P38A 2000 4.6 Vogue - Manifold Heat Shields?

I had to destroy mine when we did the heads as the bolts were rusted solid, so do I need to replace them, or is the car safe without them?

Alternative is exhaust wrapping the manifolds.

Thoughts please.

Peter

PS: We've done 170 miles, new oil and filter, new battery negative cable.

170 and counting. cannot help Peter, I have heard people wrapping the exhause with asbestos rope.

I've got some wrap material, just wondering why it's necessary, given that the Discovery V8's with a smaller engine bay and cast manifolds don't have heat shielding.

Peter

I wrapped mine stainless steel cable ties job done

Here you go

biketeacherdave said:

I wrapped mine stainless steel cable ties job done

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Do you mean you wrapped your manifolds with a proprietary heat proof wrap using stainless steel ties to secure it?

myfirstl322 said:

Do you mean you wrapped your manifolds with a proprietary heat proof wrap using stainless steel ties to secure it?

Click to expand...

That I do.........

I did the same to my new down pipes n cats which means at some point I can deca the old one and refit.

biketeacherdave said:

Here you go

Click to expand...

Tidy job, mine are still on the engine, so access might be an issue.
Peter

Wrapped seems to be the way.

Are the Disco cats closer or work at a different temperature?

I shouted at mine like a rapper when a couple of studs sheared but it didn't make much difference.

Does the rapping keep the heat in or just appear to, because nobody measured it after a long drive?

pwood999 said:

I shouted at mine like a rapper when a couple of studs sheared but it didn't make much difference.

Does the rapping keep the heat in or just appear to, because nobody measured it after a long drive?

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Got to be better than nothing! I was more worried it might keep damp in if left standing with no free air moving and rot the exhaust away.

I've read somewhere that wrapping can cause the manifolds to crack due to localising heat?
I never had a problem getting my heatshields off though - never had time to rust before taking apart again!

martynv8 said:

I've read somewhere that wrapping can cause the manifolds to crack due to localising heat?
I never had a problem getting my heatshields off though - never had time to rust before taking apart again!

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mot tester said wrapping them made for a better burn at the cats no idea if that's true or not but my emmisions were very low then again my cats were new at the time to, been wrapping bike exhausts for years with no problems.

heat protection on the manifolds is a must to prevent heat build up in the engine bay. the P38 has lots running close and the manifolds are thin as they are stainless not cast like on the classic.

BTD went with wrapping and has had no issue. but then again he's still got to fit his LPG.. he said he was going to it before my daughter was conceived.. she's now 9 months,,(just joshing you Dave)..

when I did my top end rebuild I went with the replacement heat shields. and copper greased every bolt that went in. it is a bit like a cinese puzzle getting them in on the offside and you'll need to wind out the suspension damper bolt for access. ive had no problems with them nor removing to torque check the manifold bolts

Haha iv been saying it for far longer, its defo on the cards this september as iv a bit of time off after a long busy summer I'm gonna fit the front end kit then the tank a mate is going to make a bracket so I can mount the spare wheel against the side of the boot where the CD player is as I plan on junking the old stereo soon.

I have everything but a length of faro pipe. What this space or I mite just update my previous LPG install thread.

biketeacherdave said:

mot tester said wrapping them made for a better burn at the cats no idea if that's true or not but my emmisions were very low then again my cats were new at the time to, been wrapping bike exhausts for years with no problems.

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MOT testers are so wise........why aren't they on re-dial?

In context, would you fit a solid fuel stove without insulation?

Its insulated with heat wrap

I give up.