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Old 06-25-2019, 10:01 PM   #51
moustacio
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Hey everyone,

It's getting warmer here so I thought I would follow up with what's going on. Not sure if my issue is solved but so far so good with my block water temperature gauge being pretty solid between 190-195*F even with a/c running close to 90*F ambient.

Since posting I have done the following:
-Cleaned/sprayed the radiator, intercooler, a/c condenser, and air cooled oil cooler again
-filled in some of the gaps to get better air flow to the radiator
-installed Saab upper radiator tee with 92*C temp switch to trigger low fan speed
-heater hoses and heater control valve

Something that I don't think came up is the possibility of a radiator hose collapsing on a hot motor with higher freeway rpm's. Am I correct to assume that the lower radiator hose to the water pump would be the one that could collapse?

Thanks again everyone for the excellent ideas and suggestions and I'll follow up again either way after summer has past. And lummert, the block temperature sensor I have is an aftermarket mechanical sensor threaded into the drain petcock below the exhaust manifold on cylinder 4. I still have the cylinder head one installed but don't know how to bypass the compensation, it just stays in the middle after warming up to temp.
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Old 06-25-2019, 10:12 PM   #52
TestPoint
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A laser thermometer might add additional bit of information. My radiator was blocked about half way up on the input tank so that it only was about half effective.
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Old 06-26-2019, 06:54 AM   #53
DET17
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Quote:
Originally Posted by moustacio View Post

Something that I don't think came up is the possibility of a radiator hose collapsing on a hot motor with higher freeway rpm's. Am I correct to assume that the lower radiator hose to the water pump would be the one that could collapse?

.
Bottom hose is indeed the "suction hose" ; old school Detroit iron used a spring inside these hoses to prevent them collapsing. Factory Ovlov hose is just reinforced more to prevent the collapse. I'd recommend the OE hose on the bottom just to be certain......
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Old 06-26-2019, 08:34 AM   #54
tryingbe
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How old is the waterpump?
How old is the radiator? What kind of radiator?

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