Manifold replacement

[good soil (pete)]

Hi all,

Anyone had the exhaust manifold replaced on their P&J?
Mine needs doing as it 'ticks' and I have been informed by the gaage that services it that it needs doing.

So, anyone had there's done? How much should I expect it to cost me? Not really bothered about exahaust upgrade or anything like that, so a 'standard' part is what I was thinking......

Cheers
Pete

[hut49]

Are you replacing the manifold(s) itself or just the gasket(s)?

[good soil (pete)]

The manifold itself and obviously the gasket BECAUSE the manifold is being done :-)

Apparently it isblowing in 'the common' place which is in the midle where all the tubes met and therefor can not be accessed and welded but needs replacing.....

[zippee]

I had mine replaced about 5 months ago with ACT stainless De-Cat manifolds. Cost about £540 for the 2 manifolds plus a few hundred labour.
The ACT ones are treated by many as an upgrade BUT are actually cheaper than direct replacement parts from TVR.
Unless you can get a good 2nd hand pair I'd go the ACT option. Also bear in mind that its a known weakness with the std manifold for them to crack, especially on the nearside bank, so you may have to replace again a couple of years down the line.

[philr]

if you do replace the manifold, then consider treating the manifold against heat while its off the car. ie get it coated (silicon ?) or wrapped.

Note that there are differing opinions ove the merits of wrapping, but I would love to get the under bonet heat of my car down.

[good soil (pete)]

Cheers chaps!

So, dumb question time........as there is only one side 'broken' should I bother doing both? Or one at time?

[good soil (pete)]

"if you do replace the manifold, then consider treating the manifold against heat while its off the car. ie get it coated (silicon ?) or wrapped.

Note that there are differing opinions ove the merits of wrapping, but I would love to get the under bonet heat of my car down."

Yeah I'm not really sure about this...my very simplistic non mechanical view of this is.....it' gets hot, surely it's better for hte heat to be able to escape than to be trapped in?
I just don;t really know enough to be able to make a sensible judgement on this

[parrot of doom]

You don't need to replace it. You could have it repaired. IIRC repair usually involves filling it with water to find the leak, then cutting it in half, welding it back together, and jobs a good 'un.

[Flintstone]

philr said:

if you do replace the manifold, then consider treating the manifold against heat while its off the car. ie get it coated (silicon ?) or wrapped. Note that there are differing opinions ove the merits of wrapping, but I would love to get the under bonet heat of my car down.

If you do this be careful. The trapped heat has to go somewhere and will appear downstream ie, under the cabin.

Any rubber exhaust mounts should be replaced with metal springs or similar lest they melt.