I had a similar problem, and it drove me nuts until I got all the air out of
the cooling system. I ended up installing a pressurized surge tank from an
E30 BMW into the cooling system. The primary fitting tapped into the heater
fitting on the water pump and the bleed fitting I tapped a 1/8pipe nipple
into the thermostat housing. Once I did that, the cooling system purges
itself and I haven't had a single overheating problem since.
James Nazarian
71 MGBGT V8
71 MGB Tourer
87 BMW 325es
-----Original Message-----
From: owner-mgb-v8@autox.team.net [mailto:owner-mgb-v8@autox.team.net] On
Behalf Of Trichels
Sent: Tuesday, December 28, 2004 8:52 AM
To: mgb-v8@autox.team.net
Subject: Fw: MGB V8 Conversion
Hi!
After many months of work to stuff a 300 Cubic Inch Buick V8 in a 1977 MGB
Roadster, I finally started the beast a few days ago and everything seems to
be O.K. except for cooling. The engine seems to run a little hot or maybe I
just don't have enough air going through the radiator or something! After
about ten minutes of initial run-in at 2000 RPM the temp crept up to 220 and
probably would have gone up more if I hadn't shut it off. The radiator is a
Davis aluminum cross-flow (19 X 21), 160 degree Stant thermostat, 20 psi cap
and a small (13") mechanical flex-fan which is shrouded. Timing is set at
34 degrees total advance at 3500 RPM. RV8 headers through the fender well.
I'm using an aftermarket mechanical temp gauge since I couldn't locate the
wire to the original gauge, so the accuracy is probably +/- ten degrees.
Has anyone out there had a similar experience with a new engine during
initial run-in? Suggestions?
Thanks in advance for you time in replying,
Doug Trichel
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