I have an 84 half ton chevy I use to plow with and in the winter it heats up to like 240 degrees while driving but not while sitting or plowing. You can watch the gauge climb as you drive down the road and fall at a stop sign. It has a 700r4 trans and the engine was a reman in the 90s and has about 60,000 miles on it. I have replaced radiator,water pump, fan clutch,cap, advanced and retarded timing and changed t stat 3 times and last time used a 160. Pressure tested the system and it held. No milky oil and dont seem to loose antifreeze. It does this with the plow off also. I even changed the gauge. This has been going on for 3 years now. Any ideas? Im am lost on this. Thanks for any help.
SBC overheating problem?
- Thread starter TWISTER
- Start date
novaderrik
Well-Known Member
- Joined
- May 12, 2004
a reverse rotation pump won't have the upper boss for the alternator bracket.
does the radiator cap hold pressure?
does it boil over or run like crap when it happens, or does it just read high on the gauge?
does the radiator cap hold pressure?
does it boil over or run like crap when it happens, or does it just read high on the gauge?
chopped39
Well-Known Member
- Joined
- Aug 30, 2004
The body will be right but the impeller is wrong. I have had that happen a few times. I open them before installing now. I wonder if its really getting hot. maybe sender is bad?
Id runs fine it just reads hot. New sender and gauge also. I had my wonders about the pump as someone has questioned me before about it may be bad even though its new. The radiator is new from NAPA and didnt change a thing. The engine has been together since the 90s. I am really wondering if its the pump. It will warm up to about 185 w the 160 stat in there and about 205 w the 180 stat in there also. It has a new cap but I dont remeber if I checked that or not. Thanks for all the advice. It will warm up in about 3 miles but before I changed the gauge I figured it was bad anf just drove it this summer for a 15 mile round trip for a couple of weeks and it never overheated.
Little6pack
Active Member
- Joined
- Jun 2, 2002
Make sure you have the correct radiator cap pressure. From what I have seen a wrong cap pressure can wreak havoc on the ONWER (you) about finding a soulution.
Until you get it figured out you can try popping the spring out of its lock on the backside of the fan clutch. Just pull it out of the notch and let it float there. It will cause the fan to fully engage, and pull in a lot more air. Not a fix but, should get you by for now.
Help me out on that one??? I cant tear into it yet as we have 6-8 inches of snow coming tonite.
Thats exactly what I thought it was too as I have had tractors do that. I raplaced it with a NAPA hose that didnt have a spring in ait and I put the old spring in the hew hose just in case. No luck. Im leaning towards the water pump and hope to get at it after I plow this weekend.
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