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Username Post: More T.B. Problems, Now Leaking!!        (Topic#362681)
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-22-20 09:55 AM - Post#2804055    

Hello;
I put a couple post here about the problem I had recently with my Trailblazer! Well, I got a new Thermostat installed (that seems to have fixed the previous problems) but not before the shop had tried wrenching on the temp sender! Well, as luck would have it, I Find my coolant level is diminishing and I took it back to the same shop and the guy says that one of my heater hoses is leaking and he didn't want to do that repair! So, here is what I found out!
The hoses that supply the heater core are not available from Anywhere!? There are some other parts that can be substituted!
It's a "YOYAL PAIN!!" to do this repair (connections way back on the firewall) on my TB with the 4.2 engine!?
My question is: Has any of you had this experience, and what did you do? Part numbers? ????
Also I am kind of suspicious that the leak may be from the temp sender as the shop had said they were afraid of breaking off that sender in the engine block! YOU KNOW ONCE YOU TINKER! YOU HAVE RELEASED THE BARREL OF MONKEYS!!!!

Bruce



 




gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 01:56 PM - Post#2804072    
    In response to Bruces 57

Yea, GM suv heater core hoses are a PIA to replace. I fixed our Acadia recently. Instead of using factory assemblies or parts, I made my own. The T's are plastic. Coolant hoses are cheap. I ordered metal T's and bought new hoses. The hoses are two different types.

I use a mallet and long screw driver to break off the quick connect fittings. Once they are off, new hoses go on. It might be little tight get back there with a socket or screwdriver. Worm gear clamps make the job easier. I'll post pictures.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 02:08 PM - Post#2804074    
    In response to gchemist

Metal connectors last longer than plastic quick connects.

Attachment: hose1.jpg (106.86 KB) 6 View(s)


Quick cut on crimp parts.


Attachment: hose2.jpg (149.12 KB) 4 View(s)


Quick connect.


Attachment: hose3.jpg (73.88 KB) 6 View(s)


Old part.


Attachment: hose4.jpg (142.76 KB) 5 View(s)


New metal T assemblies.


Attachment: hose5.jpg (109.81 KB) 5 View(s)


Metal T and connectors complete the work.


'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 02:10 PM - Post#2804075    
    In response to gchemist

Tip on how to remove the quick connect fitting.

https://www.youtube.com/watch?v=S1_ob3cXhr0

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-22-20 02:15 PM - Post#2804078    
    In response to gchemist

Hello;
Yes Photos would be nice as well as the replacement parts and where you bought them.
I did see that Gates has a inlet hose, like the original, that hose goes from driver side to the inlet and then the outlet goes someplace on the passengers side, very hard to see!! Too Much "junk" in the way!!
I see that once the old hoses are off, There are some new plastic ends to re attach and then use regular heater hose to connect to those via hose clamps.
Do you happen to know just where the temp sender is located? (someplace on the passengers side???)

Bruce



 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-22-20 02:28 PM - Post#2804079    
    In response to Bruces 57

Hello;
WoW! How could u get a camera in there for the photos!??
My model is the 08 year and I believe that my hoses (I followed the ac hoses) is located further down the firewall! has a bunch of heat shield on it on that passengers side!
Im not really sure I need a "T" ?? I see one hose from the drivers side attached to the firewall with 2 little bolts, this line is kind of like a AC line it is hose at the connection and then it goes to a aluminum line and just before the firewall it converts back to a rubber hose that connects to the heater core!
Thanks,

Bruce



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 03:05 PM - Post#2804084    
    In response to Bruces 57

Does yours have a rear heater option? If it does, it likely has T connections. GM quick connects are notorious for leaks and breaking. Once late at night, I bypassed a heater core on a '08 Yukon. I cut the hoses and connected them together. The owner went all summer like with a bypass. It was not until the wife complained of not having heat he called back for final repairs. I did the same thing too. New hoses and worm gear clamps. Cheaper than replacement quick connects too.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 03:11 PM - Post#2804086    
    In response to gchemist

Go to www.rockauto.com.
Check the heater hose connector link for your model.
https://www.rockauto.com/en/catalog/chevrolet, 2008...

The site indicates it has quick connects and straight pipe connectors. The inlet is a metal fitting. The fitting easily accepts a hose and clamp. Hoses are 3/4" and 5/8".

