LT1 Running Hot

[1979Calais]

There are a couple of LT1 generations - 1st gen wasn't reverse flow. Make sure your belt set-up is spinning the pump the right way and you have the right fan.

I have a 95 Camaro LT1 and the belt does not spin the pump, as the water pump is cam driven I believe. Also, I have electric fans.

 

[L92 OLDS]

I measured the temp by looking at my cluster; which is a Dakota Digital VHX.

Are you using the temperature sensor that Dakota digital provided with your cluster?

 

[lilbowtie]

Ya you jogged my memory - I was thinking about reverse rotation pumps w/ serpentine drives.

 

[L92 OLDS]

There are a couple of LT1 generations - 1st gen wasn't reverse flow. Make sure your belt set-up is spinning the pump the right way and you have the right fan.

You are correct but the 1st gen LT1 you are referring to is a SBC from 1970-1972. The OP has a modern EFI engine with reverse flow cooling (1992-1997)

 

[Mat1227]

The LT1's have 2 knock sensors on them, one on each side of oil pan, you need to remove these to flush the coolant properly, this will make sure you have a clean passage for the coolant to travel. Mine only had 37k miles on it and there was quite a lot of crap in there. As others have said, the water pump is unique to the LT1 and there is no belt that drives it, although there is a small splined coupling that drives it, sounds like you have had the pump off already, did you put the coupling on the new pump when replacing the old pump? It's easy to miss if old pump was grease covered or really cruddy. I attached a picture of the coupling, check your old pump to see if still attached.

 

[1979Calais]

Yes, I am using the temp sensor that came with the cluster.

Are you using the temperature sensor that Dakota digital provided with your cluster?

Yes

 

[1979Calais]

The LT1's have 2 knock sensors on them, one on each side of oil pan, you need to remove these to flush the coolant properly, this will make sure you have a clean passage for the coolant to travel. Mine only had 37k miles on it and there was quite a lot of crap in there. As others have said, the water pump is unique to the LT1 and there is no belt that drives it, although there is a small splined coupling that drives it, sounds like you have had the pump off already, did you put the coupling on the new pump when replacing the old pump? It's easy to miss if old pump was grease covered or really cruddy. I attached a picture of the coupling, check your old pump to see if still attached.

I don't have the pump off right now, but it did check for that when it first ran hot. Also, the engine was rebuilt before I put it in my car.

 

[pontiacgp]

If you want a good tool to bleed the system get one of these.....it's the easiest way I know to bleed any system, you use the proper adapter and fill up the funnel til the fluid level is higher than any part of the cooling system. The when you're done use the stop and pour the remaining coolant that's in the funnel into your container.....

Lisle 24680 Spill Free Funnel Set

 

[1979Calais]

pontiacgp,
I was told weeks ago by crucial118, that I should have used that also

 

[pontiacgp]

pontiacgp,
I was told weeks ago by crucial118, that I should have used that also

it's foolproof and you can enjoy a beer while it's doing it's job....