POP goes the radiator cap
POP goes the radiator cap Hey everyone,
I have had an issue in the past where my 347 would use a little coolant upon some spirited driving. So I changed the gaskets (GM MLS) and things were good again.
Now the radiator cap is tough to twist off and once I rotate it over it gvies a gerber baby food "POP" and there is an inch + of coolant gone.
I am not to terribly worried. The block has a good 20K + miles on it @ about 575 @ the tires. I have self taught myself how to tune (still don't know a whole lot) and through this I have boosted the car with a lot of timing which resulted in pinging.... well you get the idea. In other words, the motor I am sure is still good, but has also seen its days. I have replaced the gaskets before due to a loss of coolant, but I have never had the radiator cap POP before.
Anyone else experience this?
Thanks,
Glenn
I have had an issue in the past where my 347 would use a little coolant upon some spirited driving. So I changed the gaskets (GM MLS) and things were good again.
Now the radiator cap is tough to twist off and once I rotate it over it gvies a gerber baby food "POP" and there is an inch + of coolant gone.
I am not to terribly worried. The block has a good 20K + miles on it @ about 575 @ the tires. I have self taught myself how to tune (still don't know a whole lot) and through this I have boosted the car with a lot of timing which resulted in pinging.... well you get the idea. In other words, the motor I am sure is still good, but has also seen its days. I have replaced the gaskets before due to a loss of coolant, but I have never had the radiator cap POP before.
Anyone else experience this?
Thanks,
Glenn
TECH Apprentice
Joined: Sep 2005
Posts: 333
Likes: 0
From: Detroit
I've had this problem last year running 15-17psi on my D1... 347cid like yours... what happened is my gaskets started leaking and under boost -- the heads lifted off just enough to pressurize my cooling system casuing the radiator cap to pop... After ripping the heads off, I had 3 cyclinders leaking on the left bank... hope this helps...
Jay
Jay
Thanks Jay,
I have come to the realization that the heads have lifted again. I have a 6 liter iron block I am working on. I will just have to speed it up!
I guess part of me was hoping that it would be in the radiator cap. This would buy me some time on the other build I am doing.
Glenn
I have come to the realization that the heads have lifted again. I have a 6 liter iron block I am working on. I will just have to speed it up!
I guess part of me was hoping that it would be in the radiator cap. This would buy me some time on the other build I am doing.
Glenn
TECH Enthusiast
Joined: Mar 2004
Posts: 604
Likes: 0
From: Loganville, GA
Originally Posted by W8N2SQZ
ARP studs, unported 317 heads, and GM MLS 6 liter gaskets.
Talked to my engine builder today and he has 4 LSX blocks in stock. Who know what will happen
Glenn
Talked to my engine builder today and he has 4 LSX blocks in stock. Who know what will happen
Glenn