If I remember correctly, the temp sensor is on the block driver side. Some year models required removal of accessories to reach the temp sensor.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-22-20 03:20 PM - Post#2804088    
    In response to gchemist

"06 4.2L do have it on the right side (passenger side).
It's right past the exhaust manifold under wiring.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-23-20 06:34 AM - Post#2804133    
    In response to gchemist

Hello;
WoW!!! what a PIA Job!!!!
As I am thinking of doing this Im seeing and starting to believe that my 75 year old body doesn't know how to contort enough to get this job done !!
Im going to give everything a closer look (almost impossible) and try to snap a couple pix of this and determine just where the leaking is!!!!
Im thinking that if the sender isn't leaking, don't fix it!!! I can see easy outs in my future for that part!!!!

Bruce



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-23-20 11:04 AM - Post#2804158    
    In response to Bruces 57

Do you see any coolant after parking overnight? For it's age, I would suspect a coolant hose. Use a mechanic mirror and light. It's easier to reach down with a small mirror. Myself, I have two cameras to reach tight spaces. One has a ~20" reach. One has a 30" optical lighted end to reach really tight spaces.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-27-20 03:44 PM - Post#2804395    
    In response to gchemist

Hello;
Standing on my stool. I did manage to get my hand in where the in and out of the heater was but I did not have any wetness on my hand
Yes, If you look at the passenger side outside the car the bottom lip of the inside fender cover is showing signs of leaking from someplace!
The smell of coolant is present on that side as well, not the Drivers side!
Bruce



Edited by Bruces 57 on 09-27-20 03:46 PM. Reason for edit: No reason given.

 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-28-20 04:10 AM - Post#2804408    
    In response to Bruces 57

Bruce,
Find a coolant system pressure tool. The local parts store has them for temporary use. Putting pressure on the system will help find the leak. Pump it up to the radiator cap rating. Usually 16 PSI or less. You may need to lift it up and look up at the heater core hoses. T's for rear heater options are way in the back.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-28-20 10:49 AM - Post#2804441    
    In response to gchemist

Hello;
Found at least one problem! The temp sensor in leaking. I remember that when the guy put in the thermostat they had tried to wrench on that and they were afraid to break it off in the block,
Well, dealer says that if it comes out (unscrews) its about a 200 job but if it breaks off, I'm looking at 1300!!! they have to dis assemble the engine to fix that (Bunch of BS!!) so guess who's going to fix my car? ME!!! (again!)
Bruce



 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-28-20 02:01 PM - Post#2804451    
    In response to Bruces 57

Soak it with some PB blaster if it's cold. Or use a socket when it's hot. You would need cut off the harness. It's brass, it has to be melted on if its going to break. It's an o-ring design. A new o-ring would probably fix it. I think you'll be okay.

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-28-20 02:06 PM - Post#2804452    
    In response to gchemist

Seems the inside is hollow. If it breaks off, you can use an extractor to get it out.

This guy used and extractor. He even shows the broke end.
https://www.youtube.com/watch?v=X7TRREGKlao

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
gchemist 
Member #271 Senior Chevytalk Moderator
Posts: 25273
gchemist
Loc: Austin, TX 78748
Reg: 05-09-00
09-28-20 02:11 PM - Post#2804453    
    In response to gchemist

Wow, you can raise the body too!!
"Think like the manufacturer!" Especially if breaks off!

https://www.youtube.com/watch?v=lrcL33zhvEU

'83 Silverardo XST - ZZ4 powered
'95 Jimmy SLT (Bought @131,814)
'96 GMC Jimmy LS Ret. @236651 miles
'08 GMC Acadia 3.6L SLE


 
Bruces 57 
Frequent Contributor
Posts: 2456

Reg: 01-03-07
09-30-20 06:33 AM - Post#2804548    
    In response to gchemist

Hello;
Well, I did one better!!! It seems that the lady that cuts our hair, her husband has a "automotive shop" near by. So I took the TB to him!
The way I figure it, (I took my wife to their house for hair) anyone that can catch wild birds and put them in a cage at their house, is WAY more patient than Ill ever be!! WAYYYYY!!!
SO!, $150.00 later, job was done!
There is one thing I know is that (since vacationing in Philippines) the ingenuity of most of those people is unbelievable!
So, Job done! and I found a new shop to take my car to. It seems so, a lot of other folks have too!! Small Shop 5 guys (Vietnamese) running all over the place!! You can hardly drive in to the place!
OH! did I mention that they checked my TB and added a quart of oil too!!!
This is the kind of place where the American Dream is very much alive!!!!

Bruce



 




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