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09-25-2008, 02:23 AM
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#1 |
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Registered User
Join Date: May 2008
Location: San francisco, CA
Posts: 11
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Running Hot
1990 2500 Suburban, 7.4L/THM400/4.10s
The thermostst stuck and the burb got hot, didn't boil over shut down in time. Replaced the thermostat w/a 195*, the water pump and all hoses. I took my daughter to college this past weekend and the Burb was running warm to hot (210* straight up) Climbing The Grapevine on I-5 even with A/C off the temp climbed to 240* and the fan clutch didn't engage. I replaced the fan clutch Tuesday and still runs at 210*. Pressure tested cap and it relieved at 13p and bled down. The new Stant 16psi also relieves at 13psi but remains steady at that temp. Today I checked the timing, it was 26* advanced so I retarded to specification 4*btdc. Runs like crap so advanced back to 16*btdc. This distributor was replaced while I was on a trip. Tomorrow I will break down and replace the radiator. It's a four row. Any other thoughts? |
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09-25-2008, 05:24 PM
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#2 |
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Robert Olson Transport
 
Join Date: Oct 2002
Location: recent transplant to NC USA
Posts: 20,275
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Re: Running Hot
id have the cooling system flushed too just for laughs and make sure you havent got any blockage.. also im not sure if you have to bleed (burp) the system once you refill it
you could have your old radiator boiled out at a radiator shop instead of replacing it too . I m assuming you checked to make sure no hoses are getting kinked and slowing flow causing it to overheat and im assuming the new thermostat is actually good... ive seen more than a few come out of the box bad
__________________
Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!! |
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09-25-2008, 05:30 PM
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#3 |
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Registered User
Join Date: Oct 2005
Location: Branchville SC
Posts: 1,647
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Re: Running Hot
210 is not hot......thats about right for a 195 t-stat.....
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2004 z71, 96 z71 on 38s, 88 Chevy k5 blazer, 4in lift. 84 swb project, 82 SWB project , 84 chevy 4x4 lwb project, 88 Jimmy beater/highschool ride. 79 c30. 99 tahoe 4x4 project. and a bunch of parts trucks.. |
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