Poly Exhaust Mount Kit - Any Feedback?

Poly Exhaust Mount Kit - Any Feedback?

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Discussion

ChimpOnGas

Original Poster:

8,462 posts

118 months

Monday 23rd October 2017
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Checking the car over at the weekend it looks like my old rubber exhaust mountings are shot, they've gone soft!

While I'm typically a metalistic bush man when it comes to wishbones, diff mounts, ect... I have fitted poly bushes on my ARB which seem to work fine. I'm now tempted to try poly on the exhaust as I see you can buy undertray mounting bobbins and the hanger bush in and poly, so I'm thinking as these will be unaffected by oil like rubber they may be worth a try?

Is anyone using poly on their Chimaera exhaust, if so what is your opinion, my concern is they may cause squeaks and allow more vibration into the car?

Here's what I'm considering...





Or am I better off just sticking with good old fashioned rubber?

ChimpOnGas

Original Poster:

8,462 posts

118 months

Saturday 5th January
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I'll answer my own question then biggrin

The above polly exhaust mounting kit works really well, unlike rubber that swells and splits polyurethane is completely impervious to oil.

I can also confirm they do not promote squeaks, they are completely silent in fact.

https://www.outlawmotorsport.co.uk/product-page/tv...

And....

https://www.outlawmotorsport.co.uk/product-page/tv...

Outlaw Motorsport offer lots of colour choice, but being a conservative chap I just went with black.

Recommended thumbup

Classic Chim

8,782 posts

88 months

Saturday 5th January
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Only time heat and miles will tell.
I replaced my rubber ones and it only took about a year before they were looking very second hand so you can’t loose much.

ChimpOnGas

Original Poster:

8,462 posts

118 months

Saturday 5th January
quotequote all
Classic Chim said:
Only time heat and miles will tell.
I replaced my rubber ones and it only took about a year before they were looking very second hand so you can’t loose much.
Four months fitted and 3,000 miles covered they seem spot on so far Alun, there's also no argument rubber swells and splits, compared with rubber polyurethane is known to be very long lasting and is of course completely impervious to oil.

I would never fit polyurethane suspension bushes but I have run polyurethane anti-roll bar bushes front and rear for over 7 years now and they have been perfect, even though they've seen a lot of oil over that time.

Along with my 7 year old polyurethane ARB bushes I now have polyurethane diff bushes and the polyurethane exhaust mounting kit we're discussing here so I'm confident they will last at least as long as my ARB bushes have which actually still look new. For the listed areas but not suspension bushes where I've stuck with metastatic, polyurethane looks to be the ideal material especially where there's oil and other contaminants present.

I'm a polyurethane fan now, but my suspension bushes will always remain metastatic with nylon thrust washers as they give great handling and excellent ride quality, polyurethane suspension bushes can in my experience give a harsh ride and I've even seen them melt too (upper wishbone bushes close to exhaust manifolds).

1. Anti-roll bar bushes = Polyurethane thumbup

2. Diff bushes = Polyurethane thumbup

3. Exhaust mounting bobbins and hanger = Polyurethane thumbup

4. Suspension bushes = Metastatic with nylon thrust washers thumbup

5. And a set of Ben Lang's excellent Mk4 Tuscan 'S' spec big bush Bilsteins to complete the job thumbup


motul1974

530 posts

78 months

Saturday 5th January
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Is replying to your own post a first on here I wonder???? laugh

...thanks for the replying, I looked at these before but just went back to rubber.
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phazed

17,340 posts

143 months

Saturday 5th January
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Dave, we must do a back to back someday as my car is full poly and it would be very interesting to see if there is much of a difference.

Apart from.......my rubber exhaust bobbins.

Thanks for the heads up, I'll order a set now.

ChimpOnGas

Original Poster:

8,462 posts

118 months

Saturday 5th January
quotequote all
phazed said:
Dave, we must do a back to back someday as my car is full poly and it would be very interesting to see if there is much of a difference.

Apart from.......my rubber exhaust bobbins.

Thanks for the heads up, I'll order a set now.
thumbup

It’s the Bicester Heritage Sunday scramble tomorrow Peter, I’ll be there from 9.00am if you fancy it?

phazed

17,340 posts

143 months

Saturday 5th January
quotequote all
ChimpOnGas said:
thumbup

It’s the Bicester Heritage Sunday scramble tomorrow Peter, I’ll be there from 9.00am if you fancy it?
Defo not! I've other problems to sort first..........

I'll sort a late spring/early summer bbq...with a bit of driving.

