Hi guys-
I have finished the resurection on the ‘‘old kitty’’(74 XJ6L),
new paint, detailed engine, tuned, cleaned, and generally made it
as new as possible. However, test driving it prior to delivering
it back to my brother-in-law in North Carolina, it very quickly
pegs the temp gauge at ‘‘hot’’. Have done the following:
- balanced carbs (way off-got rid of miss)
- set timing at 0 deg
- checked vac and centrifugal advance
- checked thermostatic overheat protection valve
- new 160 deg thermostat
- flushed cooling system twice
- high pressure washed the radiator fins
- checked waterpump belt
- adjusted shiftdown cable and front trans band
All of this did nothing to cure my overheat problem. I thought it
might be the fan clutch but at 70 mph on the interstate, still no
cooling. Now I’m thinking plugged cats(how do I check 'em)? or
blown head gasket(tell me it ain’t so). After refilling the
cooling system I do see large bubbles occasionally which I thought
were the system gulping and expelling trapped air. I also see
occasional ‘‘spritzes’’ of small bubbles which worry me a little bit
more than somewhat.
Temperature outside today is 93 deg F. Surely I don’t need to
leave it parked because it’s hot out?
Otherwise, it purrs like the kitten it is, runs 65 lbs. oil
pressure and has 160 psi compression plus or minus a couple in
every cyl (last time I checked 150 miles ago). Should I recheck
compression now looking for blown gasket? At this moment it’s
sitting in the shop puking water on the floor and is too hot to
touch. Any and all help, condolences, encouragement, and advice
will be greatly appreciated. I need to get this finished so I can
start restoration of the vette.
Thanks in advance!!
Larry–
Larry Skinner 74XJ6L 2000VDP 75VETTE RDSTR 78FERRARI308GTS
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