Boiling over....... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Matt Man · 09-01-2016, 05:54 PM

Are you running a fan clutch? If you do have one is it in good shape? Would be a good time to upgrade to a 5 or 7 blade fan with a new fan clutch.

tucsonjwt · 09-01-2016, 07:29 PM

x2 on fan clutch. See if the clutch is turning the fan when the engine is hot and at idle. You could also have a bad water pump - look under the truck to see if you have a trail of rusty water from the weep hole at the bottom of the water pump. That rusty trail indicates a failed water pump.

I would only use a AC Delco fan clutch if you need one - about $100 at the oem vendors, the last time I checked:

www.oewarehouse.com
www.oehq.com
www.davesauto.com
www.gmpartsdirect.com
www.rockauto.com

Get the GM part number for the clutch and search Amazon and Ebay also.

Sand85 · 09-02-2016, 02:09 PM

Quote:

Originally Posted by tucsonjwt

x2 on fan clutch. See if the clutch is turning the fan when the engine is hot and at idle. You could also have a bad water pump - look under the truck to see if you have a trail of rusty water from the weep hole at the bottom of the water pump. That rusty trail indicates a failed water pump.

I would only use a AC Delco fan clutch if you need one - about $100 at the oem vendors, the last time I checked:

www.oewarehouse.com
www.oehq.com
www.davesauto.com
www.gmpartsdirect.com
www.rockauto.com

Get the GM part number for the clutch and search Amazon and Ebay also.

I happen to change the water pump and the alternator at the same time because it had a dead battery but that's a different issue. I figured I was there already why not, lol!

Thank you for the links I will be and have looked at some of them.

Sand85 · 09-02-2016, 01:50 PM

Quote:

Originally Posted by Matt Man

Are you running a fan clutch? If you do have one is it in good shape? Would be a good time to upgrade to a 5 or 7 blade fan with a new fan clutch.

The truck didn't come with one and so I was under the assumption that it didn't need one, plus it has this aluminum shaft that bolts on to the belt pulley.

ultrahd4me · 09-02-2016, 01:59 PM

I agree with the others. Get a heavy duty fan clutch and the correct fan shroud and you will be running cool.

09-01-2016, 05:54 PM	#1
Matt Man Registered User Join Date: Oct 2009 Location: Buhl, Idaho Posts: 1,438	Re: Boiling over....... Are you running a fan clutch? If you do have one is it in good shape? Would be a good time to upgrade to a 5 or 7 blade fan with a new fan clutch. __________________ 86 c30 crew cab dually 454/400 4/6 drop SOLD 1-8-11 1981 chevy K10 short Bed Scottsdale SOLD 10-26-2020 67 GMC Stepside Straight six/3 on the tree "The Peach" 2020 Silverado Double Cab LT Z71 5.3 8 speed Daily Driver K10 build http://67-72chevytrucks.com/vboard/s...d.php?t=671934 The Peach build http://67-72chevytrucks.com/vboard/s...d.php?t=733903

09-01-2016, 07:29 PM	#2
tucsonjwt Registered User Join Date: Jul 2007 Location: Tucson, AZ Posts: 3,198	Re: Boiling over....... x2 on fan clutch. See if the clutch is turning the fan when the engine is hot and at idle. You could also have a bad water pump - look under the truck to see if you have a trail of rusty water from the weep hole at the bottom of the water pump. That rusty trail indicates a failed water pump. I would only use a AC Delco fan clutch if you need one - about $100 at the oem vendors, the last time I checked: www.oewarehouse.com www.oehq.com www.davesauto.com www.gmpartsdirect.com www.rockauto.com Get the GM part number for the clutch and search Amazon and Ebay also.

09-02-2016, 01:59 PM	#5
ultrahd4me Registered User Join Date: Dec 2006 Location: Gallatin, Tn Posts: 676	Re: Boiling over....... I agree with the others. Get a heavy duty fan clutch and the correct fan shroud and you will be running cool. __________________ Follow me on Instagram: @midtennc10 Youtube channel: Midtennc10



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