listerdiesel · Aug 28, 2017

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.

tomcat59alan · Aug 28, 2017

170 and counting.

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

listerdiesel · Aug 28, 2017

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

biketeacherdave · Aug 28, 2017

I wrapped mine stainless steel cable ties job done

biketeacherdave · Aug 28, 2017

Here you go

myfirstl322 · Aug 28, 2017

biketeacherdave said:
I wrapped mine stainless steel cable ties job done

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

biketeacherdave · Aug 28, 2017

myfirstl322 said:
Do you mean you wrapped your manifolds with a proprietary heat proof wrap using stainless steel ties to secure it?

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

biketeacherdave · Aug 28, 2017

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

listerdiesel · Aug 28, 2017

biketeacherdave said:
Here you go

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

Grrrrrr · Aug 29, 2017

Wrapped seems to be the way.

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

pwood999 · Aug 30, 2017

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?

Grrrrrr · Aug 30, 2017

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?

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.

martynv8 · Aug 30, 2017

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!

biketeacherdave · Aug 30, 2017

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!

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.

ukadamwest · Aug 30, 2017

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

biketeacherdave · Aug 30, 2017

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.

myfirstl322 · Aug 30, 2017

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.

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

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

biketeacherdave · Aug 30, 2017

Its insulated with heat wrap

myfirstl322 · Aug 31, 2017

I give up.

biketeacherdave · Aug 31, 2017

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