What's new
CK5
Register an account today to become a member! Once signed in, you'll be able to participate on this site by adding your own topics and posts, as well as connect with other members.

overheating issue

So it is like -11 here with the windshield today, after driving for about 10 miles it start creeping over 210..220....230... and then I lowered the blade and slowed down my speed to get it under the 210 mark again. I did not make the change to the clutch as you mentioned in your above post as I had already had it installed.

Both upper and lower hoses are at temperature as you would expect, the radiator is flowing really well, so I guess this is really got to be a air flow issue. If the water pump was going bad internally, I would not believe I would see the amount of flow that I see when the cap is off. The line from the heater core to the radiator is flowing a solid 7/8 stream like no other.
 
Hmm. Since it's so cold, I wonder if the issue is that the ambient air temp is keeping the thermostatic spring on the clutch colder than the engine actually is?

Not much explanation otherwise, the clutch should be locked up solid as the engine temp goes up. Wonder what the fan clutch feels like (temp-wise) if you shut it down and immediately check?

Not sure how any of this would work, the engine is overheating, thus the radiator has to be shedding more heat, one would think that to be enough to heat the fan clutch up. Perhaps the plow disrupts flow through the radiator opening so much that air doesn't make it back to the clutch as it would in a normal setup.
 
Justin Fleming said:
So it is like -11 here with the windshield today, after driving for about 10 miles it start creeping over 210..220....230... and then I lowered the blade and slowed down my speed to get it under the 210 mark again. I did not make the change to the clutch as you mentioned in your above post as I had already had it installed.

Both upper and lower hoses are at temperature as you would expect, the radiator is flowing really well, so I guess this is really got to be a air flow issue. If the water pump was going bad internally, I would not believe I would see the amount of flow that I see when the cap is off. The line from the heater core to the radiator is flowing a solid 7/8 stream like no other.
Click to expand...
The outside temp does not affect the fan clutch. If the radiator temps go above the temp that the clutch is set to engage, then it will engage..... it's sitting right behind the radiator. Do not mess with your clutch. It should work properly out of the box and needs no adjusting. If it's bad out of the box and you F with it, your warranty just went up in smoke.

Now, couple things to check. When you get it up to 220-30*, pop the hood and feel if there is air blowing from the back side of the fan. (you should feel a ton of air being blown on the engine by the fan even at idle) if it is than your fan clutch is locked, also when you rev the engine up at those warm temps, you should be able to hear the fan roar. If you can't hear it roaring at all, it's not locked up.

2nd issue. It's -10 where you are at. Thats flippin' cold. Lets keep in mind something, your truck is designed to stay below 220* in 100* heat, with the A/C on, while pulling a mountain pass. Snow plow or not, you're cooling system should be able to keep up without the fan even hardly having to come on in that kind of cold azz temp.

Find out if your fan clutch is actually working or not and report back. If it is, then I still say you have a stat that is only slightly opening or you have a defective radiator. The way to tell the difference there is when it is "hot" jump out and feel the bottom radiator hose. If it's cool to warm, then youre stat is not opening properly. If it's flippin' hot, then the radiator is amazingly not keeping up and is plugged up.
 
It will have to waiting to probably Sunday before I get back over to the truck. Thank you for the suggestions and I will report back what I find out.


thanks
 
So finally getting back into the truck tonight as we had a snow storm. Well I get the truck super hot and jumped out and both the upper and lower hoses are hot. I do not seem to hear the fan roaring noise. I remember on another truck I had when you first started the truck up for a few seconds you would hear that thing roar like crazy and I do not seem to get that with the currently new fan or the old one that was taken off. I almost don't believe it is locking up...
 
YES! You should here the roar of the fan when it's first started, and when it becomes fully engaged as temps rise, it gets loud. The fan in my K30 is pretty noisy and there is no mistaking what it is when it's on. Even with how cold it is there, that plow must really block the air flow.

Another cheap trick you could try, take the plow off if it's easy and go for a drive. Surely, even if that fan isn't working, that cold of air coming in with no wind blockage should easily keep that engine cool.
 
Justin Fleming said:
So finally getting back into the truck tonight as we had a snow storm. Well I get the truck super hot and jumped out and both the upper and lower hoses are hot. I do not seem to hear the fan roaring noise. I remember on another truck I had when you first started the truck up for a few seconds you would hear that thing roar like crazy and I do not seem to get that with the currently new fan or the old one that was taken off. I almost don't believe it is locking up...
Click to expand...

When it's cold, engine off of course, is the fan hard to turn? Can you feel the resistance of the viscous fluid? Doesn't indicate it's working right otherwise, but if it's not hard to turn cold, it's garbage.
 
You must log in or register to reply here.

Latest Posts

Top Bottom