Exhaust Heat Wrap,good Or Bad?

[oldkiteman 6]

My Gti6 manifold is getting hot enough to melt the plastic in the gear change rods and was wondering what everyones opinion was on heat wrap.Googling seems to bring up opinions for and against.

Rob

[welshpug 1,657]

replace the gear rods with metal jointed type from pugracing or bbm.

[dcc 855]

Is your engine running right? I have had a few gti6 engines in 205's anf not often had any trouble with the exhaust temp.

[Anthony 1,003]

Heat is an issue on GTi-6 converted 205's simply due to the proximity of various bits to the exhaust manifold runners, although it's one that most people seem to largely ignore and to a great extent get away with. I've seem several cars with heat damaged parts (coolant pipes, speedo cables, looms) and frankly I'm surprised we've not seen fires with how close I've seen some people running unprotected fuel lines.

 

Whilst it would have preferred not to need to, I heat wrapped mine and it did considerably reduce the heat exposure of surrounding parts, although I accepted that it would result in a shortening of the life of the manifold - not a major issue in my eyes though given how cheaply they're available. You also need to consider that the heat has to go somewhere - most of it will go out with the exhaust gas, but some will likely soak back into the head.

 

Even with mine wrapped, it still managed to partly melt the plastic bung (from a 205 diesel) that I'd used to seal the hole in the bulkhead where the old 8v engine loom used to run. Considering the manifold was cool enough to touch at idle without getting burnt, that probably speaks volumes of the heat produced under sustained load.

[oldkiteman 6]

Is your engine running right? I have had a few gti6 engines in 205's anf not often had any trouble with the exhaust temp.

 

Heat is an issue on GTi-6 converted 205's simply due to the proximity of various bits to the exhaust manifold runners, although it's one that most people seem to largely ignore and to a great extent get away with. I've seem several cars with heat damaged parts (coolant pipes, speedo cables, looms) and frankly I'm surprised we've not seen fires with how close I've seen some people running unprotected fuel lines.

 

Whilst it would have preferred not to need to, I heat wrapped mine and it did considerably reduce the heat exposure of surrounding parts, although I accepted that it would result in a shortening of the life of the manifold - not a major issue in my eyes though given how cheaply they're available. You also need to consider that the heat has to go somewhere - most of it will go out with the exhaust gas, but some will likely soak back into the head.

 

Even with mine wrapped, it still managed to partly melt the plastic bung (from a 205 diesel) that I'd used to seal the hole in the bulkhead where the old 8v engine loom used to run. Considering the manifold was cool enough to touch at idle without getting burnt, that probably speaks volumes of the heat produced under sustained load.

Regarding the first two answers,It was the plastic in the socket of the long rod that comes off the gear lever that melted and I think the engine is running OK.Its not running excessivly rich, I have fitted a diagnostic plug and the lambda readout oscilates correctly.How much does wrapping shorten the life of a manifold?

[petert 586]

Mine are ceramic coated. It solves all the heat and corrosion issues.

 

http://forum.205gtidrivers.com/index.php?showtopic=153642&do=findComment&comment=1379297

Edited August 9, 2016 by petert

[Chipboy 0]

Coated and looking lovely but are they wrapped as well or are you cautious against the negative aspects it may bring?

[petert 586]

No need to wrap if ceramic coated. It stays very cool under the bonnet and firewall. e.g. you can tighten up the gear linkages after a pull on the dyno.

[allye 530 3 Cars]

Only issue with coating is cost. If you think of a amount it would likely be, triple it and you'll be close!

[Chipboy 0]

Only cost me $200 which is less than 100 pounds, thankfully now. Wondering if I can get away with no heat shield but I think not they get hot enough 30 seconds after start to make me think twice.