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05-20-2011, 10:51 PM
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#1 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Overheating?
My new 88 TBI 350 overheats when it idles more than 5-10 minutes. How do I fix it? I DO plan to replace the thermostat in the next week or so, what thermostat should I get?
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~Bradley~ 2004 Black GTO LS2/T56 too much to list  Miss having a truck 
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05-21-2011, 09:24 PM
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#2 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
Bump
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-21-2011, 10:20 PM
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#3 |
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Registered User
Join Date: Nov 2010
Location: Windsor Locks
Posts: 628
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Re: Overheating?
What kind of fan do you have? I put a stock clutch fan back in my truck that came with a flex fan. found out the hard way that the clutch is shot and it will over heat at idle if its left running for more than 5 or 10 mins. Its fine when driving though so I still haven't got around to replacing the bad clutch.
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05-21-2011, 10:22 PM
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#4 |
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Registered User
Join Date: Apr 2011
Location: Just outside Sin City
Posts: 239
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Re: Overheating?
I'd stick a 160 stat in it, and then try it. Go from there, if your still having problems.
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Bruce 73 Stepside, 74 Blazer, 75 1 Ton, 66 Barracuda and a 05 Electraglide DD http://i56.photobucket.com/albums/g1...Rusti192-1.jpg |
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05-21-2011, 11:50 PM
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#5 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
Thanks so much guys, It's been so long since I owned something that was restored! :P I forgot how stuff works!
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-22-2011, 10:17 PM
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#6 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
Should I get a Severe Duty Fan clutch? It gets up to 105* here in the summer.
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-22-2011, 10:27 PM
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#7 |
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Registered User
Join Date: Apr 2011
Location: Just outside Sin City
Posts: 239
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Re: Overheating?
I would change the stat first, It sounds like it is your main problem. Them see what you need to do for the Summer weather. In Vegas it gets up in the 120's. My solution is, NO thermostat, a flex fan, and change the antifreeze the beginning of every Summer. So far no problems with overheating. I use the t-stat housing with the plunger cut out.
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Bruce 73 Stepside, 74 Blazer, 75 1 Ton, 66 Barracuda and a 05 Electraglide DD http://i56.photobucket.com/albums/g1...Rusti192-1.jpg |
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05-22-2011, 10:32 PM
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#8 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
I have never changed a thermostat(never needed to). How long would it take? Do I need any special tools? Any gaskets? How involved is it? Is there a good brand? What material? Stainless? Copper/steel? Copper/brass? Steel?
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-22-2011, 10:42 PM
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#9 |
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Registered User
Join Date: Apr 2011
Location: Just outside Sin City
Posts: 239
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Re: Overheating?
It easy to change, a ratchet and socket, gasket ant a new stat.Put the new one in boiling water first and make sure it opens. Just watch how the old one comes out and put the new one in the same way.
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Bruce 73 Stepside, 74 Blazer, 75 1 Ton, 66 Barracuda and a 05 Electraglide DD http://i56.photobucket.com/albums/g1...Rusti192-1.jpg |
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05-22-2011, 10:48 PM
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#10 |
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Registered User
Join Date: Aug 2010
Location: White City, SK
Posts: 411
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Re: Overheating?
You're talking two bolts .... easy peasy
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05-22-2011, 10:49 PM
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#11 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
Sweet! Will there be any mess?
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-23-2011, 12:20 AM
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#12 | |
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Conversion Truck Addicted
Join Date: Sep 2009
Location: Denmark, Europe
Posts: 1,548
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Re: Overheating?
easy yes, a mess yes
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Thomas Quote:
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05-23-2011, 12:29 AM
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#13 |
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Registered User
Join Date: Aug 2010
Location: White City, SK
Posts: 411
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Re: Overheating?
Just drain a gallon of coolant out before you pull the thermosat housing off. There won't be much mess.
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05-23-2011, 01:35 AM
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#14 |
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Registered User
Join Date: Feb 2009
Location: washington the state
Posts: 730
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Re: Overheating?
if its only over heating when its at idle its not your T stat its you clutch fan
if it was your thermostat it would over heat when your going down the road because the thermostat will stop all water circulation as were a fan not spinning at idle wont pull enough air through the rad to cool the slow circulating water and if you still think you need a thermostat dont put a low temp one in like a 160' keep a 190' in it the lower temp stat will screw with the ECM on a tbi engine and you'll fight to get it to run right
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my sports car rolls on six wheels only because I'm to fat to get in and out of new corvette http://hubgarage.s3.amazonaws.com/ph...ped_detail.JPG |
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05-23-2011, 01:50 AM
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#15 |
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Registered User
Join Date: Dec 2009
Location: Epping, NH
Posts: 605
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Re: Overheating?
anybody else worried about his water pump? I agree with the clutch fan diagnosis, but I'd question the water pump too, it's old enough to go.
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1982 Chevy K30 CCLB fleetside. Formerly a cab and chassis, now a fleetside dually with the rear wheels tucked underneath. 454/th400/np205/C14/D60, 6/4 inch LIFT, not drop. |
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05-23-2011, 09:26 AM
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#16 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
I was actually thinking it might be good to buy the pump, clutch, and t-stat. Especially because I dont know what she'll do when towing in 100* heat.
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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05-23-2011, 10:19 AM
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#17 |
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What Hump?
Join Date: Apr 2003
Location: New River AZ
Posts: 2,009
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Re: Overheating?
I would I agree about the clutch but also check your radiator, when was the last time it was flushed? Here in Phoenix it is usally the first thing I always check.
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Lil red 86 c-10 99 Sub 78 Camper Special w/ 454 |
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05-23-2011, 11:52 AM
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#18 |
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Registered User
Join Date: Aug 2010
Location: White City, SK
Posts: 411
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Re: Overheating?
This is all good advice. Also, it never hurts to throw a timing light on it as retarded timing will cause it to overheat.
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05-23-2011, 03:49 PM
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#19 |
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Resident of Here
Join Date: May 2008
Location: Wesley Chapel, FL, USA
Posts: 7,716
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Re: Overheating?
Thanks guys. Idk when it was last flushed, probably within the last 2 years as it was a rescue truck.
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~Bradley~ 2004 Black GTO LS2/T56 too much to list Miss having a truck
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