LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

Headers too close to Valve covers??

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Old Oct 26, 2006 | 04:02 PM
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camaroz28_97's Avatar
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Headers too close to Valve covers??

As you can see from the pics the headers are very close to the valve covers. They are about 1/8" and not totally bolted down yet. Will this be a problem with them so close???





Last edited by camaroz28_97; Oct 26, 2006 at 04:04 PM.
Old Oct 26, 2006 | 04:17 PM
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Don't believe there will be any problems. JMHO
Old Oct 26, 2006 | 04:51 PM
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I wouldn't imagine it would cause a problem as long as its not touching, although I guess its possible to rattle up against them and I really like those valve covers!
Old Oct 26, 2006 | 04:52 PM
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still wouldnt it generate enough heat to do some damage?
Old Oct 26, 2006 | 04:55 PM
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I'd consider insulating the space between the primaries and the valve cover. All that heat is going to be coming off the header tube, and straight into the highly heat conductive aluminum valve covers.

Are those the SLP "dual-cat" headers? Is that why they loop up alongside the valve covers?
Old Oct 26, 2006 | 05:08 PM
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you could probably get a small sheet like one people use to wrap around a starter when its close to the headers
Old Oct 26, 2006 | 05:29 PM
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I noticed that the new valve covers have 3 holes however the old only have2. what do i put in the other hole????

Last edited by camaroz28_97; Oct 26, 2006 at 05:39 PM.
Old Oct 26, 2006 | 06:22 PM
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another breather. where did you get those covers and for how much?
Old Oct 26, 2006 | 06:40 PM
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I dont think SLP put into the design of the headers the fact that some people may use tall covers.... I would insulate it like Fred said.
Old Oct 26, 2006 | 06:40 PM
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Looks like it would be a bitch to take the valve covers off if you ever need to down the road...
Old Oct 26, 2006 | 07:24 PM
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After reading a few of Injuneer's post i see that i have to seal one of those holes so that I can still have a vac. Any suggestions.
Old Oct 26, 2006 | 08:52 PM
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I would. even more so if he said it it makes sence though, leaving it open with a breather will almost act like a vacuum leak and lose power. Maybe use some sort of metal hole plug. Maybe he willl chime in and give more accurate info
BTW, thanks for the PM
Old Oct 26, 2006 | 09:05 PM
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A breather creates a small, semi-controlled vacuum leak through the PCV system. Nothing the long term fuel corrections can't take care of.

Where are the 3 holes.... I only see 2 in the parts of the cover you included in the picture? OR is there a hole in the cover for the other side?
Old Oct 26, 2006 | 09:18 PM
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yeah he has a hole in the driver side cover

Old Oct 27, 2006 | 09:30 AM
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How would one propose to insulate when there is but 1/8" gap? Since the headers probably get around 1000+- degrees anything that actually touches them will be subject to burning, but when the headers are coated and the covers are also reflective, I believe that you are better off not narrowing the gap any further. Since a coated header can be as close as 1/4 inch from a hose without burning it, I would think that 1/8" gap would be ok, so long as you are not running other than NA.

Food for thought though, when considereing After market covers along with headers. JMHO



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