Temp Gauge working? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

jdaley · 01-02-2010, 03:49 AM

I have just done an 800km trip with the new toy.
Aproblem has arisen, the temp gauge does not appear to be working and I have blown the hesd gasket.
How do I check the temp. gauge?
I have a new gasket set arriving are there any further problems I may encounter from thsi one. I dont expect a warped headis that a fair assumption?

SliverBlack86 · 01-02-2010, 07:47 AM

Quote:

Originally Posted by jdaley

...
Aproblem has arisen, the temp gauge does not appear to be working ...
How do I check the temp. gauge?
...

If you have no sensor and, or wiring problems use an infrared temp gun aimed at the area around the sensor and compare it with the gauge. because the gun is sensing metal temp while the sensor is sensing the coolant temp the two reading will not be the same, but should give you an idea of the gauge accuracy. Remember this is quite an old gauge expect its accuracy to have deteriorated.

jdaley · 01-02-2010, 07:18 PM

Can I expect any other damage as a result of the overheating?
Some engines just cannot take a single overheat, such as aluminium heads.

SliverBlack86 · 01-02-2010, 11:42 PM

How long did you run the engine hot till it blew the gasket? Or, did it overheat rapidly and blow immediately?
Which cylinder(s) blew 3,4, 5, or 6?
Most likely bearing failure if the proper precautions were not taken to flush any coolant in the oil.

68 TT · 01-03-2010, 11:17 AM

If you overheated it enough that it blew a head gasket you really need to take it apart and have a machine shop check for flatness on the deck and heads as well as inspect for cracks.

You also probably overheated the rings and caused them to lose a little tension so it will probably smoke more now if you don't replace them.

Take this as an opportunity to freshen up the engine and re-seal the whole thing. You are going to have it 75% of the way disassembled so why not finish the job. Rings and bearings are cheap.

ironroad9c1 · 01-03-2010, 11:24 AM

Quote:

Originally Posted by 68 TT

If you overheated it enough that it blew a head gasket you really need to take it apart and have a machine shop check for flatness on the deck and heads as well as inspect for cracks.

You also probably overheated the rings and caused them to lose a little tension so it will probably smoke more now if you don't replace them.

Take this as an opportunity to freshen up the engine and re-seal the whole thing. You are going to have it 75% of the way disassembled so why not finish the job. Rings and bearings are cheap.

Couldn't agree more... you will be pleased with the fresh engine.

73step · 01-03-2010, 02:18 PM

if your going to pull the heads your better off pulling the whole motor and freshening it up. Here is a cheap way to go over everything http://www.summitracing.com/parts/FEM-MK630C-000/

jdaley · 01-03-2010, 05:30 PM

THanks, but summit dont seem to have kits for 6 cyl 292's.

73step · 01-03-2010, 10:15 PM

sorry bud i didnt think as to what was under your hood

01-02-2010, 03:49 AM	#1
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Temp Gauge working? I have just done an 800km trip with the new toy. Aproblem has arisen, the temp gauge does not appear to be working and I have blown the hesd gasket. How do I check the temp. gauge? I have a new gasket set arriving are there any further problems I may encounter from thsi one. I dont expect a warped headis that a fair assumption? __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars

01-02-2010, 07:18 PM	#3
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Temp Gauge working? Can I expect any other damage as a result of the overheating? Some engines just cannot take a single overheat, such as aluminium heads. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars Last edited by jdaley; 01-02-2010 at 08:41 PM.

01-02-2010, 11:42 PM	#4
SliverBlack86 Registered User Join Date: Oct 2009 Location: Houston, Texas Posts: 8	Re: Temp Gauge working? How long did you run the engine hot till it blew the gasket? Or, did it overheat rapidly and blow immediately? Which cylinder(s) blew 3,4, 5, or 6? Most likely bearing failure if the proper precautions were not taken to flush any coolant in the oil.

01-03-2010, 11:17 AM	#5
68 TT Still plays with trucks Join Date: Jul 2009 Location: Spokane, WA Posts: 3,556	Re: Temp Gauge working? If you overheated it enough that it blew a head gasket you really need to take it apart and have a machine shop check for flatness on the deck and heads as well as inspect for cracks. You also probably overheated the rings and caused them to lose a little tension so it will probably smoke more now if you don't replace them. Take this as an opportunity to freshen up the engine and re-seal the whole thing. You are going to have it 75% of the way disassembled so why not finish the job. Rings and bearings are cheap. __________________ miSSed opportunity - ground up creation of an AWD 1994 454 SS that never was http://67-72chevytrucks.com/vboard/s...d.php?t=795577 69 C10 shortbed stepside 400 small block - built like what a super sport truck could have been 69 K20 lwb TBI 350 4L60E NP208 14-bolt Dana-44 w/disc 68 Camaro SS / RS 500hp 439 inch roller cam big block 4L80E 79 Malibu TPI 350 4L60 w/ Z28 steering & sway bars

01-03-2010, 02:18 PM	#7
73step Registered User Join Date: Apr 2009 Location: hurlock md Posts: 82	Re: Temp Gauge working? if your going to pull the heads your better off pulling the whole motor and freshening it up. Here is a cheap way to go over everything http://www.summitracing.com/parts/FEM-MK630C-000/

01-03-2010, 05:30 PM	#8
jdaley Registered User Join Date: Dec 2009 Location: Melbourne, Australia Posts: 71	Re: Temp Gauge working? THanks, but summit dont seem to have kits for 6 cyl 292's. __________________ John Daley Melbourne, Australia 1946 Chev Ute 1977 Chev Tray Road racing sidecars

01-03-2010, 10:15 PM	#9
73step Registered User Join Date: Apr 2009 Location: hurlock md Posts: 82	Re: Temp Gauge working? sorry bud i didnt think as to what was under your hood



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