Air in cooling system

ChevyII · 07-09-2008, 02:45 PM

Any quick tips to remove air from my cooling system?

The engine is a 434 Shafiroff SBC using a Brodix dominator intake. I installed some coolant lines from the front to rear of intake and now it seems I am getting air trapped in cooling system. The rad is mounted lower than the raised CSR water inlet installed on the intake.

Motor is running warmer than usual. Lean jetting requiring bigger jets?

Could this also be caused by the engine diapers we are now all running?

Any tips would be appreciated.

Regards,

Mike Ferstl
SG SR 6091

07-09-2008, 03:16 PM

You may have to jack the car up so the radiator fill is higher than the lines. Air needs to escape and can't if it is the highest level.

63corvette · 07-09-2008, 03:23 PM

I had exactly the same problem some years ago. The only way I took care of it was to install a vent on the very top of the radiator and a small braided steel line 1/8 inch from the radiator next to the vent back to the CSR filler neck on the manifold. Vent the radiator as you fill the radiator and then again after you run the pump for a few minutes. Turn the water pump off before venting as the pump can pull air back in.
I think the 1/8 inch vent line basically kept the system from air locking. I think that was my problem as sometime it would run cool and other times it would heat and blow out water. I never had the problem after doing both things. You might try one at a time. One might fix it.
Good Luck With The Issue

ChevyII · 07-09-2008, 03:27 PM

Don,

Good point! I forgot to make sure the CSR water inlet is higher than the coolant lines.

By the way, just started using your version 7 and everything is operating well.

Thanks for a great product!

Mike Ferstl
SG SR 6091

SC1448 · 07-09-2008, 06:41 PM

Try filling your cooling system with one of these, they are the best thing out there for getting stubborn air pockets out of the system, especially when a low-mount radiator is used. Money well spent. Click on the link below:
http://www.etoolcart.com/index.asp?P...D&ProdID=10159

Good luck!
-Don

ChevyII · 07-10-2008, 10:23 AM

Gents,

Thanks for the information! This is what makes this sport of ours so unique as everyone is willing to help out.

Appreciate the advice.

Cheers!

Mike Ferstl
SG SR 6091

PS my apologies for posting this on the regular .90's heading rather than the tech heading.

07-09-2008, 02:45 PM	#1
ChevyII Member Join Date: Sep 2006 Location: Calgary, Alberta Posts: 263 Likes: 3 Liked 2 Times in 2 Posts	Air in cooling system Any quick tips to remove air from my cooling system? The engine is a 434 Shafiroff SBC using a Brodix dominator intake. I installed some coolant lines from the front to rear of intake and now it seems I am getting air trapped in cooling system. The rad is mounted lower than the raised CSR water inlet installed on the intake. Motor is running warmer than usual. Lean jetting requiring bigger jets? Could this also be caused by the engine diapers we are now all running? Any tips would be appreciated. Regards, Mike Ferstl SG SR 6091 Last edited by ChevyII; 07-09-2008 at 03:19 PM.

07-09-2008, 03:16 PM	#2
crewchiefpro Guest Posts: n/a	Re: Air in cooling system You may have to jack the car up so the radiator fill is higher than the lines. Air needs to escape and can't if it is the highest level.

07-09-2008, 03:23 PM	#3
63corvette Senior Member Join Date: Mar 2007 Location: Canyon, Tx Posts: 551 Likes: 127 Liked 353 Times in 102 Posts	Re: Air in cooling system I had exactly the same problem some years ago. The only way I took care of it was to install a vent on the very top of the radiator and a small braided steel line 1/8 inch from the radiator next to the vent back to the CSR filler neck on the manifold. Vent the radiator as you fill the radiator and then again after you run the pump for a few minutes. Turn the water pump off before venting as the pump can pull air back in. I think the 1/8 inch vent line basically kept the system from air locking. I think that was my problem as sometime it would run cool and other times it would heat and blow out water. I never had the problem after doing both things. You might try one at a time. One might fix it. Good Luck With The Issue

07-09-2008, 03:27 PM	#4
ChevyII Member Join Date: Sep 2006 Location: Calgary, Alberta Posts: 263 Likes: 3 Liked 2 Times in 2 Posts	Re: Air in cooling system Don, Good point! I forgot to make sure the CSR water inlet is higher than the coolant lines. By the way, just started using your version 7 and everything is operating well. Thanks for a great product! Mike Ferstl SG SR 6091 Last edited by ChevyII; 07-09-2008 at 05:49 PM.

07-09-2008, 06:41 PM	#5
SC1448 Member Join Date: Jun 2003 Location: Southampton, PA Posts: 226 Likes: 5 Liked 2 Times in 2 Posts	Re: Air in cooling system Try filling your cooling system with one of these, they are the best thing out there for getting stubborn air pockets out of the system, especially when a low-mount radiator is used. Money well spent. Click on the link below: http://www.etoolcart.com/index.asp?P...D&ProdID=10159 Good luck! -Don

07-10-2008, 10:23 AM	#6
ChevyII Member Join Date: Sep 2006 Location: Calgary, Alberta Posts: 263 Likes: 3 Liked 2 Times in 2 Posts	Re: Air in cooling system Gents, Thanks for the information! This is what makes this sport of ours so unique as everyone is willing to help out. Appreciate the advice. Cheers! Mike Ferstl SG SR 6091 PS my apologies for posting this on the regular .90's heading rather than the tech heading.