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Jeep Wrangler YJ
YJ General Discussion
Whistling Noise Coming from Engine
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<blockquote data-quote="Flyer58" data-source="post: 437432" data-attributes="member: 18629"><p>Something I've mentioned before here and found interesting about when I had both intake and exhaust manifolds off my '92 was there was no OEM gasket material for the exhaust. Straight metal to metal.</p><p></p><p>The new gasket covered both intake and exhaust ports. To properly fit the two manifolds the factory made the exhaust flange very slightly thicker than the intake so the bolts and washers would evenly apply pressure to the top of both flanges. Simply using a flat washer may clamp hard on the exhaust flange but the intake flange on the other side of the bolt may not be as tight. There are special cupped washers or football washers to clamp evenly on both flanges. There's also extra thick gaskets to help make up the difference and that's what I used.</p><p></p><p>Without them I've read about several intake leaks. It can come down to the gaskets and washers and who did the installation.</p><p></p><p>[ATTACH=full]121003[/ATTACH]</p></blockquote><p></p>
[QUOTE="Flyer58, post: 437432, member: 18629"] Something I've mentioned before here and found interesting about when I had both intake and exhaust manifolds off my '92 was there was no OEM gasket material for the exhaust. Straight metal to metal. The new gasket covered both intake and exhaust ports. To properly fit the two manifolds the factory made the exhaust flange very slightly thicker than the intake so the bolts and washers would evenly apply pressure to the top of both flanges. Simply using a flat washer may clamp hard on the exhaust flange but the intake flange on the other side of the bolt may not be as tight. There are special cupped washers or football washers to clamp evenly on both flanges. There's also extra thick gaskets to help make up the difference and that's what I used. Without them I've read about several intake leaks. It can come down to the gaskets and washers and who did the installation. [ATTACH type="full"]121003[/ATTACH] [/QUOTE]
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Jeep Wrangler YJ
YJ General Discussion
Whistling Noise Coming from Engine
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