Fan Clutches and Radiator Fans for a 1988 Chevy C/K1500 pickup Truck with 5.7 Liter V8

Question

Question:

I have an 88 Chevy 1/2 ton 2 wheel drive pick up with a 5.7. I need to know if part numbers D17118 and D21061 are compatible with this vehicle. I have had an overheating condition during the summer months when stuck in stop and go traffic since it was new. Ifootve tried a larger radiator and replaced the fan clutch in prior years. Same problem. The only thing that helps is putting in a lower temp thermostat and that affects gas mileage when it is cool. Thanks

asked by: Rich F

0

Expert Reply:

There are a couple of different fan clutches that fit a 1988 Chevy C/K series 1500 depending on the rear axle gear ration and if it has air conditioning.

If your truck has a 3.73 or higher rear end or has air conditioning with 3.42 or higher rear end, you will need Derale Thermal Fan Clutch, # D22140. The fan mounting holes will be 10mm.

If your truck does not have air conditioning and it has 3.08 or 3.42 rear end, you will need Derale Thermal Fan Clutch, # D22142.

You will need a fan that is set up for reverse rotation. We have 4 fans for fan clutches with reverse rotation. You will need to measure the space for a fan under the hood to determine which size to use.

17 Inch Fan, # D17917
18 Inch Fan, # D17918
19 Inch Fan, # D17919
20 Inch Fan, # D17920

Another way to approach the problem you are having is to add an electric fan. Electric fans will not reduce horsepower or have nearly as much affect on gas mileage as a belt driven fan. And, if put on a switch, you could turn it on when you needed it or have it set up to turn on at a certain temperature. You are basically only limited to the space you have.

You also want to make sure that any supplemental fans are pushing or pulling air in the same direction as the factory fan. In other words, you do not want the fans to work against each other. I have included a link to our electric fans. I have also included a link to our FAQ article on electric fans.

expert reply by: Michael H

0

Answer 1

In regards to the Derale Thermal Fan Clutch with Reverse Rotation part #D22140, the distance from the mounting surface to the end of the shaft is 1-13/16" and the distance from the mounting surface to the end of the clutch is 1-3/4". I went…

view full answer...

Answer 2

It sounds like you may have a connector on your truck bed camper that's similar to a hookup for a dryer. If that's the case we definitely don't have any adapters for it and you'll likely have a hard time finding one so rewiring it to…

view full answer...

Answer 3

I reached out to Derale, who as able to confirm for me that the pilot inner diameter was 5/8 inches of the Derale Thermal Fan Clutch with Reverse Rotation #D22140.

view full answer...

Answer 4

I called my contact at Derale and asked about the spacer kit, part #D31550 for your vehicle. They told me you would not be bale to install the spacer with the clutch installed but many people remove the clutch and replace it with the spacer. They…

view full answer...

Answer 5

I've never heard of an actual third brake light connector on a camper shell to plug in on a truck and we don't carry any parts to do that. The light generally needs to be hardwired into the truck's brake light circuit. The issue with this…

view full answer...

Answer 6

I did some checking and the hub/drum we offer that will work for you is the part #8-430-5UC3. This uses the same bearings as the 8-415 and will be an exact fit aside from the fact this is a non-ABS setup and the 8-415 came in an ABS setup and non-ABS…

view full answer...

Answer 7

What you're going to need is two of the transfer switches in that case. I have attached a diagram from Furrion that shows you how you're going to need to hook the two transfer switches #F30ATS up: -one to the other, then one branching off to…

view full answer...

Answer 8

You will need the Red LED Trailer Clearance or Side Marker Light #328-K-52 or Amber LED Trailer Clearance or Side Marker Light #328-K-51 for your 2018 Forest River Sunseeker motorhome. These lenses have the same Top Command SAE-AP2-16 markings on the…

view full answer...

Answer 9

If you are needing the hub and drum assembly then you will want to go with the Dexter Trailer Hub and Drum Assembly #8-201-5UC3-EZ but if you are just looking for an idler hub then you will want part #8-213-5UC1 instead. These come with the correct…

view full answer...

Answer 10

Since Demco uses 3,500 drum brake assemblies part #DMSB24429M and #DMSB24428M what you'd need is similar 3,500 electric brake assemblies like the etrailer part #AKEBRK-35L-SA for the left hand side and #AKEBRK-35R-SA for the right hand side. To…

view full answer...

Answer 11

If your old axles have a 5 bolt brake flange the assemblies like Dexter Electric Trailer Brake Assembly - 12" - Left Hand - 6,000 lbs part #23-105 or Dexter Electric Trailer Brake Assembly - 12" - Right Hand - 6,000 lbs part #23-106 will…

view full answer...

Answer 12

I would love to help you upgrade the suspension on your Twilight 2800 travel trailer. The MORryde Rubber Equalizers for Tandem Axle Trailers #MR87ZR that you referenced are a great solution but we do need to double check a few things. First is that…

view full answer...

Fan Clutches and Radiator Fans for a 1988 Chevy C/K1500 pickup Truck with 5.7 Liter V8

Products Referenced in This Question

Product Page this Question was Asked From

Featured Help Information

Miscellaneous Media

Continue Researching