heater hoses to engine swapped? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

kulturekat · 01-08-2009, 12:35 AM

just out of curiousity what would happen if someone were to swap the two hoses going to and from the heater that connect to the intake and to the water pump? what would be the effects if any? would it cause the engine to over heat?

LuckyHenriksen · 01-08-2009, 12:37 AM

EDIT: Read the post wrong

kulturekat · 01-08-2009, 12:44 AM

it isnt somehting i was thinking about doing its more of somehting i think i may have done. anyone know which one should go where?

rico7769 · 01-08-2009, 12:53 AM

Hose sizes coming from the heater core should be sized to accomodate the correct fitting on the intake and the water pump. I found out I had mine switched by forcing the wrong hose onto the bottom of the heater core and snapping it off. Not fun replacing stuff due to ignorance. I have the top hose from the core into the intake and the bottom to the water pump. I haven't had any issues. Hope this helps. Not really sure what the outcome is of switching them.

kulturekat · 01-08-2009, 01:03 AM

i just went out to make sure and mine are matched up the same way. this came up because my truck started heating up tonight and not sure why ...i have been driving it for a while and its been doing fine and all the sudden tonight it went to 210 i have a 180 thermostat in it the only thing i can think of is that it went bad or is stuck. guess ill go buy another one tomrrow. anyone have any other ideas?

**WorkinLonghorn** · 01-08-2009, 01:21 AM

The two are different sizes,as mentioned above,( 5/8" and 3/4" IIRC) but I don't see how having them reversed would cause any problem at all.
On mine, I have bypassed the heater altogether and there is no difference.

**El Jay** · 01-08-2009, 02:23 AM

Quote:

Originally Posted by kulturekat

i just went out to make sure and mine are matched up the same way. this came up because my truck started heating up tonight and not sure why ...i have been driving it for a while and its been doing fine and all the sudden tonight it went to 210 i have a 180 thermostat in it the only thing i can think of is that it went bad or is stuck. guess ill go buy another one tomrrow. anyone have any other ideas?

BTW, the thermostat controls the minimum temperature, not the maximum, for whatever that's worth.

You can take thermostat out & put it into a pan of water on the stove. Put a fire under the pan & see if the thermostat opens.
If you have a candy thermometer, clip it to the side of the pan, but don't let it touch the bottom.
That way you can see exactly @ what temperature your thermostat opens.

If the thermostat works, start looking elsewhere.
Start with the simple stuff, is the radiator full, etc? And then move on from there.

That's a lot cheaper than just going out & buying parts.

If you don't have a candy thermometer, go to the grocery store & buy one. You'll need it for making fudge anyhow.

Just my .02.

kulturekat · 01-08-2009, 01:27 AM

i kind of ruled the hoses out as reason for the overheating but i figured id ask anyway. now on to figure out the real cause. gotta sart someone right?

Longhorn Man · 01-08-2009, 03:35 AM

having them swapped would not anve any ill effects on your engine, heater, air temp, nor coolant temp.
If you managed to pull it off.... no one would ever know.
Till one popped off due to size incompatibility anyways.

**truckdude239** · 01-08-2009, 08:06 AM

210 is still normal to me i like to see cars run between 180-215. course the cool the motor the better the preformance

**LockDoc** · 01-08-2009, 11:23 AM

-
#1 - Make sure your fan belt is tight....

LockDoc

kulturekat · 01-08-2009, 11:53 AM

210 just scares me ive never had a car or truck run that hot. but ive heard that from someone else that that is normal as well. the only other hting is that when it gets to 210 it smells hot.

i didnt think of the fan belt ill check that this afternoon

**LockDoc** · 01-08-2009, 01:37 PM

-
I had an experienced mechanic here in town recommend a warmer thermostat in my 327 based '36 Ford Coupe. I had a 185º in it and he recommended a 195-200º. I followed his recommendation and for the first few days it smelled hot too but it went away after driving it for a while. I don't consider 210º a problem. If it boils over... that's a problem..

