Hot Puma

Quote:

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Originally Posted by digger

So you blokes should do a pictorial step by step on this as I'm sure
a lot of people (me included) would like to see that so they can do theirs!
(most of its in this thread, now step by step photos and taaa daaa! done!:D

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Digger, its piece of Psss mates, I have no pics but here we go.

Remove heat shield from around turbo.

Spray some WD40 on the exhaust bolts and turbo bolts.

Unbolt support bracket between cat and engine block.

Remove front prop shaft, I only unbolted the diff side and swung it across , sitting it on the sway bar .

Remove cross member, “Note “ keep eyes shut, I had heaps of mud and sand in mine :mad:

Unbolt exhaust flange at muffler side, leaving 1 bolt for support.

Remove the bolt from exhaust and turbo side, just let the exhaust rest down on the chassis.

From underneath the truck remove the last support bolt left previously in bottom exhaust flange.

Jiggle the cat out between chassis and engine block.

Wrap new pipe and do it all in reverse “note” make sure you have long sleeves and gloves for this job , If you don’t you’ll know why later.

Not including the wrapping which took me ½ hour the R and R took just on 1 hour on my own , No stands no nothing just a floor crawler trolley and a milk crate to stand on while working in the engine bay .

I did support the cat pipe so i could achieve a tight and even wrapp.

https://www.aulro.com/afvb/images/im...12/11/1032.jpg
https://www.aulro.com/afvb/images/im...12/11/1033.jpg

Oh, they start so nice and clean and white and.......

Hi Dockstrada,
So under the bulge is a vibration/expansion join?
If so shouldn't that be left unwrapped?

Quote:

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Originally Posted by Tomo

Hi Dockstrada,
So under the bulge is a vibration/expansion join?
If so shouldn't that be left unwrapped?

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If there was lots of flex yes but for the minimal vibration and movement in that area and taking into account that the next fixing point is rubber mounted down by the bottom flange over 1mtr away the exhaust sort of shares the flex over the full length so I thought I would pot luck it, hence the 2 straps used, If all fails ill just trim it.

I expect it will be ok.

It certainly makes a huge difference for heat transfer.

Many thanks, Drover.

I've wrapped the 1st half of the exhaust pipe(from turbo to muffler) using the wrap mentioned in this thread, waiting for summer heat to experience the difference. :p

Question, do I have to wrap the rest of the pipe?

BTW, the wrap is not itchy but tingling to me:(

Hi Labrado,

The flex as Dock has described is not an issue, but abnormal flex possibly caused by pressure on the remainder of the pipe could cause excessive flex and result in the need to trim.

For this reason I wrapped mine in 3 segments. Turbo to flex joint, flex joint alone, flex joint to remaining pipe..

I think that the engine pipe is sffecient given the cost of the ceramic wrap, but if temps are up on rear floor go for it.....

The rear floor on my 110 Puma does indeed get quite hot!:(

Amazing how little has changed- I remember leaving a set of Stanley screwdrivers under the passenger seat in my series 3 shorty about 26 years ago, the handles all melted!
The bloke I've just bought my 130 from has covered part of the floor in fancy insulating sheet stuff, looks like attacking the heat at the source as in this thread should be far more effective.

Removal of the cat downpipe may not be as straight forward on some Defenders, especially when the kms get up a bit. Mine has over 200,000 km, and the down pipe studs did not drop free of the turbo outlet flange...about 15mm short.

Using a suitable piece of hardwood, I had to jack under the TH engine mount until the studs cleared the turbo flange...gently! Feeling the moment to not jack to far. It was not enough to jack under the transmission flange. Needed to
tilt it a little.

Hope that makes it easier for the next person. Caused me a bit of a problem, and thought I should have been moved to a slower group for a while there.

I'm also interested in wrapping the decat pipe of my Puma.

The pipe is now installed, do you think is possible to do a decent wrap without remove it again ?
About the ceramic wrap, I see that there are two kind of products. The standard ceramic wrap and some high performance but expensive product.
Is the standard type heat resistance enough for the Puma engine exhaust gas temperature ?

Thanks for any advice!