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09-07-2008, 09:53 PM
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Senior Club Cobra Member
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Join Date: Nov 2003
Location: Parker County,
Tx
Cobra Make, Engine: LoneStar LS427 , 427 Windsor
Posts: 381
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Not Ranked
I'd start by verifying the accuracy of the gauge/sender. Your description of a consistent (although high) temperature reading before the service makes me doubly suspicious of the gauge. If there are alternate locations for the sender, use the location nearest the engine side of the thermostat.
You seem to be aware of air pocket issues which may arise after any cooling system service.
If the expansion recovery tank's hot and cold levels are consistent, it should rule out a head gasket leak.
If you are using old rubber radiator hoses a "flap" from a failure of the inner lining could be restricting flow.
Keep us posted on your findings.
__________________
Jim
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A Gnat! Quick, get a sledgehammer!
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09-07-2008, 09:59 PM
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6th Generation Texan
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Join Date: Feb 2002
Location: Devil's Backbone,RR 32,
TX
Cobra Make, Engine: Lone Star Classics #240,Candy Apple Red,Keith Craft 418w - 602 HP,584 TQ
Posts: 8,157
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Not Ranked
Quote:
Originally Posted by Barnsnake
If you are using old rubber radiator hoses a "flap" from a failure of the inner lining could be restricting flow.
Keep us posted on your findings.
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A rubber hose on the suction side can also collaspe,cutting water flow.It needs to have a wire coil in it. |
09-08-2008, 03:55 AM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,291
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Not Ranked
On a different tangent..
I don't know about your 428's rebuild history.. but assuming it's a fresh rebuild it's possible to put a head gasket in backwards (180 deg out) and block the coolant flow path that brings the coolant from the block across the head, pulling the heat forward from the block and head towards the manifold outlet. This will leave you with a pretty much constant overheating problem, eventually frying that side of the motor. It's really easy to do. Ask me how I know. 
...just a thought.
Dave
__________________
Too many toys?? never!
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09-08-2008, 12:46 PM
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Senior Club Cobra Member
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Join Date: Mar 2005
Location: Meriden,
CT
Cobra Make, Engine: ERA 427 SC s/n 718, 428 FE
Posts: 1,731
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Not Ranked
Quote:
Originally Posted by 392cobra
A rubber hose on the suction side can also collaspe,cutting water flow.It needs to have a wire coil in it.
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Sure is tough to read your replies with that 'live' avatar.  |
09-08-2008, 12:50 PM
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CC Member
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Join Date: Jul 2001
Location: Senoia,
Ga.
Cobra Make, Engine: 427SO with big twin autolite inlines on custom intake, jag rear, top loader, wembeldon white, guardsmen blue stripes
Posts: 3,155
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Not Ranked
Zoe, I found if you hold your left hand up and block, it's easier to reply, even with one hand.
__________________
Perry
Remember!, there's a huge difference between a 'parts' changer, and a mechanic.
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09-08-2008, 01:02 PM
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CC Member
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Join Date: Jan 2001
Location: Fairfax Station,
VA
Cobra Make, Engine: Kirkham 427 & 289 (KMP 090 & KMPS 040) and need a Kirkham GT-40
Posts: 39
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Not Ranked
Double check your timing too. Bert
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09-08-2008, 06:02 PM
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CC Member
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Join Date: May 2003
Posts: 1,313
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Not Ranked
I have a Lonestar and have had similar problems. I totally agree on burping the system. Get the front several feet higher than the back, as high as you can, then fill the system. Suggest the temp guage is not accurate which may be due to a bad voltage reference. If you don't have a 100 amp alternator, get one. This will keep the fan running full speed at all times. The high output coils and fans we run can easily pull down the electrical system on anything less.
Good luck.
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