When this happened to me, the culprit was a torn diaphragm in the mechanical
fuel pump which allowed the gas to drain directly into the engine. Simple
draining and replacing the oil and filter were all that were needed to get
my oil pressure back, and I replaced the pump with an electric one to avoid
a repeat performance.
----- Original Message -----
From: "Mark Hooper" <mhooper@digiscreen.ca>
To: <triumphs@autox.team.net>
Sent: Monday, June 08, 2009 11:19 PM
Subject: [TR] Let loose the flood...
> So after many years of hearing about gas in the sump, I seem to be
> experiencing the joys myself.
>
> I filled my TR6's tank before putting it away last week. I fired it up
> today
> and noticed a definite want of willingness to stay running at idle. Headed
> down the road. bitching about being a quarter tank down after only 10
> miles
> from fillup. After a km or so the engine stalled out after running very
> rough
> at idle kept only going with foot on gas. I noticed the oil pressure was
> low.
> Just could not restart the machine, so came back home on a float. (Thank
> heavens for CAA.)
>
> This evening I filled the dashpots and the car fired right up. Still lousy
> idle, but seemingly better than today. Still had rotten oil pressure
> (normally
> 75-100 cold). On a strange whim I checked the oil level expecting to find
> no
> oil. Instead the stick measured 2 inches over full ! Seemingly oil or gas
> on
> top and a level line about half way up.
>
> I installed a set of triple strombergs last season, but did not get around
> to
> putting in the fuel filter. So, I assume that some grit left a carb bowl
> leaking. I recall that, with a full tank, the TR6 has the carbs below the
> fuel
> level. I think I'm a bit lucky not to have blown myself to bits. I was
> about
> 100 feet from the highway entrance. At 3000 rpm with a sump massively
> overfilled with gas, the conditions under the bonnet would have been quite
> close to a fuel-air bomb. I guess it's safer than it sounds as this must
> have
> been quite a common occurance at one time.
>
> Is there a process here? Just drain the sump and re-fill? Can I just pop
> the
> bowls off and, catching the needle valves, hope the grit will wash out
> with
> some pump levering?
>
> Cheers,
>
> Mark Hooper
> 1972 TR6
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