Manifold wrap advice please

[F908 Tim]

I have a tear in my exhaust manifold wrap which I want to repair.
Ordered some more today and the thought occured ...do I actually need to take the old wrap off?

It would be easier to put a second wrap on top of the first and just make it thicker where the original is broken to keep the same thickness throughout.

Thoughts and experience please...is it possible to over wrap and keep too much heat in the manifolds?
Does this turn a good thing into a bad thing?
Cheers chaps

[z_chromozone]

F908 Tim said:

I have a tear in my exhaust manifold wrap which I want to repair. Ordered some more today and the thought occured ...do I actually need to take the old wrap off? It would be easier to put a second wrap on top of the first and just make it thicker where the original is broken to keep the same thickness throughout. Thoughts and experience please...is it possible to over wrap and keep too much heat in the manifolds? Does this turn a good thing into a bad thing? Cheers chaps

Impossible to keep too much heat in the manifolds, the more heat the faster the gas and the greater the power to a small degree. I'm not sure of the melting point of mild / stainless, but it must be well above the temps exhaust gases can produce. As long as the wrap will not catch alight I can't see a problem.

Z

[F908 Tim]

Thanks Steve,...just what I wanted to hear!
At last..A job made easier

[GreenV8S]

Wrapping mine involved lots of pulling long lengths of wrap through small gaps. Which works fine when you're pulling it past a smooth exhaust manifold, but might not work so well when you're trying to pull it past another layer of rather grippy exhaust wrap?

[johno]

I wrapped those very exhaust manifolds .... by my fair hands ... good to see they have lasted so long ..

I did them with the manifolds in place and would recommend removing the old stuff before for the follwoing reasons...

1 - Long lengths, tights gaps (GreenV8s)
2 - Getting tension on moving old wrap
3 - will look untidy

Rather you than me !

Need to mine though !

[F908 Tim]

Hi Johno Hows the Griff?

Wrapped the manifolds last night and wasn't to bad a job.Looks tidy and bought more clamps than I needed.

Didn't have time to heat the engine last night so when I arrived at work this morning it was with a cloud of smoke appearing under the front arches and an acrid smell.

Needs to run a good while to let the new wrap bed in.

[Kentish]

SOunds a bit like the wifes freelander

Since having the head gasket replaced under warranty it stinks of anti-freeze and that awful smell of gearbox oil.

Those 2 smells combined when you switch the heater on are

[johno]

F908 Tim said:

Hi Johno Hows the Griff? Wrapped the manifolds last night and wasn't to bad a job.Looks tidy and bought more clamps than I needed. Didn't have time to heat the engine last night so when I arrived at work this morning it was with a cloud of smoke appearing under the front arches and an acrid smell. Needs to run a good while to let the new wrap bed in.

Griffith is really well thanks Tim ....

Glad to see you'll still enjoying the car ...