Swapping radiator problems 1984 Silverado - The 1947 - Present Chevrolet & GMC Truck Message Board Network

HotRodScottsdale · 04-16-2019, 09:12 PM

Got a question for the group. I'm in the middle of swapping on parts from a 83 gmc c2500 I stripped a few years ago and putting them on my Chevy k2500 and just noticed now the radiator I'm putting in the Chevy from GMC had a different heat hose routing system. My Chevy has the hoses from water pump to heater core to intake and the radiator I'm putting in is ment to have heater hose from radiator to heater core to intake. My question is what should I do with the hole for the heater core now since my engine wont require me to use it and if I have to plug it what's the best method, it is not a threaded hole just a hose clamp one.

Dead Parrot · 04-16-2019, 10:44 PM

Hose from intake is the hot output. Hose to either radiator or water pump is return. Most water pumps have a threaded place for either a hose port or plug. If your radiator is fitted for a return hose, just get a plug for the water pump hole.

Don't make the mistake of running from water pump to core and back to radiator.

HotRodScottsdale · 04-16-2019, 10:58 PM

I didnt even think of plugging the water pump. Thank you!

SunSoaked · 04-17-2019, 10:14 AM

Unless you have Vortec heads on a non-vortec block, but that's a whole nuther can of worms.

HotRodScottsdale · 04-17-2019, 11:51 PM

Quote:

Originally Posted by SunSoaked

Unless you have Vortec heads on a non-vortec block, but that's a whole nuther can of worms.

What do you mean by that?

HotRodScottsdale · 04-17-2019, 11:58 PM

https://imgshare.io/image/Z2tbX
https://imgshare.io/image/Z2oeH
https://imgshare.io/image/Z25fB

**MikeB** · 04-18-2019, 01:19 PM

The mention of Vortec heads above reminds me of a problem I have with my cooling system: I can sometimes hear "gurgling" in the heater core, and one of the heater hoses sometimes thumps against the inner fender.

I have GM Vortec heads and a 1997 350 Vortec block. After filling the cooling system I can "burp" the system a few times until no more air bubbles flow into the reservoir. But still the gurgling persists. I have the tools to evacuate the cooling system and suck in fresh coolant, but the vacuum causes my radiator hoses to collapse, which prevents me from evacuating the system entirely.

Any ideas?

geezer#99 · 04-18-2019, 01:23 PM

Put a coil in your hoses.

**MikeB** · 04-18-2019, 02:18 PM

Quote:

Originally Posted by geezer#99

Put a coil in your hoses.

Good idea, but I couldn't find just a coil, or a hose with a coil to fit.

geezer#99 · 04-18-2019, 03:09 PM

Make a coil.
I’ve used 10 feet of galvanized wire and wrapped it around a solid 2 inch pipe. Stretch it out like an accordion and then put a pigtail on each end so it can be wound into the hose easily.

**MikeB** · 04-18-2019, 03:11 PM

Sounds like a plan!

Just found this lower hose. Looks like it may have a coil inside.

https://www.rockauto.com/en/moreinfo...030824&jsn=449

04-16-2019, 09:12 PM	#1
HotRodScottsdale Registered User Join Date: Sep 2009 Location: westbank bc Posts: 239	Swapping radiator problems 1984 Silverado Got a question for the group. I'm in the middle of swapping on parts from a 83 gmc c2500 I stripped a few years ago and putting them on my Chevy k2500 and just noticed now the radiator I'm putting in the Chevy from GMC had a different heat hose routing system. My Chevy has the hoses from water pump to heater core to intake and the radiator I'm putting in is ment to have heater hose from radiator to heater core to intake. My question is what should I do with the hole for the heater core now since my engine wont require me to use it and if I have to plug it what's the best method, it is not a threaded hole just a hose clamp one. __________________ On a quite night you can hear a ford rust

04-16-2019, 10:44 PM	#2
Dead Parrot Registered User Join Date: Aug 2012 Location: Oklahoma City, OK Posts: 2,611	Re: Swapping radiator problems 1984 Silverado Hose from intake is the hot output. Hose to either radiator or water pump is return. Most water pumps have a threaded place for either a hose port or plug. If your radiator is fitted for a return hose, just get a plug for the water pump hole. Don't make the mistake of running from water pump to core and back to radiator.

04-16-2019, 10:58 PM	#3
HotRodScottsdale Registered User Join Date: Sep 2009 Location: westbank bc Posts: 239	Re: Swapping radiator problems 1984 Silverado I didnt even think of plugging the water pump. Thank you! __________________ On a quite night you can hear a ford rust

04-17-2019, 10:14 AM	#4
SunSoaked Registered User Join Date: Dec 2011 Location: Yuma Arizona Posts: 1,525	Re: Swapping radiator problems 1984 Silverado Unless you have Vortec heads on a non-vortec block, but that's a whole nuther can of worms. Attached Images

04-17-2019, 11:58 PM	#6
HotRodScottsdale Registered User Join Date: Sep 2009 Location: westbank bc Posts: 239	Re: Swapping radiator problems 1984 Silverado https://imgshare.io/image/Z2tbX https://imgshare.io/image/Z2oeH https://imgshare.io/image/Z25fB __________________ On a quite night you can hear a ford rust

04-18-2019, 01:19 PM	#7
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Re: Swapping radiator problems 1984 Silverado The mention of Vortec heads above reminds me of a problem I have with my cooling system: I can sometimes hear "gurgling" in the heater core, and one of the heater hoses sometimes thumps against the inner fender. I have GM Vortec heads and a 1997 350 Vortec block. After filling the cooling system I can "burp" the system a few times until no more air bubbles flow into the reservoir. But still the gurgling persists. I have the tools to evacuate the cooling system and suck in fresh coolant, but the vacuum causes my radiator hoses to collapse, which prevents me from evacuating the system entirely. Any ideas? __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then!

04-18-2019, 01:23 PM	#8
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,732	Re: Swapping radiator problems 1984 Silverado Put a coil in your hoses.

04-18-2019, 03:09 PM	#10
geezer#99 Registered User Join Date: Aug 2009 Location: Bowser Posts: 13,732	Re: Swapping radiator problems 1984 Silverado Make a coil. I’ve used 10 feet of galvanized wire and wrapped it around a solid 2 inch pipe. Stretch it out like an accordion and then put a pigtail on each end so it can be wound into the hose easily.

04-18-2019, 03:11 PM	#11
MikeB Senior Member Join Date: Jul 2000 Location: North Texas Posts: 3,597	Re: Swapping radiator problems 1984 Silverado Sounds like a plan! Just found this lower hose. Looks like it may have a coil inside. https://www.rockauto.com/en/moreinfo...030824&jsn=449 __________________ Mike 1969 C10 LWB -- owned for 35 years. 350/TH350, 3.08 posi, 1st Gen Vintage Air, recent AAW wiring harness, 5-lug conversion, 1985 spindles and brakes. 1982 C10 SWB -- sold 1981 C10 Silverado LWB -- sold, but wish I still had it! 1969 C10 (not the current one) that I bought in the early 1980s. Paid $1200; sold for $1500 a few years later. Just a hint at the appreciation that was coming. Retired as a factory automation products salesman. Worked part-time over the years for an engine builder and a classic car repair shop. Member here for 24 years! This is the very first car/truck Internet forum I joined. I still used a dial-up modem back then! Last edited by MikeB; 04-18-2019 at 03:17 PM.



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