Overheating

the old man · **Posted:** Thu Aug 28, 2003 8:44 am

I'm running an internally stock 350 with a 350 trans. Radiator is a 19 x 22 aluminum one from Speedway. There is a 5 x 9 trans oil cooler in front of the radiator. Engine fan with a shroud, fan is 1 1/2 inches from rad. 180 degree thermostat, 16 lb. pressure cap, 50/50 mix of Peak antifreeze and water. It will suck a piece of paper up against the rad, so I know some air is moving.

Engine runs at 190 degrees, as long as I keep moving. After driving, if it idles for 10 minutes, it's up to 230 degrees, after 15 minutes it's boiling over.

Any thoughts on how to solve this? Thanks in advance!

John

LUVSADRAG · **Posted:** Thu Aug 28, 2003 10:04 am

check your timing.
make sure the thermostat is not stuck. you can test it by removing it and then heating up a pan of water on the stove and using some tongs to dip it in.

Has it always overheated ever since this motor was put in? Has the motor ever been rebuilt? If so, what bore is it? does it have anything over a .040" overbore?

rick james · **Posted:** Thu Aug 28, 2003 11:19 am

LOOK AT THIS LINK, http://www.hybridz.org/phpBB2/viewtopic.php?t=23422
It may be that you are not getting enough air in the shroud at low speed.

The engine compartment gets very hot because it is so closed in. It is a common problem. Check the simple stuff first, could be as simple as a stuck thermistat.

the old man · **Posted:** Fri Aug 29, 2003 11:50 am

DOH! You'd think at my age I would remember the basics. Tested the thermostat this morning and it does not even open in boiling water.

Thanks for the heads-up all you folks.

John

Blue Meanie · **Posted:** Fri Aug 29, 2003 9:24 pm

I hear ya John. It's like you feel the front end pull to the left and you start thinking of things like bent tie rods, bent a-arm, ball joint going bad. And somebody walks up to your truck and says "Hey, you got a low front tire".

800xl · **Posted:** Sun Aug 31, 2003 2:20 pm

I did that very thing when I bought my Trooper. It dragged left pretty hard and I was thinking how at the least it was going to need a trip to the alignment shop, probably some steering hardware. When I decided to air up the tires just to make sure they were all good, left front was about 15lbs low. At least I caught myself and replaced the leaky valve stem before pulling the tire off the rim looking for holes.

One trick I've heard several V8 folks on here mention is removing or cutting the middle out of the rubber hood gasket/water dam thing. (Goes across where the top of the hood hits the cowl, sort of a dam for keeping water out of the engine compartment.) With it there, the hood seals up more and does not allow much air to escape. Taking it out or at least chopping it will allow more hot air to get out from around the motor. If nothing else, you might find a HP or two from getting a cooler intake charge.

Chevyrace4x4 · **Posted:** Tue Sep 02, 2003 3:22 pm

what you might want to consider doing is instead of using an engine mounted fan is buy a dual electric fan kit that just bolts onto your radiator.

the old man · **Posted:** Tue Sep 02, 2003 3:25 pm

Does someone make a small enough dual-fan setup for a 19" x 22" radiator?

Chevyrace4x4 · **Posted:** Tue Sep 02, 2003 3:29 pm

let me take a look in some catalogs real quick. im sure they do.

Chevyrace4x4 · **Posted:** Tue Sep 02, 2003 3:37 pm

summit racing makes a dual fan setup that measures 22"x11 1/4"x4 1/8". W/ adjustable thermostat and a/c relay.....$203.95
W/O ---------------------------------------.....$173.95

Chevyrace4x4 · **Posted:** Tue Sep 02, 2003 3:40 pm

the web address is http://www.summitracing.com
the part #s are FLX-310 (#1) and FLX-320 (#2). they are made by flex-a-lite.

the old man · **Posted:** Wed Sep 03, 2003 8:40 am

Thanks for the info.
John

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Overheating

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