Issues with 77, more questions.
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
Issues with 77, more questions.
Been a rough going lately. Ignition module took a dump, then alternator. Been spending alot of time on this forum. Anyway, I have champion radiator, with a recently installed flex a lite fan pushing 3000 cfm. Engine is idling and running about 200-210 degrees per the brand new autometer gauge that kicked my *** during the install. Would love to get the temps down. I noticed that I have no expansion tank/ recovery tank. I know they changed in my year model(77). If I hook one of these up, would it cool Me down a bit, and I have a aftermarket aluminum champion radiator with a welded nipple right below the cap. This is where the tank would hook up too right?
Sorry for the all the post guys, car is not being good to me this summer
Sorry for the all the post guys, car is not being good to me this summer
Melting Slicks
Joined: Jul 2006
Posts: 2,291
Likes: 492
From: Salmon Arm, BC
Yes that nipple is where you would attach the surge tank. It's a good Idea to have it installed, as the engine always is puking a little coolant out after shutting a hot engine down, and sucking some back in as it cools....keeps the rad topped to the correct level with coolant.
Your fan is a mechanical fan??? How about the thermostat, you should have a 195 degree thermostat in there, and if your not sure, spend the $10 bucks and get a new one.
The lower airdam is really important to guide higher pressure air up into the front of the rad for proper cooling...make sure all the foam bits are there too.
Your fan is a mechanical fan??? How about the thermostat, you should have a 195 degree thermostat in there, and if your not sure, spend the $10 bucks and get a new one.
The lower airdam is really important to guide higher pressure air up into the front of the rad for proper cooling...make sure all the foam bits are there too.
Pro
Joined: Mar 2006
Posts: 536
Likes: 87
From: SW Ohio
Mike
I run a 180 T stat in my 75 & the GTO, also check your timing again this can cause high heat
Your fan needs to move a bunch of air
At idle can you feel the air movement from the fan in front of the engine & heads ? If not you are not moving enough air across the radiator coils.
I had trouble with this on the Pontiac clutch fan was bad
I run a 180 T stat in my 75 & the GTO, also check your timing again this can cause high heat
Your fan needs to move a bunch of air
At idle can you feel the air movement from the fan in front of the engine & heads ? If not you are not moving enough air across the radiator coils.
I had trouble with this on the Pontiac clutch fan was bad
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
Mike
I run a 180 T stat in my 75 & the GTO, also check your timing again this can cause high heat
Your fan needs to move a bunch of air
At idle can you feel the air movement from the fan in front of the engine & heads ? If not you are not moving enough air across the radiator coils.
I had trouble with this on the Pontiac clutch fan was bad
I run a 180 T stat in my 75 & the GTO, also check your timing again this can cause high heat
Your fan needs to move a bunch of air
At idle can you feel the air movement from the fan in front of the engine & heads ? If not you are not moving enough air across the radiator coils.
I had trouble with this on the Pontiac clutch fan was bad
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
Yes that nipple is where you would attach the surge tank. It's a good Idea to have it installed, as the engine always is puking a little coolant out after shutting a hot engine down, and sucking some back in as it cools....keeps the rad topped to the correct level with coolant.
Your fan is a mechanical fan??? How about the thermostat, you should have a 195 degree thermostat in there, and if your not sure, spend the $10 bucks and get a new one.
The lower airdam is really important to guide higher pressure air up into the front of the rad for proper cooling...make sure all the foam bits are there too.
Your fan is a mechanical fan??? How about the thermostat, you should have a 195 degree thermostat in there, and if your not sure, spend the $10 bucks and get a new one.
The lower airdam is really important to guide higher pressure air up into the front of the rad for proper cooling...make sure all the foam bits are there too.
Melting Slicks
Joined: Jul 2006
Posts: 2,291
Likes: 492
From: Salmon Arm, BC
The problem lies with the fact that the "fan doesn't cover the entire radiator."
You need to build a fan shroud that covers the entire radiator and then mount the cooling fan on that.
Kind of like this.....http://img.youtube.com/vi/ub04uaZMVf4/0.jpg
You need to build a fan shroud that covers the entire radiator and then mount the cooling fan on that.
Kind of like this.....http://img.youtube.com/vi/ub04uaZMVf4/0.jpg
Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
The problem lies with the fact that the "fan doesn't cover the entire radiator."
You need to build a fan shroud that covers the entire radiator and then mount the cooling fan on that.
Kind of like this.....http://img.youtube.com/vi/ub04uaZMVf4/0.jpg
You need to build a fan shroud that covers the entire radiator and then mount the cooling fan on that.
Kind of like this.....http://img.youtube.com/vi/ub04uaZMVf4/0.jpg
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
Pulls more air through it as a whole
Remember to put a number of rubber flaps ie vents in there so when youre at speed the air has somewhere to go or youll risk heating up at hwy speeds.
Google the fan man, give you some good ideas.
If you look at a lot of GM shrouds there are usually open spaces around it for that purpose
Remember to put a number of rubber flaps ie vents in there so when youre at speed the air has somewhere to go or youll risk heating up at hwy speeds.
Google the fan man, give you some good ideas.
If you look at a lot of GM shrouds there are usually open spaces around it for that purpose
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Thread Starter
Racer
Joined: Apr 2015
Posts: 412
Likes: 12
From: Carrollton, Georgia
Pulls more air through it as a whole
Remember to put a number of rubber flaps ie vents in there so when youre at speed the air has somewhere to go or youll risk heating up at hwy speeds.
Google the fan man, give you some good ideas.
If you look at a lot of GM shrouds there are usually open spaces around it for that purpose
Remember to put a number of rubber flaps ie vents in there so when youre at speed the air has somewhere to go or youll risk heating up at hwy speeds.
Google the fan man, give you some good ideas.
If you look at a lot of GM shrouds there are usually open spaces around it for that purpose
Team Owner
Joined: Oct 2004
Posts: 81,241
Likes: 3,063
From: altered state
St. Jude Donor '05
The flaps stay shut at idle or lower speeds so you get the full effect of the shroud. When pressure builds up the flaps get forced open and release the air the fan cant pull in.
Those use 3 1/8 in holes and have rubber nubs you just push through the hole to stay put. Cut your holes a little smaller than the flap
Looks like Summit sells them now nothing on Fan Man site anymore. Giants win again...
4 should be plenty
http://www.summitracing.com/parts/sp...FQgaaQodBDQNrQ
Those use 3 1/8 in holes and have rubber nubs you just push through the hole to stay put. Cut your holes a little smaller than the flap
Looks like Summit sells them now nothing on Fan Man site anymore. Giants win again...
4 should be plenty
http://www.summitracing.com/parts/sp...FQgaaQodBDQNrQ
Last edited by cv67; May 11, 2016 at 07:02 PM.
Melting Slicks
Joined: Jul 2006
Posts: 2,291
Likes: 492
From: Salmon Arm, BC
Here is a vid from a fellow vette owner on building your own shroud