spring and read about them coming loose for a lot of people. I just checked mine after about every 2 hrs of run time for the first 10 hrs. Tightened them down the first couple times as a lot of them were a little loose. After that, they stayed tight. I think what happens is the CMI gaskets have to burn in and then the bolts get a bit loose. You may need to start with a fresh set of gaskets and bolts.
Some other people said they went to using studs/nuts to bolt up the headers.
Some other people said they went to using studs/nuts to bolt up the headers.
#5
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Location: Honeoye, NY
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If you use studs in place of the end bolts on each side, life gets lots simpler. Alignment for R&R is easy, the gasket drops in after you have the header in place, and with a crimp type locknut the ends never get loose. Just snug erverything up after the initial gasket "burn-in" and all will be well. --- Jer