The progressive linkage comes factory on mine and I like it
CK5
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'89 R3500 Crew Cab 2wd to 4wd conversion & beyond
- Thread starter mrk5
- Start date
Started out with 2wd TBI350 with SM465 to current 4wd with 454, 700r4, NP241
I did not like progressive linkage on mine. Made it move like a slug.
Not the 8100 pounds and slushie maker?The brand of EFI has SO much to do with these statements.
Nah, I won't harass him about driving a portly truck, but I gotta watch for ways to return the fun for all of the "broflo" comments.
shocking I know, just like the new Delco381 pump that failed on me.
Just like @ZooMad75 said about his truck and Larry's truck and such, I'm also running a 6.2l radiator and shroud in my V3500 tow rig. And I too am just running a mechanical fan clutch with a big block mechanical fan. I put a 9 blade fan on to try and push as much air as possible and have a 180* thermostat too. All I know is I've towed with that truck a bunch over the last couple years and no matter what have not yet tipped the 200* mark. Even when towing the below setup which was the heaviest I've done with it (and the heaviest it'll probably ever see) at an estimated +/-18k GVRW, the 8.1 liter never got above 195*. So I couldn't be happier with it.
I've always been under the understanding that if you are gonna tow at all with your rig, then a mechanical fan is the only way to go.
I've always been under the understanding that if you are gonna tow at all with your rig, then a mechanical fan is the only way to go.
Where'd you get the fan?
I think I got it on rock auto...but that was multiple years ago and don't remember. But it's the same things as this:
https://www.summitracing.com/parts/...MIwavYw_by6gIVTfDACh0OdQBCEAQYAyABEgLP4vD_BwE
I was trying to find application specific on RockAuto and Summit with no luck; for example fans for 1985 K30 with a 454 or 6.2L. I guess I can't use the same fan as you because of the reverse rotation issue.
I did find a new 6.2L shroud from HillbillyWizard.com and he also has 6.2L fans. I'm thinking I could start with that plus an severe duty fan clutch for the same.
My biggest reluctance for the mechanical fan has been the possibility of issues on the trail. I'm hoping that won't be a problem with the severe duty clutch.
I was also dubious about the benefits of mechanical until driving the C10 with AC and an heavy duty fan clutch. I always thought that over about 30mph the fan didn't provide additional air flow. However, I noticed on at least 1 occasion in the C10 I was going 50-65 last summer with the AC going and when engine temp hit about 190, I heard the fan come on as the clutch engaged and I saw the engine temps drop. I realized then maybe I was wrong about how much air flow the fan could create. But I did still notice sitting at idle with the AC on, the temps would start to creep up until I started moving again which increased RPM and again allowed the fan to draw more air.
I think it goes to show that it's a least a little unrealistic to expect 1 system to adequately serve all engines and vehicles.The brand of EFI has SO much to do with these statements.
Scott-. I totally get the fear of cooling in trail situations. Prior to my upgrade to the 6.2 radiator I had the problem while wheeling. Just didn't have enough cooling unless I got the engine running faster or actually moving faster for natural airflow. That sucked for sure.
But after the swap I can crawl to my heart's content in hot weather and the engine still stayed cool. I think in '18 when we did the Mojave road it was 110° or more and we were going slow up to Ft. Paiute and my temp gauge actually hit 200°. But no sooner did I see the gauge when I heard the fan clutch come on and temps dropped again.
The HD clutch is the key component. Yep it robs HP, but it engages sooner and stays locked up until the airflow through the radiator drops enough temp to allow it to disengage. There is no mistaking it being on either. Mine and Larry's are loud. Like loud enough to notice the noise isn't there you better look at the engine temp.
My experience is positive that the mechanical stuff works. It's worth noting that even the new Duramax diesels still come with mechanical driven fans. I'm guessing they don't have electric fans that can keep up with the airflow requirements that those engines need.
I say that just to show that mechanical drive fans still get used today in modern trucks because they still work better in heavy duty applications where they are not trying to maximize fuel economy like they are in the 1/2tons where they only use electric fans.
I know that's how the HD clutch was in the C10; you knew when the clutch was engaged. I've been reluctant to put AC on the crew cab due to cooling concerns, so I'm hoping maybe the mechanical will help with that as well.
It's the same with big rigs as well.
They do however have a computer controlled electric clutch.
The last 3 generations of Duramax engines run electric controlled fan clutches too.
Most of the time we were driving around in the Pathfinder. We probably passed each other and never knew it.
So I can get a severe duty clutch for a 6.2L: https://www.rockauto.com/en/moreinfo.php?pk=815273&cc=1053100&jsn=2514
Or for a 454: https://www.rockauto.com/en/moreinfo.php?pk=815331&cc=1053111&jsn=2516&jsn=2516
All the specs are exactly the same. I'm thinking maybe the only difference would be its ability to handle higher RPM in the 454 version, so I should probably go that route.
Or for a 454: https://www.rockauto.com/en/moreinfo.php?pk=815331&cc=1053111&jsn=2516&jsn=2516
All the specs are exactly the same. I'm thinking maybe the only difference would be its ability to handle higher RPM in the 454 version, so I should probably go that route.
Nah get the diesel one..... cuz you have a diesel.........
Perty sure the clutch fan I used came off a 6.2
