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Old 08-04-2019, 04:40 PM   #1 (permalink)
cptdondo
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Fan clutch “weak”?

My van doesn’t seem to be cooling very well - poor AC performance, and engine temps higher than I think they should be under load.

A local mechanic suggested that the fan clutch might be “weak” - or slipping. Note that he didn't suggest that he replace it, just mentioned it as one possible cause.

I’m not familiar with the electric fan clutches; all my cars either had electric fans or a simple mechanical fan.

Is this likely/possible?

The van has 135K miles on it.

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Old 08-04-2019, 04:45 PM   #2 (permalink)
ShopSpecialties
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The first thing I would do is a thorough cleaning of the cooling stack. It takes a fair amount of air blowing across the condenser to get good A/C performance.

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Old 08-04-2019, 04:56 PM   #3 (permalink)
cptdondo
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So.... Dumb question:

What’s the best way to clean the cooling stack? There isn’t much room to work with.
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Old 08-04-2019, 05:06 PM   #4 (permalink)
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Quote:
Originally Posted by cptdondo View Post
So.... Dumb question:

What’s the best way to clean the cooling stack? There isn’t much room to work with.
Basically it is a PITA to get it cleaned good. The best is to pull the radiator and intercooler and wash them out backwards. It is surprising how much stuff gets packed in there. To me it is one of those "while you are in there" jobs that you combine it with other things. Coolant flush, radiator hoses, belt, idlers, tensioner, etc. So if any of those things need addressed also I would do them all at once.
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Old 08-04-2019, 06:22 PM   #5 (permalink)
cptdondo
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Any idea of how many mechanic hours this might take? I don't have access to a shop anymore and it doesn't look like it's something I want to take on in a campground.....
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Old 08-04-2019, 06:38 PM   #6 (permalink)
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Quote:
Originally Posted by cptdondo View Post
Any idea of how many mechanic hours this might take? I don't have access to a shop anymore and it doesn't look like it's something I want to take on in a campground.....
I looked up on Alldata and I cannot find anything for cleaning the stack. For replacing the radiator they show 3.5 hours so maybe that will give you a ballpark idea ?
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Old 08-04-2019, 07:40 PM   #7 (permalink)
cptdondo
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Thanks. I was guessing 8 hours all in so that's in line. I'll wait until I get my new transmission cooler and then go for it.
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Old 08-04-2019, 11:52 PM   #8 (permalink)
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how hot are you getting?
your van has a mechanical fan? what electric fans are you talking about? or do you have both?
and you could try blasting a power washer through the grill to try and clean the radiator..
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Old 08-05-2019, 01:14 AM   #9 (permalink)
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how hot are you getting?
your van has a mechanical fan? what electric fans are you talking about? or do you have both?
and you could try blasting a power washer through the grill to try and clean the radiator..
Blasting a power washer through the grille could potentially make it much worse. You run the risk of folding over the fins of the trans cooler, condenser, and intercooler which all sit in front of the radiator. Also you would be pushing all the debris into each those layers.
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Old 08-05-2019, 08:19 AM   #10 (permalink)
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it is a big commitment in time, I had one radiator that was so impacted with dirt/grease I just threw it out, for less than $200 you can have a brand new one...the charge cooler is another story, they are more expensive so cleaning them is worth it, with both removed you can get to the back of the condenser and spray some detergent on it, let it soak for a bit then hose it out. on my charge cooler I have a large shallow tub that I filled with purple power degreaser and let it soak overnight.

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