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Defender 200tdi Exhaust Heatshields...Thoughts please.

Hi all,

Ive just ordered a new downpipe for my 1992 200tdi 90 and discovered that it *should* have 2 heat shields on it, one (NTC4833) which goes over the turbo and most of the way down the down pipe between the exhaust and the bulkhead and the other somwhere towards the end of the downpipe.

Mine has the remains of the heatshield immediatly over the top of the turbo but doesnt go downwards and the other is just missing.

So... Im assuming they dont really serve any great purpose as ive done about 10,000 miles without either of them?

However, as a side note my engine still shows as running hot (needle towards the end of the white on the gauge) after having a new radiator, thermostat, viscous coupling etc. Compression good and no water leaks or steam.

Is it possible that the lack of these heat shields is causing a build up of heat under the bonnet and thus showing a high temperature reading??

If above is not likely do the sender units or temp gauges go out of calibration after a time??

Jon

Reply to
Jon
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C'mon guys... whats the general concensus? Are these heatshields of any real use? Should I replace my missing ones?

I noticed the other day one of my brake pipes runs close and parallel to the downpipe? But I seem to be able to stop!

Jon

Reply to
Jon

A heat shield reduces radiated heat, it they are there to reduce the heat in the footwell radiated through the bulkhead then you could get away with not bothering with them, if there are brake/clutch pipes there or relays and suchlike then I'd expect the heat shields are there to protect them and so I'd replace them.

if the price of the heatshields seems expensive you could easily fabricate something and mount it on the bulkhead.

Regards. Mark.(AKA, Mr.Nice.)

Reply to
MVP

Thanks very much Mark.

The engine side of my bulkhead has what i can only guess is a heat reflecting / sound deadening material stuck to it, put on by the previous owner - To describe it you would have to say its about an 8mm black foam with tin foil on outside.

Undeneath is a different story though. Fabrication time at the weekend me thinks!

Thanks jon

Reply to
Jon

That's standard insulation. In answer to your question, the heat shields are there for a reason (car makers never fit anything that isn't necessary), however for the UK climate it's quite possible that they can got away with. Certainly on my 110 which gets well and truly used there is no general overheating problem, except that occasionaly after good two/three hour thrash down the motorway I loose 90% of the clutch until the fliud cools down! Backing off speed by 5mph is just enough to stop the problem though.

Richard

Reply to
beamendsltd

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