What the heck is this? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**old Rusty C10** · 05-12-2014, 05:45 PM

this has two air lines to it and it goes in between the two sections of the upper hose on the 427?
truck overheated majorly found a pin hole in the heater hose between the block and rad... the hoses here were leaking a little... just trying to figure out what this is going to cost me

Fatherof3 · 05-12-2014, 05:50 PM

It's and oil cooler. They are supposed to go in the lower hose though.

OPPS, I was going by the picture only.

Don't know about air lines

63 & 64 Bowties · 05-13-2014, 08:21 AM

Interesting. Just a wild guess here from an ex-truck driver:
Could that be an air heater of some kind? The modern air dryers have only been around for about 40 years, so this may be what pre-dated the air dryer. If that's what it is, it would be there to keep the moisture in the air brakes from freezing in winter.
Like I said, just a wild guess.

**old Rusty C10** · 05-13-2014, 08:39 AM

Sad thing is none of the guys at Napa know either lol

Robert1970C20rstbukt · 05-13-2014, 11:07 PM

That's an engine cooler that uses water from the fire pump to cool the engine down if it overheats while pumping water. There is a coil of copper tubing inside, it circulates the water back and forth from the pump. My '69 GMC has one, the copper lines run to a small gate valve near the pump.

**old Rusty C10** · 05-14-2014, 08:18 AM

that makes sense.. im going to bypass that for the moment to see if there is any damages to the motor after overheating. Ihave since found the radiator to be leaking

05-12-2014, 05:45 PM	#1
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,276	What the heck is this? this has two air lines to it and it goes in between the two sections of the upper hose on the 427? truck overheated majorly found a pin hole in the heater hose between the block and rad... the hoses here were leaking a little... just trying to figure out what this is going to cost me Attached Images __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-12-2014, 05:50 PM	#2
Fatherof3 Registered User Join Date: Nov 2013 Location: North Bend Wa Posts: 355	Re: What the heck is this? It's and oil cooler. They are supposed to go in the lower hose though. OPPS, I was going by the picture only. Don't know about air lines __________________ 65 C20 292 4spd 4:56 Eaton HO52 Last edited by Fatherof3; 05-12-2014 at 05:57 PM.

05-13-2014, 08:21 AM	#3
63 & 64 Bowties and a few others Join Date: Jun 2007 Location: Blue Ridge Mountains of VA Posts: 5,638	Re: What the heck is this? Interesting. Just a wild guess here from an ex-truck driver: Could that be an air heater of some kind? The modern air dryers have only been around for about 40 years, so this may be what pre-dated the air dryer. If that's what it is, it would be there to keep the moisture in the air brakes from freezing in winter. Like I said, just a wild guess. __________________ Bill US Army Vet -193rd Infantry BlueRidgeMuscleCars.com “The greatness of a nation and its moral progress can be judged by the way its animals are treated” Gandhi

05-13-2014, 08:39 AM	#4
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,276	Re: What the heck is this? Sad thing is none of the guys at Napa know either lol __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-13-2014, 11:07 PM	#5
Robert1970C20rstbukt Registered User Join Date: Jun 2004 Location: Beeville, Texas Posts: 1,943	Re: What the heck is this? That's an engine cooler that uses water from the fire pump to cool the engine down if it overheats while pumping water. There is a coil of copper tubing inside, it circulates the water back and forth from the pump. My '69 GMC has one, the copper lines run to a small gate valve near the pump. __________________ RJD 1984 Chevrolet C30 welding truck 454/SM465 1977 GMC C15 pickup 350/TH350 1970 Chevrolet C20 pickup 350/TH400 1970 Chevrolet K20 Suburban 454/TH350 1969 GMC 8500 478M V6/5 spd winch truck

05-14-2014, 08:18 AM	#6
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,276	Re: What the heck is this? that makes sense.. im going to bypass that for the moment to see if there is any damages to the motor after overheating. Ihave since found the radiator to be leaking __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!



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