Last post on Jul 16, 2013 at 4:58 PM
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Chevrolet Blazer, GMC Jimmy, SUV
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#2683 of 3676 Re: Dexcool spilling like a waterfall from under heater core [repairdog]
Sep 27, 2006 (5:44 am)
Was wondering, I figured that my Heater core went bad when I had the puff of steam coming from the vents. I was afraid it would start leaking into the car so I unplugged the hose from the core. Can I remove and install the heater core myself (Don't have $600+) or is there something else I can do to it. I have flushed it before and it still had the puff of steam which really stinks. it a 1999 Chevy Blazer 4.3L. Thanks
#2684 of 3676 Re: Dexcool spilling like a waterfall from under heater core [rauldevo]
Sep 27, 2006 (11:36 am)
Sorry, once that happens the core blew a pinhole and will do so again probably each time it heats up. Have to pull the dash completely out to get to the heater box so takes 6 hours. I had the dealer do mine cause I don't bent in those ways anymore. You can bypass the core and all stores sell a 5/8 to 3/4" adaptor to do it but no heat then. Stop leak only makes the whole system worse over time. Love that Dex cool smell - like burned maple syrup barf! So far both my 98s and my 99 blew theirs around 90-100k miles. Waiting for my 01 next!
#2685 of 3676 Re: 96 Blazer coolent leak [repairdog]
Sep 27, 2006 (6:23 pm)
Hey. My "recently traded for" '99 blazer had NO heat when I checked it for the upcoming heater season.
Luckly,I flushed out the "crud" from the heater core with only slight pressure from a water hose and the heater with climate control does a good job
Now, from a TIP I was given long ago by a friend that owned a radiator shop. I have added a cup of laundry detergent and
refilled the system and drive it normally for a coupla weeks.I plan to drain and do a good "hose and thermostat removed" flush soon.
Here's the "THING" ...... I'm not familiar with DEXCOOL and
I'm reading some bad things about it. So .....
I plan to replace Dexcool with 50/50 Zerex and water.
Is there really anything wrong with this ??
#2686 of 3676 Re: 96 Blazer coolent leak [uppercreek]
Sep 28, 2006 (4:18 am)
If you flush it before the crud clogs the core totally up and do not get air in the system you usually are OK. Dex cools major problem is if air gets in the system from the stupid 5/100 warranty BS - no one watches the coolant res so it drops and air sucks in and presto - big mess. The GM cap was and may still be junk too so buy a Stant cap for the radiator to allow movemant between rad and res.
As for the detergent - not something I'd ever do - these aluminum radiators are PH sensative. As for the old green you can convert after a flush the articles all state. Both types need a min 3 year replacement cycle!
#2687 of 3676 Re: Hey repairdog [repairdog]
Sep 28, 2006 (2:31 pm)
You are not going to believe this! I just left the shop that's fixing the transmission on the Jimmy, you will never believe what the problem is!! The idiot who owned it before me super-glued everything that goes to the transmission to the transmission! All of the wire plugs, parts, everything! Because of it my neutral shift selonoid went out and another piece that goes to the trasmission (not sure what it's called but the Jimmy won't start without it) had to be broken to be removed so I had to have it replaced with the transmission. Super glue! I'm in shock, literally!
#2688 of 3676 Re: 96 Blazer coolent leak [uppercreek]
Sep 28, 2006 (9:28 pm)
HEY THANKS !!
Heater is still OK. So I'll get the detergent all flushed out and refill with 50/50 zerex and H2O
Hopefully the new zerex will neturalize any PH left from detergent !! We'll see !!
#2689 of 3676 Re: 98 Blazer door locks on its own after 20 minutes [repairdog]
Sep 30, 2006 (9:29 pm)
I HAVE A 2001 BLAZER WITH AN AFTERMARKET ALARM FROM CLIFFORD ALARMS MY DOORS LOCK ON ITS ON AFTER ABOUT 10 MIN. SO I CHECKED WITH CLIFFORD ABOUT IT AND IT IS DESIGNED THAT WAY. IT HAS A VALET MODE DESIGNED TO LOCK THE DOORS AFTER A SET TIME.
#2690 of 3676 Re: Blazer Air conditioning cold-hot-cold [shansings2]
Oct 03, 2006 (2:36 pm)
I have a similar problem with my '97 GMC Jimmy. When I turn the heater on to either of the defrost settings the air conditioner kicks in and runs until I change the heater setting. The air conditioner seems to run fine on the A/C settings?
#2691 of 3676 Re: Blazer Air conditioning cold-hot-cold [bensch]
Oct 04, 2006 (1:17 am)
I believe the A/C compressor is suppose to cycle during defrost mode. It helps keep the seal lubricated during the season that it is not used (winter). It shouldn't be blowing cold air.
#2692 of 3676 Re: Noise in front end [tthomson]
Oct 04, 2006 (5:29 pm)
Im having the exact same problem on my 97 chevy blazer,
did you ever figure out what the problem is?