Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!
Sponsored by:
Sponsored by: CARiD

Can I run the heater hose to the radiator instead of the manifold?

Thread Tools
 
Search this Thread
 
Old Jan 1, 2001 | 07:49 PM
  #1  
Biochem's Avatar
Thread Starter
Senior Member
 
Joined: Aug 1999
Posts: 950
Likes: 0
From: This spot right here --->*
Car: 2002 SOM z28
Engine: LS1
Transmission: T-56
Can I run the heater hose to the radiator instead of the manifold?

So right now, my heater hoses run from my water pump and then back to the intake manifold (or vise versa). That port on the intake manifold could be used for other things like a temp sensor for the second fan...

I have a port in my radiator right below the cap that is blocked off with a rubber cap. Instead of running the heater to the intake manifold, could I run it directly to the radiator? Would there be any cooling advantages to this? Mostly I am looking at the port though...

------------------
1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-
Reply
Old Jan 1, 2001 | 07:57 PM
  #2  
Vader's Avatar
Moderator
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2000
Posts: 19,668
Likes: 314
Bio,

You really need to maintain coolant flow through that passage to prevent hot spots in the heads. You can get around it if you modify your heads like LT1/4 heads and install a crossover coolant line, but there are probably better places to install a CTS than the coolant discharge on the right head.

If you need to install another sensor, i have a couple of suggestions, like a modified water outlet or using one of the extra holes on the heads or drain ports on the block.

------------------
Later,
Vader
------------------
"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0
Reply
Old Jan 1, 2001 | 07:59 PM
  #3  
ede's Avatar
ede
TGO Supporter
 
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
we got in to this on my sons car. can't remember exactily what he did now. on most cars the heater hoses go to the intake and the water pump. i don't see why you couldn't, but i'm not 100% sure on it. give it a try and see what happens, doesn't take too much to change it back.

------------------
ICON Motorsports
1st & 3rd
Reply
Old Jan 1, 2001 | 08:02 PM
  #4  
ede's Avatar
ede
TGO Supporter
 
Joined: Aug 1999
Posts: 14,811
Likes: 1
From: Jackson County
he did use the intake for a temp senser i remeber that and didn't have any problems.

------------------
ICON Motorsports
1st & 3rd
Reply
Old Jan 1, 2001 | 08:05 PM
  #5  
Biochem's Avatar
Thread Starter
Senior Member
 
Joined: Aug 1999
Posts: 950
Likes: 0
From: This spot right here --->*
Car: 2002 SOM z28
Engine: LS1
Transmission: T-56
I think I would need a longer heater hose to run it to the radiator. It isn't something that I will do tomorrow, but I will look into it.
Reply
Old Jan 1, 2001 | 08:16 PM
  #6  
RB83L69's Avatar
Supreme Member
 
Joined: Jul 1999
Posts: 18,457
Likes: 16
From: Loveland, OH, US
Car: 4
Engine: 6
Transmission: 5
No. That will not work.

The nipple on the manifold is "hot" water (pressure side of the pump and outlet from the motor to the radiator), and the one on the radiator is "cold" (suction side of the pump and return of cooled water to the block). The one on the water pump is also on the "cold" suction side. In order for the heater to work you have to have one hose on the "hot" side of the system, and one on the "cold" side. The water pump only moves water in that direction, from "hot" to "cold"; it won't make water flow from one "cold" to another "cold".

You could hook the heater hose to the radiator instead of the water pump; but that frees up a "cold" side fitting, not a "hot" one. It wouldn't work for a fan switch.

If you want extra ports on the "hot" side, you'll probably have to put a "T" fitting someplace. What are you really wanting to do, and maybe somebody has an idea what a good way to do it is?

------------------
"So many Mustangs, so little time..."
Reply
Old Jan 1, 2001 | 08:27 PM
  #7  
Biochem's Avatar
Thread Starter
Senior Member
 
Joined: Aug 1999
Posts: 950
Likes: 0
From: This spot right here --->*
Car: 2002 SOM z28
Engine: LS1
Transmission: T-56
Makes sense. I see how Ed's idea will work (using that port on the radiator) but mine won't (using the port on the maifold for the fan sensor).

I have another port in the maifold, but the iron plug that is in the WON'T come out... I may have to try some more I guess.
Reply
Old Jan 1, 2001 | 08:39 PM
  #8  
Vader's Avatar
Moderator
25 Year Member
Liked
Loved
Community Favorite
 
Joined: Jan 2000
Posts: 19,668
Likes: 314
Bio,

Fan sensor? Well, why didn't you SAY so in the first place? This was a good location for mine:



Actually, the guy at the parts counter had a different suggestion about where I could install it, but only after I made some comment about his Mousetank....

------------------
Later,
Vader
------------------
"No matter how hard you try you can't stop us now"
Adobe Acrobat Reader 4.0
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
eightsixseven
Tech / General Engine
2
Dec 16, 2024 01:50 PM
1992 Trans Am
History / Originality
27
May 10, 2023 07:19 PM
Reddeath210
Firebirds for Sale
14
Oct 6, 2015 08:20 AM
TheExaminer
Cooling
26
Aug 26, 2015 04:59 PM
lakeffect2
Cooling
11
Aug 23, 2015 08:44 AM




All times are GMT -5. The time now is 10:51 PM.