I had an interesting experience at Phillip Island the other weekend where my LHS 2.0 litre engine mount rubber caught fire. It was due to a leaking exhaust gasket which had been directing the hot gases directly on to it.
When I look for photos of the mount in workshop manuals there is a reference to "hot air collector plate removed for clarity"
My question is, is the mount normally protected by a heat shield or is this just referrring to the cold start air cleaner intake?
Attached is a photo of the damaged mount, luckily there was enough rubber left for me to get home.
Hi Craig
There is a metal shield which covers the mount. I have had one on a couple of GTV's and had removed them during repairs but not put back.
Chodeboy had same hot gas problem with his V6 recently, well he is full of hot gas anyway.
I have been meaning to look at my mount too as it glows red under full throttle.
You could fabricate another shield from an aluminum heat shield material, it looks like a bubbly Al sandwich sheet. Or someone will have the original lying around I would guess.
Neil
Cheap and easy way would be wrap it in exhaust rap tape.
Quote from: Storm_X on April 29, 2013, 09:56:28 AM
Cheap and easy way would be wrap it in exhaust rap tape.
Or you could do it properly.
Quote from: Storm_X on April 29, 2013, 09:56:28 AM
Cheap and easy way would be wrap it in exhaust rap tape.
Cheap, easy, and effective. Choose any two.
Factory exhaust shield. 4 self tappers.
2 mins to fit.
Exhaust lagging is more effective than the factory tinplate shield. I had extractors on my GTV up in the NT (no speed limit) and running for hours at constant high speed would see the pipes glowing constantly. I managed to melt two mounts (the ten year old original, and a new one) in the space of a few months, with the factory shield in place. I wrapped the next mount in three layers or more of lagging (probably asbestos back then) and the mount lasted out the two remaining years. Oh, and the pipes blew through before I migrated back south.
Maybe the original heat shield had some form of insulation underneath, but on my GTV and GT it was just bent sheetmetal (often a source of rattles).
Quote from: Storm_X on April 29, 2013, 09:56:28 AM
Cheap and easy way would be wrap it in exhaust rap tape.
Sounds pretty sensible to me.
Quote from: Paul Bayly on April 29, 2013, 10:18:12 PM
Maybe the original heat shield had some form of insulation underneath, but on my GTV and GT it was just bent sheetmetal (often a source of rattles).
I think the 164 starter-motor heat shield has insulation on the inside, maybe it was like that (or if not, it should have been).
A good wrap Withstands 900˚C direct/1300˚C intermittent heat.
I don't know but I would rather some tape insulating then a piece of sheet metal that just gets hot again.
Craig, you could try some of our Zircoflex flexible ceramic heatshield material see www.zircotecaustralia.com.au. to cover the mount or if you go with the tin plate shield then ZircoFlex can be attached to either side of the tin shield. Not questioning Pauls positive experience with wrap but it does go brittle after awhile & will retain some moisture wihtin the weave that can result in rust attacks depending on location, usage etc.
Dan.