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Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: Vincep ()
Date: July 03, 2015 07:33AM

Has your Corvair ever overheated? If so, under which circumstances?

For late model Corvair's with no temp gauge (like mine) how do you know your engine is getting hot; almost to the point of overheating?(to get an advanced warning) Thank you kindly.

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: rnch ()
Date: July 03, 2015 07:41AM

Even with added engine load of MOST desirable Factory Air conditioning, in the intense Heat & Humidity of New Orleans, LA I have never had the "temp" light come on.

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: cnicol ()
Date: July 03, 2015 07:55AM

Overheating is very unusual for a Corvair with an intact cooling system. Kinda like "never happens".

The key is "Intact" meaning all the perimeter seals are there, fins are clean, damper doors work, oil cooler is clean.

When there is a problem, it's more often the oil that gets hot first and you will see the oil light flickering at idle. Another sign is unusual engine spark knock.

Generally, not a problem.

Craig N. Coeur d'Alene ID.
66 Black Monza 4dr, 4.2L V8 49k
61 Seamist Jade Rampside 140 PG
60 Monza coupe (sold, sniff sniff)
66 Sprint Corsa convt - First car! Re-purchased 43 years later
2+2 gnatsuM 5691

+17 Tons of parts

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: Vincep ()
Date: July 03, 2015 08:20AM

cnicol Wrote:
-------------------------------------------------------
> Overheating is very unusual for a Corvair with an
> intact cooling system. Kinda like "never happens".
>
>
> The key is "Intact" meaning all the perimeter
> seals are there, fins are clean, damper doors
> work, oil cooler is clean.
>
> When there is a problem, it's more often the oil
> that gets hot first and you will see the oil light
> flickering at idle. Another sign is unusual engine
> spark knock.
>
> Generally, not a problem.

This is good to know.

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: cad-kid ()
Date: July 03, 2015 08:23AM

The original temp switch can fail with age and cause a false hot indication. I installed a new switch just to be on the safe side.

Jeremy (cad-kid)
Kronenwetter, WI (Central Wisconsin)
CORSA Member#031129
SOLD-9-2016 65 Monza 4spd/140
My 65 Monza thread
My YouTube page yawning smiley

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: MattNall ()
Date: July 03, 2015 08:26AM

Right!! as the snap switch ages.....it will trigger at a lower and lower temp!!

Failsafe!


Just like out Engine Thermostats... they ONLY fail in the full OPEN position!





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: davemotohead ()
Date: July 03, 2015 08:29AM

If the car sat for a long time before you got it you should take the carbs off and take the fan shroud off and check for Rat nest and crap in the cylinders, the most important thing to get it running cool is heads and cylinder fins are clean so the air flows! Air is your Water,the fins are your radiator, if clogged up or you have air leaks you can over heat.





Email me at: Dave Motohead

1960 4dr sedan caveman car
1961 Rampside (Chetside)
1962 Rampside (Barnside)
1962 Short Rampside (Shortside)
1962 Monza 700 Wagon
1963 Monza 900 coup (General Nader)

-----------------------------------
Rust Free Lancaster Ca

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: jimmyo ()
Date: July 03, 2015 08:42AM

Having the timing to advanced can lead to your engine overheating and pinging.

Jim O'Connor
45 miles north of The Bronx, N.Y.
1962 Greenbrier 110 4spd
1964 Monza Convertible 110 PG
"Wherever you go....There you are"

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: richard1 ()
Date: July 03, 2015 09:08AM

The first time my light came on I got worried. Ambient temps were about 95 and I had just climbed the mountain at 60 mph.

I got out and checked the temperatures with my laser gun. Oil filter was 105ºC, hood paint was 175ºC (sunny day). I bought a new sender but haven't gotten around to installing it.

I like having the early warning, but once it comes on you don't know how much higher it will go, so on the next oil change I plan on installing the sender (60 is down by the pan).

Restoration in Bolivia
Richard's Mini Pickup
Richard's Corvair
Richard's Renault Dauphine

Selection of the Right Motor Oil for the Corvair
Selection of the right transmission oil for the corvair
How to polish and restore stainless and aluminum trim

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: 63turbo ()
Date: July 03, 2015 09:39AM

Yes, I have had actual "over heating" exactly once. Actual overheating is when the head temperature warning buzzer goes off, and my recollection is that it takes 575F for that buzzer to come on for a Spyder.

Here's the circumstances. I had a 62 Spyder with a 140 installed, and had a 2 into 1 exhaust with a stock Turbo muffler (so as to look like it still had the turbo). I was driving on a freeway during the summer, the air temperature was probably in the 80's and I was doing 80-90 miles an hour for an hour or 2, and then I came to a long hill, and part way up that hill is when the warning buzzer went off. It surprised me, as the head temperature gauge had never worked, and I guess I had gotten sort of used to being blissfully unaware of head temperatures, so when that buzzer went off, I'm thinking "wow! that buzzer
still works?" and then I'm thinking "KRAP- it takes a very high temperature for that buzzer to come on!!!!!". I slowed down, and moved over to the shoulder, and let it idle for a good while after the buzzer turned off, and then continued on my way, at a somewhat reduced speed, closer to the legal limit and it didn't come on again.

Years later, I took the engine out for disassembly, and found that the cross-over pipe had a LARGE dent in it (I remember it looked like the diameter had been reduced by about half at the dent), and there were numerous chunks of old paper towels and dirt blocking the oil cooler and heads. The dent in the pipe and the paper towel/dirt blockages were present at the time of the over-heating episode, so yes I can verify first hand that it takes an awful lot of stupidity to cause over-heating.

