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

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…

view full answer...

Answer 2

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 3

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 4

A 4-Way trailer connector has the basic lighting functions only; running lights, left turn signal and brake lights, right turn signal and brake lights, and ground. A 7-Way has these functions and a 12 volt circuit, a circuit for electric trailer…

view full answer...

Answer 5

The difference between the Class II and Class III hitches has to do with their Gross Trailer Weight (GTW), their Tongue Weight (TW), and their Hitch Receiver Size. Class II trailer hitch receivers have a 1-1/4 inch receiver and can be rated up to…

view full answer...

Answer 6

In order to determine the torque rating for the lug nuts on your trailer you will need to know check out the chart I attached that shows all of the torque specs for all the trailer lugs available based on stud size, wheel material and wheel size.

view full answer...

Answer 7

If you just need a 4-pin to 7-pin trailer wiring adapter, then you can use part #C57672. This will plug into the 4-pin trailer connector on your brother's vehicle and give him the 7-pin socket for the trailer. Keep in mind, this will only give…

view full answer...

Answer 8

Lance does have a proprietary plug, but many customers see a standard 6-way or 7-way round and notice it doesn't fit their factory 7-way as well. I've attached an article to help if you have one of the 7-way or 6-way round connectors which we…

view full answer...

Answer 9

The difference between an load range C and load range D tire in the same size is the capacity and psi rating. The two tires will still have the same dimensions and fit on the same wheel. The D rated tire has a higher capacity. For a ST175/80D13 like…

view full answer...

Answer 10

The OEM prep package consists of 4 "pucks" in the bed of the truck that will allow you to drop in puck style hitches for easy installation and removal, that gives you a completely clear bed when not in use. The B&W Companion OEM 5th…

view full answer...

Answer 11

Load range B trailer tires are going to have a lower capacity than C load range tires. Basically that, psi rating, and the ply rating are the only differences. A higher load range tire would last a little longer than lower load ranges of the same…

view full answer...

Answer 12

Since wire color codes are NOT universal, we always recommend wiring by function, rather than wire color. If you look at the Trailer Wiring FAQ article I have linked you to, you can see some diagrams showing the proper way to wire a vehicle and…

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