ChimpOnGas

Original Poster:

8,462 posts

118 months

Saturday 5th January
quotequote all
phazed said:
ChimpOnGas said:
thumbup

It’s the Bicester Heritage Sunday scramble tomorrow Peter, I’ll be there from 9.00am if you fancy it?
Defo not! I've other problems to sort first..........

I'll sort a late spring/early summer bbq...with a bit of driving.
BBQ sounds great thumbup

Hope you get your other problems sorted, shout if you need any help mate?

D.



Jobster

46 posts

37 months

Saturday 5th January
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motul1974 said:
Is replying to your own post a first on here I wonder???? laugh

...thanks for the replying, I looked at these before but just went back to rubber.
And such a short answer to his own post too. Remarkable....

ChimpOnGas

Original Poster:

8,462 posts

118 months

Saturday 5th January
quotequote all
Jobster said:
motul1974 said:
Is replying to your own post a first on here I wonder???? laugh

...thanks for the replying, I looked at these before but just went back to rubber.
And such a short answer to his own post too. Remarkable....
For the avoidance of any doubt, I've answered my own post in the spirit of sharing information.

I do so in the hope it may be of help to the community, this is the foundation concept behind all the PH forums and is especially true of the TVR forums where decent right minded enthusiasts freely share information in the hope it may help their fellow TVR enthusiasts in some way.

Rightly of wrongly this has always been my approach to Piston Heads, so feel free to ridicule me for that rolleyes.

Sadly its quite clear our precious TVR PH forum and information resource we've built together as a community is slowly dying, and thats very sad frown. Face Book being a key part of the problem, personally I remain committed to keeping PH alive by sharing information because on FB information is shared then lost to the wind in seconds.

Clearly the PH forum information resource is only as good as the constructive contributions freely made by the enthusiast who post, you'll always get the idiots who contribute nothing other than sarcastic comments but I bet they are searching for information and benefiting from it like us all, they are the leaches, but you find leaches in all walks of life so I guess it's to be expected... but never tolerated!

For the record I will continue to share my experiences even if that does mean answering by own post, I'm not embarrassed by that one bit because I genuinely believe the sharing of information is what being part of a community is all about.

I genuinely hope this post is helpful to someone, the rubber exhaust bobbins on our cars do get covered in oil and being rubber that means they do go soft, exhaust knocks and low tail pipes being the inevitable and extremely common consequence. If you go with these polly bobbins and hanger you fix that problem in a stroke, that's all I'm pointing out here so if it helps just one fellow enthusiast my work is done wink







ChimpOnGas

Original Poster:

8,462 posts

118 months

Sunday 6th January
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A friends discovery today, mine were the same if not worse, totally shot!

This is what happens to the rubber bobins when oil gets on them, the polly ones completely solve this problem so are well worth considering.

Mr Plow

1,153 posts

167 months

Monday 7th January
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Useful information. Thanks for sharing. Exhaust Poly bushes next on the shopping list.

spitfire4v8

2,769 posts

120 months

Tuesday 8th January
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The std rubber ones are cheap enough to be a longer-term service replace item, but poly should last even longer as suggested.
The only caveat to this is to watch out for them getting hot. I had a car in recently with poly engine mounts, the heat from the exhaust was causing them to melt and drip gooey orange drips from the bottom of the mountings.

N7GTX

3,802 posts

82 months

Tuesday 8th January
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spitfire4v8 said:
The std rubber ones are cheap enough to be a longer-term service replace item, but poly should last even longer as suggested.
The only caveat to this is to watch out for them getting hot. I had a car in recently with poly engine mounts, the heat from the exhaust was causing them to melt and drip gooey orange drips from the bottom of the mountings.
If you buy the correct kit from Racetech etc, there is a sheet of heat resistant material supplied to wrap around the chassis at this point (upper rear nearside). It did the job very well for me.

phazed

17,340 posts

143 months

Tuesday 8th January
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My poly's should arrive tomorrow so will fit and report.

My rubbers are past it so necessary as well as an upgrade of sorts!

Loubaruch

757 posts

137 months

Tuesday 8th January
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Are those Poly exhaust bobbins £25 each!

If so makes replacement a dear option

phazed

17,340 posts

143 months

Tuesday 8th January
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I certainly hope not!

phazed

17,340 posts

143 months

Sunday 13th January
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Fitted them today.

Test drove car and all good.




lancelin

94 posts

60 months

Sunday 13th January
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Nice, that’s a very clean tray and exhaust. Mine is covered in oil and that’s after an engine rebuild. I’m still not sure where it’s coming from. :-(. Fitted my bushes today. 👍