------------------------------------

Kevin Nash
Friday Harbor Washington
63 Spyder, Daily driver, EFI read about my project here: [corvaircenter.com]
first test start on EFI here:[www.youtube.com]
first official EFI boost test here:[www.youtube.com]
My new fan! [corvaircenter.com]
engine less 62 Spyder
Canadian 64 Monza Parts car



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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: RthrDent ()
Date: July 03, 2015 02:20PM

I too have actually overheated once. Climbing the Baker grade on I-15 going to Vegas in a '64 500 coupe. The temp-press light came on and "oh crap!". Pulled over, checked the oil, all as fine. Started right up, no more light. (scratch head) Finally occurred to me that it had overheated! Of course it was 122 degrees at the time and I was climbing a grade at 80mph. Yea, it takes quite a bit.

Allen and Stacy, Golden Valley,AZ
Facebook: [www.facebook.com]
[www.facebook.com]

'61 Lakewood
'65 Corsa turbo convertible (former)
'64 Spyder convertible (former)






"I love the smell of oil smoke in the morning."

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: jjohnsonjo ()
Date: July 03, 2015 03:46PM

Sent my temp light and buzzer off one time in 50 years. Going up Pikes Peak, driving rather aggressively, turbo, long periods of boost. I thought I threw a belt, but no, it was fine after a few minutes at idle. Dropped a seat about ten years later, was this the cause, who knows.

Your biggest risk is a hot spot, that is as mentioned before, a mouse nest or rag in one spot. Pulling the roaster is the only way to know. You can also check for flash at the same time.

J.O.

65 Corsa Turbo Vert
79 Honda XL 500S
69 Honda CL 160 D
2010 BMW F 650 GS
2003 Bounder 36D
2013 KIA Optima SX turbo-AKA ZIPPY (wife,s car)
69 Newport Holiday Sailboat
Baja 150 dune buggy cart
Coleman HS 500 UTV
2016 KIA Sorento SXL Turbo

Bethlehem,Pa

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: RexJohnson ()
Date: July 03, 2015 04:16PM

I just got back from the convention. There were 5 adults in the car with luggage and parts from vending in the tralier for a total weight of about 5,500 lbs. Most of the 3 day temps were in the upper 90's to low 100's. The car did fine with the temps but the family thought they were dying.

RJ tools
Salem,Oregon

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: Bogey72 ()
Date: July 03, 2015 04:32PM

Another sign it is overheating is if it continues to run, after you shut it off. This was occurring on mine when I bought it. As soon as I adjusted the timing, it stopped running over.

Ed Conto
Saratoga Springs, NY
1965 Monza Convertible, PG
Owner since August 2013

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: Templar8 ()
Date: July 03, 2015 07:36PM

Do you think guys that if you open wide the heating whent the engine is overheating will help lowering the temp ?
Alain

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: MattNall ()
Date: July 03, 2015 07:45PM

No!! these are not waterpumpers....

Airflow to the heater is restricted..

1 Slow down...

2 Shift down

3 pull over and check fanbelt if Gen / Fan light is also on..

If fanbelt is still on just let it idle and the light should go off..... then let it idle 10 minutes more..





MODERATOR
Sea Mountain, between Charleston Harbor and Coos Bay! SW Oregon Coast
Click HERE for My Website...Click HERE for My TechPages!
..............................110-PG.................................................Webered-Turbo

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: nnsquared ()
Date: July 03, 2015 08:37PM

When you have the top shroud off, look up "deflash" and do that, too.

Regards,
Kerwin,
Valley Forge, PA
65 Monza 110 PG, Stinger wannabe SW 001


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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: playerpage ()
Date: June 28, 2018 01:47PM

So if I drive at 50 miles an hour for 40 minutes in 95 degree weather, and the engine dies and my oil is literally boiling, did I overheat?

I have since fixed the dying problem by putting a gas regulator on the car--turns out my electric pump was sending 11 PSI to my Turbo--But I occasionally get oil burn even though I haven't boiled over since then and I worry.

Eric C. Player
Porterville, CA
- National Member, CORSA
- Member: Central Coast CORSA & South Coast CORSA
Former Member: Vintage CORSA Orange County. Member, ISA (Int. Screenwriter's Assn.), SAG Eligible, and Producer's Guild Aspirant


* Then: 1966 Corsa 180 Turbo, Red/1965 Monza 110 Purple/
1967 Monza 140 Red/1966 500 110 Black/1965 Monza 110 Yellow
* Now: 1966 Corsa 180 Turbo Project. Blue, Blue/Beige interior.



"Chevrolet's Corvair was a maverick machine, a rear-engined renegade born out of spite and genius." -- Sports Car Graphic, August 1969

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: thewolfe ()
Date: June 28, 2018 02:03PM

Your car should have no problem driving all day at 50 or even 70 in 90 degree weather. If it is getting that hot only driving 50 to where its dying then something is not right. Loose fan belt comes to mind. I've seen it personally when I broke a fan belt hours from home and didn't have the 9/16" wrench to loosen or tighten the tensioner pulley. I got the spare belt on and the fan spun but the belt was not tight and must have been slipping because I overheated it within 10 minutes of driving on the freeway to the point of the engine shutting down and a bunch of smoke(no buzzer and temp gauge was not working at the time). That was in 2006. Amazing I'm still running on the same bottom end and boost 15+ psi every time I drive it. The heads, however did not survive that abuse.

Nate Wolfe
Portland OR
65 Corsa 180

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Re: Corvair Overheating Questions.(Has yours ever overheated?)
Posted by: Layton Curtis ()
Date: June 28, 2018 02:13PM

When you take the top shroud off, make sure both cylinder tins are in place. If not and if one or both are missing you will get overheating. Most of us have forgotten to put them back on at some point in time.

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