Header flanges shrunk
05-01-2008, 07:05 PM
#1
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Header flanges shrunk My car has been down for about 6 months. I few weeks ago I put on some new heads. Came time to bolt up the headers and the bolt holes did not like up. I thought the problem was with the new head so I removed the headers and tried to bolt it up to the old head. The bolt holes do no line up. They are off by about 1.5mm. I can get in the 2 middle bolts and the 2 to either side, but not all 6 at the same time. I had no problems when they were removed a couple months ago. They are kooks 1 7/8. Any ideas what could have caused this?
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05-01-2008, 08:54 PM
#3
^ there should be a little wiggle room in each bolt hole on the flange. I had this happen before and I was about to throw a header through the windshield. I had to just start each one a little and make it line up before tightening them down.
05-01-2008, 11:02 PM
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I would take a dremel and widen the holes in the header. You don't want to stress the bolts going into your aluminum head. I turned all my header bolts in by hand almost all the way before putting a wrench on them. Make sure you put some anti-sieze on those bolts and never force them.
05-02-2008, 12:03 PM
#6
I would take a dremel and widen the holes in the header. You don't want to stress the bolts going into your aluminum head. I turned all my header bolts in by hand almost all the way before putting a wrench on them. Make sure you put some anti-sieze on those bolts and never force them.
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05-02-2008, 02:05 PM
#8
Anti - seize on header bolts ???? I did that ONCE . After losing header bolts going down the road and then I had to forever tighten them at least once a month . screw that ! LOL !!!
To each his own , but aint no way im doin that . I can see putting anti-sieze on your spark plugs though . BTW, I have never had one problem with stripping bolt holes or header bolt loosening or losing bolts. They always come right out without anti-seize . Maybe im just lucky IDK .
To each his own , but aint no way im doin that . I can see putting anti-sieze on your spark plugs though . BTW, I have never had one problem with stripping bolt holes or header bolt loosening or losing bolts. They always come right out without anti-seize . Maybe im just lucky IDK .
05-02-2008, 03:13 PM
#9
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We've drilled out header flanges before too. I put either anti seize or thread locker on every bolt I turn. Went with the locking "Stage 8" header bolts and haven't had any problems.