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Aug 24th, 2023
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Joined: May 2015
Posts: 609 Likes: 19
Talk Morgan Regular
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OP
Talk Morgan Regular
Joined: May 2015
Posts: 609 Likes: 19 |
Over the weekend I fitted the GDI Club sport exhaust to my +4, the full system with the twin tail pipe. A 40mile test drive showed that the car now suffers from exhaust fumes in the cabin, car running with the hood down and side screens on. A major difference in the pipe is that the outlets are some 25 mm higher, than the previous single outlet pipe, and thus quite near to the rear of the wing. I then refitted the old single outlet tail pipe and the problem has gone away.
I would be interested to know if any others have found this issue with the twin outlet pipe and what was your fix?
Cheers
John
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Joined: Mar 2009
Posts: 3,665 Likes: 43
Talk Morgan Addict
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Talk Morgan Addict
Joined: Mar 2009
Posts: 3,665 Likes: 43 |
Is the older one longer as well, maybe avoiding the rear upstream?
Nick
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Joined: May 2015
Posts: 609 Likes: 19
Talk Morgan Regular
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OP
Talk Morgan Regular
Joined: May 2015
Posts: 609 Likes: 19 |
No it's not any longer, but the fact that it's lower might well mean it's out of the upstream.
John
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Joined: Mar 2009
Posts: 3,665 Likes: 43
Talk Morgan Addict
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Talk Morgan Addict
Joined: Mar 2009
Posts: 3,665 Likes: 43 |
You can buy tailpiece trims on ebay which have a curved end throwing the exhaust downwards and/or outwards. They just fix on with a couple of clamps.
I had to do this with my mg, it did solve the problem. Cost of part £8. Actually, I think I bought from Amazon.
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Joined: Aug 2009
Posts: 155
L - Learner Plates On
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L - Learner Plates On
Joined: Aug 2009
Posts: 155 |
Did the sports exhaust include a Sports catalytic converter?
I discovered that the original Sports cats fitted to my old 3.7 Roadster were never type approved, so it's no wonder that I could smell exhaust fumes in the car.
Fitting side exit exhausts cured the smell, but the emissions were still very iffy - so much so that I got rid of the car.
Sid
Ex 2014 3.7 Roadster in Ferrari Le Mans Blue
Ex Indigo Blue '99 +4
Ex MogMMX Innovations winner
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Joined: May 2015
Posts: 609 Likes: 19
Talk Morgan Regular
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OP
Talk Morgan Regular
Joined: May 2015
Posts: 609 Likes: 19 |
You can buy tailpiece trims on ebay which have a curved end throwing the exhaust downwards and/or outwards. They just fix on with a couple of clamps.
I had to do this with my mg, it did solve the problem. Cost of part £8. Actually, I think I bought from Amazon. Thanks for the tip, something like that was next on my list to do. Did the sports exhaust include a Sports catalytic converter?
I discovered that the original Sports cats fitted to my old 3.7 Roadster were never type approved, so it's no wonder that I could smell exhaust fumes in the car.
Fitting side exit exhausts cured the smell, but the emissions were still very iffy - so much so that I got rid of the car.
It is a whole new exhaust system from MMC. As MMC sold new cars with the system fitted I would have thought so. But at the moment I just want to stop the fumes getting into the car. Cheers John
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Joined: Jun 2015
Posts: 1,951 Likes: 40
Talk Morgan Enthusiast
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Talk Morgan Enthusiast
Joined: Jun 2015
Posts: 1,951 Likes: 40 |
A 40 mile run isn’t much to get heat in to burn off protective coatings, etc. Did you use some sort of exhaust paste on the joins? That could be the culprit until it hardens off. I would give it some time and mileage to see if it settles down.
Doug
2011 Plus 4 in Rich Maroon
1972 750 “ComDom” sprinter
1958 Triton 650
1992 Triumph Trophy 900
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Joined: Sep 2009
Posts: 7,342 Likes: 91
Talk Morgan Guru
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Talk Morgan Guru
Joined: Sep 2009
Posts: 7,342 Likes: 91 |
A 40 mile run isn’t much to get heat in to burn off protective coatings, etc. Did you use some sort of exhaust paste on the joins? That could be the culprit until it hardens off. I would give it some time and mileage to see if it settles down. +1
'14 4/4 graphite grey
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Joined: Mar 2009
Posts: 3,665 Likes: 43
Talk Morgan Addict
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Talk Morgan Addict
Joined: Mar 2009
Posts: 3,665 Likes: 43 |
My 4/4 (2014 model) had fumes coming in. Once the cat got hot you could no longer smell anything but still, the fumes came in, you know because of the smell until the cat kicked in.
I had side exhaust fitted about three years ago which solved the problem.
Nick
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Joined: Feb 2016
Posts: 7,916 Likes: 216
Talk Morgan Guru
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Talk Morgan Guru
Joined: Feb 2016
Posts: 7,916 Likes: 216 |
+1 for side exhausts which give better ground clearance as well 
Richard
2018 Roadster 3.7
1966 Land Rover S2a 88
2024 Royal Enfield Guerrilla 450
1945 Guzzi Airone
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