I have a 930 which has been upgraded to a 3.5l twin turbo. When they did the engine (before my purchase) they removed the engine heat covers and did not replace them. As a result the exhaust heat obviously gets "sucked" back into the engine compartment and increases the overall heat. What options do I have to help reduce the heat other than trying to source some engine covers? Would appreciate your input.

Hi Alcat.  Can you explain a little more, I cant cant get my head around your problem.  Do you mean the tinware that goes around the engine to seal the inside from the outside?

Please excuse my lack of technical knowledge but apparantly its the cover that goes at the base of the engine and prevents heat coming up from the exhausts. This is what I have been told. Could be *censored*. Please excuse my ignorance.

Hi Mate

I think this is what you mean:




If so, then this should only really cause a major problem when at stationary or moving slowly in traffic.  Ideally though you need to replace the tinware as it gives a nice gasket between underside and inside.

I have only eveer replaced these wit the engine out so Im not 100% sure if you can do them with the engine in place.

(Right click on the image and save to your PC so you can see it in full size)

Another option is to lag the manifolds and exposed exhaust with heat wrap this helps insulate the exhaust therfore less heat will disipate from the exhaust and an advantage will be improved heat for the interior heating.

i had some of the tinware replaced on mine when the engine was out to replace the oil cooler. The longer bottom side plates are £40 from Porsche OPC. The worst piece rot-wise was the part above the pre-muffler/CAT as the heat from the exhaust destroys it over time.
The P-specialist (GT One) did say its not absolutely necessary to seal the engine bay but it does prevent warm air from the exhausts being sucked up into the engine bay and into your air box. It also stops all the crap from the road splashing up into your engine bay.

Quote: MarkJ at Feb 10, 2010 11:49:14 am

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i had some of the tinware replaced on mine when the engine was out to replace the oil cooler. The longer bottom side plates are £40 from Porsche OPC. The worst piece rot-wise was the part above the pre-muffler/CAT as the heat from the exhaust destroys it over time.
The P-specialist (GT One) did say its not absolutely necessary to seal the engine bay but it does prevent warm air from the exhausts being sucked up into the engine bay and into your air box. It also stops all the crap from the road splashing up into your engine bay.

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I bought mine in the sates.  They were about US$30.....  big saving and postage was cheap as I had it sent snailmail.

MArk is right tey do prevent the warm air from comming into the engine bay, but I think its minimal when you are moving.  Its main job for me is in keep the crap out of the engine from the road.