Need some help from the list.
I finally got to use my car on a hot day (yesterday in Connecticut) 95+ sunny
degrees.
Engine temp was very good at idle no load, but it would get hot (220F - 230F)
even on a highway drive at 65 - 75 MPH.
As soon as I stop and let the car idle for 8 to 10 minutes, it would "cool"
back down to 180F - 190F. Runs great on cooler (75F or less) days.
I am running the OEM V8 radiator with a 50/50 mix of water to antifreeze. I
have one large electric fan (puller) with a full shroud directly between the
radiator and the engine. 160 degree thermostat. The fan cycles as it should at
idle to maintain temp and is running constantly when the engine is "HOT".
At this point I am thinking it may be due to lack of air flow at speed due to
the bottom third or so of the radiator being "blocked" by the rubber bumper and
solid air dam mounted below it. At idle the fan can pull sufficent air through
but at speed, the air dam is creating a negative pressure just in front of the
lower portion of the radiator thus reducing flow just when the load and
requirement has increased.
I plan to fabricate a duct from the air dam to this area of the radiator, but
at this point I would sure appreciate some advice from all the experts on this
list. I wish to use the "B" as my daily driver but need to solve this first.
Bill Zenkus
74 MGB, 64 Stroked Olds 4.3 l
Email: mgb_zenkus@yahoo.com
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