TD5 ceramic coated manifold - should the heat shield go back on ontop?

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Originally Posted by nismine01

I left the heat shield off mine once, set the bonnet sound proofing on fire!!

I soon put it back on.

Mike

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I've had my heat shield off for about 6 years now, removed my bonnet sound proofing at about the same time, had no problem with my exhaust manifold in that time. I think your bonnet sound proofing would have only caught on fire if it was saturated with oil, which is another problem, altogether.

Ditto - I have a stock original manifold and have had no heat shield for around three years now and see no problems. I run higher than factory boost and my experience is that that keeps my EGT's well down compared to pre mod.

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Originally Posted by oztayls

No idea myself except that I know that copper is softer and is a better conductor of heat than steel so makes sense in that respect. It's not new science as copper nuts on studs are used by a number of motor brands

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Actually, I learned something the other day from a LR parts vendor regarding the snapping studs. This is what they wrote me:

"We have lots of experience in this area, the real problem was inadequate clearance for the studs whilst the manifold expanded and contracted, once a warped manifold has been linished straight they don't tend to warp any more, the stud holes should be drilled out to provide extra clearance. New Genuine serrated nuts correctly torqued (25Nm), longer shanked studs, and greased manifold gaskets. Hope this helps."

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Originally Posted by oztayls

Actually, I learned something the other day from a LR parts vendor regarding the snapping studs. This is what they wrote me:

"We have lots of experience in this area, the real problem was inadequate clearance for the studs whilst the manifold expanded and contracted, once a warped manifold has been linished straight they don't tend to warp any more, the stud holes should be drilled out to provide extra clearance. New Genuine serrated nuts correctly torqued (25Nm), longer shanked studs, and greased manifold gaskets. Hope this helps."

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IM guessing they mean greased studs not manifold gaskets:Rolling: