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Old 04-27-2021, 01:48 AM   #11
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Quote:
Originally Posted by dvdswan View Post
Does it overheat just idling or do you have to be driving?
Even on cool days I have seen it stall while idling.
I had it running for 15 minutes, then cranked on the A/C. It stalled within 5 minutes.

The cooling fan remains on all the time. Start to stall.
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Old 04-27-2021, 01:53 AM   #12
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Quote:
Originally Posted by Deerhurst View Post
CEL is basically useless on the D21 (and many other vehicles). On the D21 is only signafies an emissions issue.

I second looking for a tiny leak. It's basically one of 3 things. Too much flow, too little flow or not enough pressure to prevent boiling.

Random thought, do you have a radiator fan shroud?

I've had vehicles that overheated because of too much flow. My 99 sentra had overheating issues because water was passing through the radiator too rapidly for heat transfer due to no thermostat. I've had hot issues due to no shroud so basically no air pulled through the radiator at low speeds.

Too little flow will basically mean water is stagnant and not really moving through the radiator.
The shroud is present and in very good condition.
Thank you for the thermostat, shroud and flow insight.
Iím considering the leak test.
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Old 04-27-2021, 01:55 AM   #13
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Originally Posted by LugNut1990 View Post
AutoZone loans a "block tester" tool. Use it to check for a head gasket leak, etc. Be sure to get the special fluid that comes with the tool -- you'll need about half a little bottle of it.
Thank you.
Is this the same tool as a coolant pressure tester?
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Old 04-27-2021, 02:54 AM   #14
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No, different. It's on their website.
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Old 04-27-2021, 02:58 AM   #15
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Have you replaced the fan clutch? Never heard of a bad one causing the engine to stall but it seems you replaced everything else.



I swapped a V6 fan (extra blade compared to the 4 cylinder fan) using a V6 fan clutch on my former 93.
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Old 04-27-2021, 11:55 PM   #16
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I havenít replaced the fan clutch.
Since the fan is spinning I didnít see a need for its replacement.

Thank you all for your input.
Iíll try looking for a coolant leak with a pressure tool.

Iím thinking the Head gasket is the culprit and the engine will need to be replaced.
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Old 04-28-2021, 12:47 AM   #17
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On a cold engine it is said that a fan clutch should spin with resistance up to 3 revolutions.
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Old 04-28-2021, 02:12 AM   #18
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Grab a newspaper and get the truck warm then stick the newspaper in there. Fan shouldn't stop if the clutch is engaged. Otherwise you'll be able to stop it by hand pretty easy.
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