Stu
2 areas to look at that I have yet to investigate:
The trunk lock seal is a very loose fit on my Tiger and I can easily move a
.065" drill around the lock area so it could leak there around the lock,
around the edge of the seal or both.
There are 2 large seals at the rear bumper mount that seals the outside
valance to the inside of the trunk.
There are numerous other seals at the rear that could be cracked or leaking.
I'm not sure how to thoroughly check for leaks at the trunk other than
pressurizing the trunk or doing a smoke test to find leaks.
I found this in a email from Theo Smit some time ago:
Tom Hall also mentioned at some point that there is a ventilation (?) hole
or sheetmetal gap on each side of the car, from under the rear-seat shelf to
the rear quarterpanel area (in front of the rear wheels). If this is open,
then you can definitely suck all kinds of nasty fumes in.
Best regards,
Theo
This is one of those problems that can be difficult to isolate due to the
multitude of possibilities. I can only suggest that you don't rule out any
possible cause without completely checking first.
Ron Fraser
-----Original Message-----
From: tigers-bounces@autox.team.net [mailto:tigers-bounces@autox.team.net]
On Behalf Of Stu Brennan
Sent: Saturday, November 06, 2010 1:44 PM
To: tigers@autox.team.net
Subject: [Tigers] Exhaust Smell
I put the hard top on the Tiger last weekend, then was fooling around in the
cellar for a couple minutes. When I saw something on the cellar wall, one
of those little light bulbs appeared above my head.
So half an hour later I'm driving the Tiger around the area with a Carbon
Monoxide detector as a passenger. Mine has a little LCD readout on it to
report the concentration of CO. I tried various combinations of windows
open and closed, vents open and closed, etc. The readout stayed at zero,
maybe hitting 3 ppm once, but other than that, zero. There was no smell
other than that of the normal interior fragrances.
Back home, I parked in the yard, the car idling while I fiddled with stuff
in the cubby for a minute. Almost the same time I noticed the exhaust
smell, the CO detector went off. Damn, that thing is loud in a closed car.
OK, my trunk gasket is relatively new, and it passed the "dollar bill" test
all around. The trunk floor is good, the only holes being the drains under
the tanks. It is sealed around the jack points. The exhaust system is like
new, no rust at all. I started the Tiger outside this morning, quite chilly
here in Massachusetts, and while I got visible vapor as the exhaust hit the
cool air at the rear, there appeared to be no leaks. The top seals pretty
good, relatively new gaskets on that, too. The firewall holes are all
plugged.
So where else could the fumes be getting in? I seem to remember mention
years back about a sneak path through the body, over the rear axel
somewhere. Could this be my problem?
Stu
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