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Van Diesel



Member Since: 12 Oct 2013
Location: Suffolk
Posts: 173

United Kingdom 1986 Defender 90 V8 Petrol ST Auto Pennine Grey
V8 Soft top and fumes
Test drove a 1984 90 V8 pick up with a soft top conversion today.

It had only run for a few minutes before the test drive but there was quite a build up of fumes inside whilst driving round a few back roads.
That 90 wasn't the one for me but if I converted a V8 to a soft top are the fumes going to be a standard thing or did that engine need a bit of fettling? No leaks from exhaust, pipe exited on n/s corner.
Post #946410 20th Mar 2022 10:06pm
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Linds Hanson



Member Since: 16 Jan 2021
Location: Cornwall
Posts: 438

United Kingdom 
Normal with soft top if non cat
Post #946418 20th Mar 2022 11:45pm
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GREENI



Member Since: 22 Aug 2010
Location: staffs
Posts: 10359

United Kingdom 
I run with the rear AND SIDES rolled up ALL of the time, it stops fumes that you get with the rear only rolled up and bizarrely the heaters are more effective as the airflow seems to draw the heat in. We once drove to Ginjez’s breakfast meet in Yorkshire (from Staffs) in winter with the hood fully closed and it was freezing, we had to stop to get a blanket at the services Laughing



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Post #946423 21st Mar 2022 7:46am
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Van Diesel



Member Since: 12 Oct 2013
Location: Suffolk
Posts: 173

United Kingdom 1986 Defender 90 V8 Petrol ST Auto Pennine Grey
Thanks both, good info to a relative newbie.

Greeni's option still encourages me to do a soft top conversion. I think on the test drive the rear was also down so I was surprised by the amount of fumes.

Nice looking truck too. Thumbs Up
Post #946424 21st Mar 2022 7:54am
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GREENI



Member Since: 22 Aug 2010
Location: staffs
Posts: 10359

United Kingdom 
Only downside is the hood moves around at speed and flaps against the cage, so it’s a bit noisy.
But in ‘summer mode’ it’s quiet enough that the missus actually can fall asleep.. (though she admits the v8 burble is soothing and that’s why she falls asleep).

Summer mode:



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Post #946426 21st Mar 2022 8:09am
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ginjez



Member Since: 18 Sep 2011
Location: huddersfield
Posts: 1750

2011 Defender 90 Puma 2.4 ST Santorini Black
I know mine is diesel and doesn't seem to suffer from fumes being pulled into the cab but with hood totally off it was very draughty around neck and shoulders. I went some way to sorting this by having a mesh curtain made which attaches behind the seats similar to what you get with an slk. It certainly improves things considerably



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Last edited by ginjez on 21st Mar 2022 8:47am. Edited 1 time in total
Post #946429 21st Mar 2022 8:45am
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blackwolf



Member Since: 03 Nov 2009
Location: South West England
Posts: 16871

United Kingdom 2007 Defender 110 Puma 2.4 DCPU Stornoway Grey
The fact that driving with the rear curtain rolled up inevitably causes exhaust fumes to be drawn into the vehicle is usually stated as the reason for the introduction of the dash vents in 1954.

At the time the dash vents were deleted in 2007 I don't think that there were any models available from the factory with full-length tilts, and that, together with the new dash trim and instrument pack introduced with the TDCi models, is undoubtedly the reason why the vents were deleted.
Post #946430 21st Mar 2022 8:46am
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markb110



Member Since: 22 May 2010
Location: Guildford
Posts: 2520

England 2002 Defender 90 Td5 HT Epsom Green
Exmoor Trim used to make a fume guard that attached behind the front seats like a load guard.

A friend of mine used his in his 90 HT in the winter as it would also warm the cab up quicker.

Worth a look to see if they still make it

Thumbs Up
Post #946431 21st Mar 2022 8:49am
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defender9



Member Since: 12 Mar 2016
Location: Fylde Coast
Posts: 1613

United Kingdom 2015 Defender 90 Puma 2.2 SW Keswick Green
I have a 1985 V8 Ninety and don’t seem to have problems with fumes with just the back rolled up. You can get a fume curtain from the likes of Undercover Covers but that might defeat the object of having the back rolled up.
Post #946447 21st Mar 2022 10:58am
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JOW240725



Member Since: 04 May 2015
Location: Suffolk
Posts: 7873

United Kingdom 2012 Defender 110 Puma 2.2 XS CSW Orkney Grey
When I had my S/S exhaust fitted they suggested a side exit was better for less fumes. I've run about with just back up and back and sides rolled up and no issues with fumes. This weekend was great fun but whilst beautifully sunny was not warm! Rolling with laughter Lovely and warm in the front!! Laughing


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 James
MY2012 110 2.2TDCi XS SW Orkney Grey - http://www.defender2.net/forum/topic43410.html
MY1990 110 200TDi SW beautifully faded Portofino Red - https://www.defender2.net/forum/post743641.html#743641
MY1984 90 V8 Slate Grey - https://www.defender2.net/forum/post744557.html#744557
Instagram @suffolk_rovers
Post #946490 21st Mar 2022 4:02pm
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defender9



Member Since: 12 Mar 2016
Location: Fylde Coast
Posts: 1613

United Kingdom 2015 Defender 90 Puma 2.2 SW Keswick Green
Looks good with the Purely Metal hoops and the canvas seat covers Thumbs Up
Post #946503 21st Mar 2022 6:29pm
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diesel_jim



Member Since: 13 Oct 2008
Location: hiding
Posts: 6036

United Kingdom 2006 Defender 110 Td5 SW Epsom Green
The Td5 soft top I built a few years back never suffered from any fumes in the cab, not that I recall anyway. Had a standard Td5 tail pipe angled slightly as they are.




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Full summer mode! Cool
Post #946506 21st Mar 2022 6:59pm
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Van Diesel



Member Since: 12 Oct 2013
Location: Suffolk
Posts: 173

United Kingdom 1986 Defender 90 V8 Petrol ST Auto Pennine Grey
Thanks everyone. Glad I posted now and didn't expect to get so many replies.
Definitely given me some ideas to look into. Just feel the 90 truck cab is a bit too enclosed and love to hear that V8 note but without the fumes, they were quite over powering for a short journey.
Post #946518 21st Mar 2022 9:10pm
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Iggle piggle



Member Since: 10 Sep 2014
Location: Wales
Posts: 378

United Kingdom 1989 Defender 90 V8 Petrol ST Alpine White
It’s something I noticed a lot when I converted to soft top,
Rolling just the back up is a no no
The back & sides is bearable, cracking the vents open does help
But I find rolling the rear quarter lights up with the sides & rear has the best result & a lot less flapping!



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Post #946519 21st Mar 2022 9:29pm
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mikeh501



Member Since: 07 Jan 2013
Location: United Kingdom
Posts: 1142

United Kingdom 
Interesting debate… no fumes at all in my v8 soft top with just the back and or sides up or down. Weird. I’m running cats.
Post #946521 21st Mar 2022 9:48pm
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