Heater hose Tee connections

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Doubeleive

Wes
Supporting Member
Joined
Nov 7, 2017
Posts
24,549
Reaction score
36,207
Location
Stockton, Ca.
How common do the heater hose connectors at the firewall fail? I have a 2010 Tahoe with 144k miles and wondering if I should proactively change them? Anything else need proactive replacement? Thanks
my experience has been they can fail anytime after 10 years the plastic gets brittle from being subjected to hot/cold over and over. if yours are the original 13 year old one's I would replace them. I now replace mine at 5 years just for good measure, because when those blow out (at any time) you generally do not know it has happened unless you are stopped and see steam. moving they just blow all the coolant out and you overheat and if you are not paying attention you do not even know until it either looses power or you get reduced engine warning and by then you have already overheated and you don't get too many chances when overheating a engine once or twice and you most likely fine but more than that and you are risking serious engine damage.
and if they do not flat out break off then they will just slowly leak coolant out until you end up in the same position as above unless you are studious about checking under the hood or notice a puddle in the garage or driveway.
 

OR VietVet

Multnomah Falls
Supporting Member
Military
Joined
Oct 8, 2014
Posts
19,785
Reaction score
33,482
Location
Willamette Valley
I had a very slow leak from them on my 2005. I did them about 1 year ago. Do them now if you have never replaced before. They will "give up the ghost" but never in your driveway. Although, I must say, I found mine leaking in my driveway.
 

Joseph Garcia

Supporting Member
Joined
Aug 2, 2018
Posts
6,831
Reaction score
9,022
I agree with the comments above. At your mileage, you should replace the Tees and ALL cooling hoses in the engine well. You can see the manufacture date stamped on the hoses, and I'll bet that yours are the original hoses. For Tees, use only OEM plastic Tees (no Dorman Tees), or use metal Tees made by Gruven.

I can tell you from personal experience that losing a Tee or the heater hose that connected to the Tee will empty your motor of coolant within 60 seconds.


Cooling Tee Hose Rupture.jpg

Last, when you replace the Tee, use gloves, as the insulation on the fire wall is quite aggressive, or your hands will be itching for a few days.
 

Plimbob

Full Access Member
Joined
Sep 5, 2014
Posts
349
Reaction score
215
Location
Des Moines Iowa
My 07 went at about 195,000, in eastern MT pulling a boat to Fort Peck. It was a real PIA situation. Luckily, I carry a tool box on trips like that and had some radiator clamps and water. Gerry rigged it, to get to the next town. No parts available so had to improve on the gerry rigging and fill with coolant. Drove it on to Ft Peck, fished a week and drove it back home about 1,200 miles in total to and fro on the patch work. Watched it like a hawk as you can imagine.

My humble suggestion, if you're past say 125k replace it.
 

Geotrash

Dave
Supporting Member
Joined
Feb 16, 2018
Posts
5,862
Reaction score
14,183
Location
Richmond, VA
Ok, I’m the original poster. Had the work done at local Chevy dealer and the tees and hoses replacement were by far most expensive part of repairs. About $750 + for that with labor being $450 of that.
Wow. What a ripoff! I've done it on 3 of these vehicles now and it never took me more than an hour - including the first time. Now it's more like 30 minutes, and that's if I change the heater hose with the wye in it all the way down to the water pump.
 

Forum statistics

Threads
130,398
Posts
1,831,776
Members
94,010
Latest member
coachkeifer

Latest posts

Top