LockDoc

BLACK AND BLUE 67-72 · 01-08-2009, 01:54 PM

It will work fine, and the hoses can be reversed, it is just a real pain trying to get 5/8 hose over a 3/4 fitting, but it will fit!!!!

**El Jay** · 01-08-2009, 08:49 PM

Quote:

Originally Posted by kulturekat

210 just scares me ive never had a car or truck run that hot. but ive heard that from someone else that that is normal as well. the only other hting is that when it gets to 210 it smells hot.

i didnt think of the fan belt ill check that this afternoon

Don't take this a gospel, because I don't mess with 'em, but I think on the newer, smog controlled cars that coolant temperature in the 240+ range isn't uncommon.
That's why temp gauges are marked C-----H, rather than in degrees; so drivers don't soil their laundry when they see the temperature.

If I'm wrong, somebody correct me, please!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

PanelDeland · 01-08-2009, 08:36 PM

I reversed mine.I don't remember having a problem getting them on and haven't had a problem keeping them on.I'm kinda AR about stuff and didn't like the hoses crossing under the hood.When I asked someone else said they had done the same for the same reason.

01-08-2009, 12:37 AM	#2
LuckyHenriksen Registered User Join Date: Oct 2007 Location: Sherwood Oregon Posts: 1,908	Re: heater hoses to engine swapped? EDIT: Read the post wrong __________________ 1968 Yenko Chevy LWB 6.0L/TH400 3/4 Drop Senior Project Build Thread Here Last edited by LuckyHenriksen; 01-08-2009 at 12:38 AM.

01-08-2009, 12:44 AM	#3
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater hoses to engine swapped? it isnt somehting i was thinking about doing its more of somehting i think i may have done. anyone know which one should go where?

01-08-2009, 12:53 AM	#4
rico7769 Hybrid67 Join Date: Jan 2009 Location: Martinez, GA Posts: 195	Re: heater hoses to engine swapped? Hose sizes coming from the heater core should be sized to accomodate the correct fitting on the intake and the water pump. I found out I had mine switched by forcing the wrong hose onto the bottom of the heater core and snapping it off. Not fun replacing stuff due to ignorance. I have the top hose from the core into the intake and the bottom to the water pump. I haven't had any issues. Hope this helps. Not really sure what the outcome is of switching them.

01-08-2009, 01:03 AM	#5
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater hoses to engine swapped? i just went out to make sure and mine are matched up the same way. this came up because my truck started heating up tonight and not sure why ...i have been driving it for a while and its been doing fine and all the sudden tonight it went to 210 i have a 180 thermostat in it the only thing i can think of is that it went bad or is stuck. guess ill go buy another one tomrrow. anyone have any other ideas?

01-08-2009, 01:21 AM	#6
WorkinLonghorn Senior Member Join Date: Dec 2006 Location: Studio City, Calif. Posts: 2,883	Re: heater hoses to engine swapped? The two are different sizes,as mentioned above,( 5/8" and 3/4" IIRC) but I don't see how having them reversed would cause any problem at all. On mine, I have bypassed the heater altogether and there is no difference. __________________ '69 GMC C2500 Custom Camper, 8 1/2' bed, New GM 350, NP 435 Close Ratio 4spd. Trans., 3.73 Dana-60 open.Camper and Trailer wiring, PS, PB, AC, tach , three gas tanks, stereo speakers, 2nd owner, Work-Truck supreme.

01-08-2009, 12:35 AM	#1
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	heater hoses to engine swapped? just out of curiousity what would happen if someone were to swap the two hoses going to and from the heater that connect to the intake and to the water pump? what would be the effects if any? would it cause the engine to over heat?

01-08-2009, 01:27 AM	#8
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater hoses to engine swapped? i kind of ruled the hoses out as reason for the overheating but i figured id ask anyway. now on to figure out the real cause. gotta sart someone right?

