Stare at your fan while engine running and temp gauge showing over 1/2
now turn off engine
how many times does it keep going around?
now turn off engine
how many times does it keep going around?
Post head repair worries
- Thread starter frogish
- Start date
it is a lot,
i do have a 9 blade red fan with viscous,
when i come back after a trip i always check the engine, fluids, gauges, etc, then i stop the engine
fan gives 0 revolutions, i would say that it stops immediately, maybe 15º (over 60º a full turn)
love that tester,
have you read the instructions very carefully ?
i recall it was a bit complex,
i.e., your reservoir overspill hose is not closed, may be it will have some relevance?
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Hmm, will close that of and try again!
Also Thanks everyone for all the input, appreciate it.
still got blue smoke?
<snip>
Dang double post
Dang double post
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No, blue smoke is gone.
here it is the test:
And while DQ looks for cracks his wife upstairs keeps looking for the Listerine...
Are bubbles good or bad?
Hmm, the bottom cup is not supposed to be filled on my tester, if I understand my manual correctly. It leaves a lot to ask. Perhaps that can affect the result Also? Attaching a hose to the overspill and leading it away from the car actually improved the result a bit.
bubbles are required, in essence you are suctioning the air from the reservoir, if that air contains an excess of co, the blue fluid, aka listerine turns to green,
the first portion is control, the second is the test
if the first turns green not problem, the second is the key
you need both cups with fluid to the level in my setup
Interesting, so the theory is that a cracked head allows exhaust into the coolant? I guess that makes sense as after combustion the pressure is maximal.
In retrospect I remember my Volvo 240, by the time it reached 250 kmiles on the original engine, you could see the plastic expansion tank expand with exhaust pressure...
A little update. Installed a new fan clutch and a new cap on the reservoir and Also drained all of The coolant and replaced it. However, at temp 3o clock still the fan does not stop immediately. All hoses are warm. According to my laser about 170F. Lower rad hose is 130F.
It is much better now, the temp needle went slightly over 3oclock, perhaps a millimeter or two once but nothing more.
The fan clutch kind of puzzles me though. Also my radiator do get warm so I'm fairly confident my Tstat is opening but who knows
It is much better now, the temp needle went slightly over 3oclock, perhaps a millimeter or two once but nothing more.
The fan clutch kind of puzzles me though. Also my radiator do get warm so I'm fairly confident my Tstat is opening but who knows
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Remove your tstat and check and report temps
drill your tstat before reinstalling
laser test your radiator- look for cooler center.
drill your tstat before reinstalling
laser test your radiator- look for cooler center.
AFAIK the needle measures coolant temperature at the engine, not coolant temperature outside the engine, be it in the radiator or the reservoir. Having said that needle at 1/2 is about 90 C I read.
96 C at the reservoir feels a bit too high if you want the engine to operate around 93 C...
You can look at this in different ways…..
measure the water temp at the tstat housing where the water exits the head.
replace the water temp sensor for new.
did you replace the tstat?
did you drill it?
did you aim it?
measure the temp of the radiator with the laser in the core- not in or out but at the center.
how old is the radiator?
did you bleed the system?
measure the water temp at the tstat housing where the water exits the head.
replace the water temp sensor for new.
did you replace the tstat?
did you drill it?
did you aim it?
measure the temp of the radiator with the laser in the core- not in or out but at the center.
how old is the radiator?
did you bleed the system?