Vette Registry | Engine overheating - Page 2 - Forums

I did notice today that my glass fuel filter at the carb is never full and fuel flow only seams to be a small squirt every so often. I have already ordered a new fuel pump as mine does look to possibly be original. I will also borrow a timing light to see what the timing is set at. The engine has always run very good. thanks for the help, I will let you know what i find.

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Re: Engine overheating

Posted: 6/14/17 6:12pmMessage 13 of 18

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Tomtall

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Joined: 3/5/2016

Posts: 43

Vette(s): 1973 Coupe -- 454 / 4 speed - Black on Black, Greenwood aftermarket turbo hood, Greenwood GTO style front bumper.American Racing Vector rims.

Fan shroud in place ? Ignition Timing correct ? Collapsed radiator hose ? Slipping water pump belt ?

|UPDATED|6/14/2017 6:12:32 PM (AZT)|/UPDATED|

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Re: Engine overheating

Posted: 6/15/17 12:17amMessage 14 of 18

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stingrayjim jr

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SHELBYVILLE, TN - USA

Joined: 7/5/2002

Posts: 3944

Vette(s): 1976 L48 auto

1978 L82 4speed

1994 LT1 6speed

Toplander. You might have an air bubble in the system....try running it with the cap on loose and see if there is a difference.... and besides the lower radiator hose, you might have a water pump issue.?? Hopefully it isn't a head gasket....

And the fuel filter, mine does that too, i have one of the glass type filters with the replaceable filter. Using an electric holley blue pump it doesn't fill up either, but it gets fuel, so, all that really matters :)

|UPDATED|6/15/2017 12:17:30 AM (AZT)|/UPDATED|

StingrayJim
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Stingray's '76�� StingrayJr's '78��Lil Red '94

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Re: Engine overheating

Posted: 6/15/17 5:42pmMessage 15 of 18

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gtr1999

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CHESHIRE, CT - USA

Joined: 5/2/2016

Posts: 66

Vette(s): 1969 350 4 spd drop top 1972 350 auto coupe

Hi Guys

Just one thing, please get rid of those glass inline filters those are very risky, if they break you have a fire.

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Re: Engine overheating

Posted: 6/15/17 5:50pmMessage 16 of 18

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Dblancha79

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Weatogue, CT - USA

Joined: 6/29/2015

Posts: 102

Vette(s): 1979 C3 L82 383 cu in

Thanks all for ideas. I think I found the issue. The air dam was flopping so I wired it open awhile ago to get max air in the engine compartment that gets so hot. When the car idles I think the engine fan pulls air from the open air dam vs through the radiator. Also when I installed the aluminum radiator the fan shroud doesn't fit tight to the radiator. I'm in the process of buying rubber seals to add to the shroud. I also don't think the new temperature switch I bought some time ago works right. I put it in boiling water but can't get an ohm reading through it. I may just wire the electric fan to a switch as suggested as I know the electric fan works if you get 12 volts to it.

Thanks everyone.

"Made to be run hard"

Simsbury, Ct.

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Re: Engine overheating

Posted: 6/18/17 6:48pmMessage 17 of 18

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Toplander

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Athens, IL - USA

Joined: 7/13/2016

Posts: 3

Vette(s): 1975 coup 4speed leather interior. Silver with oxblood interior

My car was definitely running lean because of a weak fuel pump. after replacing the fuel pump the filter remains full and performance is much better, as far as temp goes todays test drive it ran 205 degrees, although the air temp was only 80 compared to 95 when it was running 230 plus. I will still check timing and try with rad cap loose to see what happens. thanks again for all the help.

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Re: Engine overheating

Posted: 5/19/19 2:51pmMessage 18 of 18

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Dblancha79

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Weatogue, CT - USA

Joined: 6/29/2015

Posts: 102

Vette(s): 1979 C3 L82 383 cu in

So a continuation of my problems from 1/17 post. I thought I solved the overheating issue with the 160 degree thermostat but only on normal street driving. At time trials yesterday after 3-1/2 laps it overheated again and I believe I burned up some connecting rod bearings based on the noise coming from the bottom of the motor.

I've checked and or fixed all the suggestions from the 2017 post so I am at a loss as to what it could be.

The two thoughts I have is not enough air is getting through the radiator because of the transmission cooler in front or the duel fan set up I have has to go and side by side fans installed. Any Help would be appreciated.

FYI: I was running the car between 3500 and 4500 RPM in second gear on the three speed automatic transmission for maximum torque through the turns. It should take it in my mind without overheating but does someone know differently?

Engine overheating

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