01-08-2009, 03:35 AM	#9
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,693	Re: heater hoses to engine swapped? having them swapped would not anve any ill effects on your engine, heater, air temp, nor coolant temp. If you managed to pull it off.... no one would ever know. Till one popped off due to size incompatibility anyways.

01-08-2009, 08:06 AM	#10
truckdude239 Senior Member Join Date: Sep 2005 Location: Lewisville, Nc Posts: 10,237	Re: heater hoses to engine swapped? 210 is still normal to me i like to see cars run between 180-215. course the cool the motor the better the preformance __________________ David fuller Ase Certified Mechanic Click here to help support our board!! 1971 Chevy c-10 under going a 4.8l LSx swap Build Thread http://67-72chevytrucks.com/vboard/s...d.php?t=421305 2007 Honda Accord my daily 145kmiles 2002 Honda Accord 4 door With 330k(sisters car) 2005 toyota Avalon 228k( brothers car) 2002 Sububran 5.3 245k 2000 Tahoe 5.3l 378 General manager for Marco's Carwash & lube

01-08-2009, 11:23 AM	#11
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,648	Re: heater hoses to engine swapped? - #1 - Make sure your fan belt is tight.... LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 -

01-08-2009, 11:53 AM	#12
kulturekat Registered User Join Date: Dec 2007 Location: stillwater, oklahoma Posts: 566	Re: heater hoses to engine swapped? 210 just scares me ive never had a car or truck run that hot. but ive heard that from someone else that that is normal as well. the only other hting is that when it gets to 210 it smells hot. i didnt think of the fan belt ill check that this afternoon

01-08-2009, 01:37 PM	#13
LockDoc The Older Generation Join Date: Aug 2006 Location: Montezuma, Iowa Posts: 25,648	Re: heater hoses to engine swapped? - I had an experienced mechanic here in town recommend a warmer thermostat in my 327 based '36 Ford Coupe. I had a 185º in it and he recommended a 195-200º. I followed his recommendation and for the first few days it smelled hot too but it went away after driving it for a while. I don't consider 210º a problem. If it boils over... that's a problem.. LockDoc __________________ Leon Locksmith, Specializing In Antique Trucks, Automobiles, & Motorcycles (My Dually Pickup Project Thread) http://67-72chevytrucks.com/vboard/s...d.php?t=829820 - Last edited by LockDoc; 01-08-2009 at 01:38 PM.

01-08-2009, 01:54 PM	#14
BLACK AND BLUE 67-72 Firefighter Join Date: Feb 2001 Location: Yellville, Ar, USA Posts: 1,943	Re: heater hoses to engine swapped? It will work fine, and the hoses can be reversed, it is just a real pain trying to get 5/8 hose over a 3/4 fitting, but it will fit!!!! __________________ '72 Chevy SWB 350 Auto '67 GMC LWB 350 4 speed '70 Chevy 4x4 Stepside 350 Auto Yellville, Ar. USA

01-08-2009, 08:36 PM	#16
PanelDeland I am a Referee of life. Join Date: Jun 2000 Location: Greensboro N.C. Posts: 13,993	Re: heater hoses to engine swapped? I reversed mine.I don't remember having a problem getting them on and haven't had a problem keeping them on.I'm kinda AR about stuff and didn't like the hoses crossing under the hood.When I asked someone else said they had done the same for the same reason. __________________ The 47-present Chevrolet and GMC Truck Message Board Network,it's owners,moderators,members,and associates of any type should not be held responsible for my opinion. You can't fix stupid,not even with duct tape. "My appearance is due to the fact that "GOD" does punish you for having too much fun!" Barrett-Jackson has perfected alchemy,they make rust into gold! "You can lead a horse to water but you can't saddle a duck" "Cleverly disguised as a 'Responsible Adult' "Sometimes your Knight in shining armor is just a retard in tinfoil"



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