94 LT1 "overheating"
Thread Starter
6th Gear
Joined: Aug 2002
Posts: 6
Likes: 0
From: Chester VA
94 LT1 "overheating"
I just got my first Vette a day ago. The only problem with it is the engine
cooling fans won't run. I just found this out today. I'm sure it's a thermal
sensor or the relay itself, my problem is I don't know where either one is
for sure. I think the relay is on the left side of the radiator shroud, but I have no idea of where the sensor may be. If someone could help with the sensor location I'll have a great Labor Day project.
Thanks for your help
Norsekj
cooling fans won't run. I just found this out today. I'm sure it's a thermal
sensor or the relay itself, my problem is I don't know where either one is
for sure. I think the relay is on the left side of the radiator shroud, but I have no idea of where the sensor may be. If someone could help with the sensor location I'll have a great Labor Day project.
Thanks for your help
Norsekj
Team Owner
Joined: Aug 2000
Posts: 40,156
Likes: 45
From: San Pedro CA
Re: 94 LT1 "overheating" (NorseKJ)
Welcome!!!
The temp sensor is on the water pump. How many miles??? the waterpump and distributor, called the opti spark, get replaced about every 70,000 miles..... and a new temp sensor comes with the waterpump.
my guess is the relay... allow me a moment to refer to the helms manual... :)
there are two relays mounted next to the radiator... those are the relays you are looking for...
one last detail... this info comes from my 1992 helms manual... but the changes are not that significant.
The temp sensor is on the water pump. How many miles??? the waterpump and distributor, called the opti spark, get replaced about every 70,000 miles..... and a new temp sensor comes with the waterpump.
my guess is the relay... allow me a moment to refer to the helms manual... :)
there are two relays mounted next to the radiator... those are the relays you are looking for...
one last detail... this info comes from my 1992 helms manual... but the changes are not that significant.
Safety Car
Joined: Feb 2002
Posts: 4,212
Likes: 10
From: Sun City West Az
Re: 94 LT1 "overheating" (bogus)
Welcome to the forum. It sounds like you have a interest in doing some of your own mechanical work. It will save you a lot of $$$ if you tackle some of it yourself. I would strongly suggest you invest in a set of Helms manuals for the car. They come in a set of 2 books and you can find them on Ebay at a resonable price. They are a must and are the same books the dlr. uses to work on the car.
Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Re: 94 LT1 "overheating" (bogus)
and a new temp sensor comes with the waterpump.
Thread Starter
6th Gear
Joined: Aug 2002
Posts: 6
Likes: 0
From: Chester VA
Re: 94 LT1 "overheating" (STL94LT1)
"No I did'nt" The temp got to 220* and I shut it down. Do you know the cut on and cut off temps of the fans? Maybe I don't have a problem at all.
"Other than ignorance"
Kim
"Other than ignorance"
Kim
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Race Director
Joined: Jan 2002
Posts: 12,261
Likes: 85
From: O'Fallon Missouri
Re: 94 LT1 "overheating" (NorseKJ)
The first fan comes on at 228* and I think the auxilary fan comes on at 238*. These things run hot on the stock programming. Turn your A/C on and see if the aux fan kicks on, it should with the A/C running.
Thread Starter
6th Gear
Joined: Aug 2002
Posts: 6
Likes: 0
From: Chester VA
Re: 94 LT1 "overheating" (bogus)
Thanks for the time you gave me Andy. It seems I jumped the gun a bit.
after reading the replies to my post I sat in the car and watched the temp hit 228* and the fan came on. "I'm not used to this high temp stuff"
Thanks again
Kim
after reading the replies to my post I sat in the car and watched the temp hit 228* and the fan came on. "I'm not used to this high temp stuff"
Thanks again
Kim
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: 94 LT1 "overheating" (NorseKJ)
I do 90%+ of my own work but this is my first Vette and I have no books.
They will be orderd this week.
They will be orderd this week.
Dal's number is 800 362 9494, ask for Dal, not Parts Dept.
When I needed a vacuum booster for my 96 Impala, the local dealer wanted $380 plus sales tax, I needed to pay for it in advance and wait ~5 biz days. I called Dal, he shipped it overnight, cost was $195 plus $35 shipping (the damn thing isn't light).
Eric
Le Mans Master
Joined: Feb 1999
Posts: 5,381
Likes: 0
From: Pineville, Louisiana
Re: 94 LT1 "overheating" (NorseKJ)
Kim,
This is a normal question of new vette owners. We have all sat in our cars and seen this high temp and get scared. IN fact the first time it happened to me I was at a drive thru getting food, I shut my engine down till the food came to the window and after getting the food I ran home at high speed so the engine would cool off. Then I did the same thing as you, ask on the forum what to do... :lol:
Don't feel bad because we have all done it....
This is a normal question of new vette owners. We have all sat in our cars and seen this high temp and get scared. IN fact the first time it happened to me I was at a drive thru getting food, I shut my engine down till the food came to the window and after getting the food I ran home at high speed so the engine would cool off. Then I did the same thing as you, ask on the forum what to do... :lol:
Don't feel bad because we have all done it....
Melting Slicks
Joined: Jan 2000
Posts: 3,418
Likes: 1
From: NW Chicago Suburbs
Re: 94 LT1 "overheating" (NorseKJ)
I've since installed a 160* thermostat and programmed the fans to turn on at 180* and 200*, now my Vette runs between 180*-200* and the oil temp is almost always under 200*.
Eric
Eric
Le Mans Master
Joined: Apr 2001
Posts: 7,410
Likes: 252
From: Little Elm TX
Re: 94 LT1 "overheating" (silver & red CE)
Yeah, and like posted above, make sure the radiator is clean. They get dirty fast.
http://forums.corvetteforum.com/zerothread?id=373271
http://forums.corvetteforum.com/zerothread?id=373271
Melting Slicks
Joined: Aug 2002
Posts: 3,025
Likes: 0
From: Ellisville MO
CI 4-8-9 Veteran
St. Jude Donor '07-'08
Re: 94 LT1 "overheating" (STL94LT1)
Talked to Gordon Killebrew this weekend, about this same thing. He said that Vettes are supposed to run around the 230 mark. He said to turn the A/C on, and both fans will kick on. He also said to make sure that the radiator is clean. He is THE MAN on Corvette repairs....
:seeya
Matt
:seeya
Matt
Melting Slicks
Joined: May 2001
Posts: 2,143
Likes: 7
From: San Diego CA
Re: 94 LT1 "overheating" (NorseKJ)
Welcome to the wonderful world of the LT1/4. It's a great engine, but it has a few peculiarities. Don't panic when the temps hit 255 during hard driving. The engine is built to run at panic temps. :D I think we have all asked this question. That said, do keep the radiator clean (at least annually). Keep your hoses in good shape, they'll go before the engine.
Welcome to the family :cheers:
[Modified by John Row, 3:08 PM 9/3/2002]
Welcome to the family :cheers:
[Modified by John Row, 3:08 PM 9/3/2002]
