93 GMC 1500 4.3 running a little hot after it gets off the highway...

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Apr 1, 2020 | 6:21 PM

#11

Gumby22

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Joined: May 2011

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From: Central Iowa

Quote:

Originally Posted by ericfx1984

1.) coolant res is good

2.) haven't checked like that, but i will tell you that it rips apart a small stick if it's idling and warm

3.) oil and trans fluid are great

4.) Lisle, yes and it works great on other errrr... other projects

Check the fan clutch as I described and see what the result is. They work on thermal principle - the hotter it is, the more “grip” it should have.

You could also try opening the hood once it’s hot and shutting off the engine - if the fan continues to spin on its own, it needs replacement.

Apr 2, 2020 | 8:23 AM

#12

ericfx1984

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Quote:

Originally Posted by kevinkpk

0 resistance means it is toast.

Yes I know that... that is why I replaced it with one my next door neighbor had laying around...

Apr 2, 2020 | 8:25 AM

#13

ericfx1984

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Quote:

Originally Posted by Gumby22

yeah i get the idea, the engine hotter it gets, the more heat gets transferred to the fan clutch, the more it locks up... when it's crazy hot it should be darn near like having a solid mounted fan... when you just fire it up and it sat for 3 days in -15F weather it should have little resistance

Last edited by ericfx1984; Apr 2, 2020 at 8:29 AM.

Apr 2, 2020 | 8:30 AM

#14

kevinkpk

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From: kevinkpk

Quote:

Originally Posted by ericfx1984

Yes I know that... that is why I replaced it with one my next door neighbor had laying around...

Did your neighbors vehicle have air conditioning? The older models, like my 70 olgs has two different fan clutch applications, and I am NOT sure about a 93.

Apr 2, 2020 | 9:10 AM

#15

ericfx1984

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Quote:

Originally Posted by kevinkpk

Did your neighbors vehicle have air conditioning? The older models, like my 70 olgs has two different fan clutch applications, and I am NOT sure about a 93.

I never considered that... my money is on the fan/clutch