• When you click on links to various merchants on this site and make a purchase, this can result in this site earning a commission. Affiliate programs and affiliations include, but are not limited to, the eBay Partner Network.

Weeping heater hose

71_Duster said:
Mine did that too. Only when it sat for months not running in the winter. Summer time they where dry as a bone never lost any coolant. (Until the heater core went)

Just ran home mix of prestone green coolant. No uphill leaks on mine, no puddles no coolant smell or steam they just seemed to sweat. Mine where a local parts store brand of heater hose.
Click to expand...

Well it's just not mine then, when I'm daily driving it their fine also.
 
If you would wipe them off with a white rag or paper towel, the green coolant would show on the towel.
 
It does, doesn't matter now though I cut em off and have moved on. Not a biggie.

IMG_0115.JPG
 
68 HEMI GTS said:
Well it's just not mine then, when I'm daily driving it their fine also.
Click to expand...
That is interesting, my car sits a lot during the winter, I usually start it once a month if the weather is good, the hoses have been on the car for almost 4 years now, and I have never seen that issue. I am using Gates Premium heater hose and running a 50/50 mix.

I was noticing the proximity to the header tube on that side, but mine are also fairly close to headers and I have not had that issue.

This is quite the mystery!
 
PurpleBeeper said:
Silicone hoses & gaskets can deteriorate from exposure to 2-ethylhexanoic acid, which is in DexCool & Peak Long Life green antifreeze.
Click to expand...
Not sure I buy that. The Cadillac Northstar has had Dex from day one (1992 or so) and they have always used a short green silicone hose below the TB because it got rather hot and access was difficult. Never saw (or any other hose on a Northstar) deteriorate due to Dex-Cool.
 
Ranger16 said:
Not sure I buy that. The Cadillac Northstar has had Dex from day one (1992 or so) and they have always used a short green silicone hose below the TB because it got rather hot and access was difficult. Never saw (or any other hose on a Northstar) deteriorate due to Dex-Cool.
Click to expand...

I understand you being skeptical. fyi- Cummins has banned all coolant containing 2-EH because "some" of their engines get the "high performance" silicon hose option....just saying.
 
Just another thought, are you running a high volume water pump? Just was thinking that may if you are its putting too much volume through the heater hoses or too high of a pressure in those hoses causing the coolant to permeate the hose? Also, what about the radiator cap, what pressure cap are you running?
 
I have had the same issue with two different vehicles within the last 30 years. Just seem to sweat out coolant while they sat.
 
what size lines are those

i had power sterring return lines that were sweating. they were made of heater hose

i replaced it with some Gates fuel line from Orileys. they carry 3/8 and 5/8
 
Switch hose brands. We used to see it on A/C hose and PS hose at the Dealer. Little green dye dots would show up. My hose is 15 years old and doesn't leak a drop. Car sets a lot as well.
Doug
 
I'll definitely be trying something different, got a few other things to fix first. These somewhat nice days for February are starting to get me motivated!
 
You must log in or register to reply here.

Similar threads

68HemiRR
  • Locked
SOLD OEM Heater Hose Bracket
Replies
0
Views
198
68HemiRR
68HemiRR
R
  • Locked
SOLD 1968 HEATER HOSE CLIP
Replies
0
Views
500
robert horman
R
Dakar Timm
Coolant flushing
Replies
15
Views
738
RemCharger
RemCharger
L
What is the purpose of the small rubber hose attached to the heater motor on firewall 1966 Satellite ??
Replies
1
Views
515
R413
R
Texas charger 73
Heater hose
Replies
4
Views
916
Texas charger 73
Texas charger 73
Auto Transport Service
Back
Top