Tried to backflush heater core, didnt work. help!
#18
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 15 Likes
on
15 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
Howdy DJB, been missing you...As far as CLR..lawyers maybe? (it might work, or be helpful, but not be OK to say it? )
Curious about your .02 over here> https://www.cherokeeforum.com/f2/ren...-weird-199792/
Curious about your .02 over here> https://www.cherokeeforum.com/f2/ren...-weird-199792/
My $0.02 is, throw money and parts at it......as in all the parts in the entire cooling system. U know me, I despise multiple coolant drain/refills guessing at what part to replace next. Threads r few and far between that say "I've replaced the entire cooling system and it still overheats".
#19
CF Veteran
Join Date: Jan 2014
Location: District of Columbia
Posts: 1,329
Received 285 Likes
on
215 Posts
Year: 1998
Model: Cherokee (XJ)
Engine: 4.0
My house is at 65 psi with a pressure reducer, but it comes in from the street at 105-110 psi depending on the time of day. The front spigot is upstream of the pressure reducer, so it's like a fire hose. Great for cleaning mud off the Jeep. Works well on the neighbors cats as well, but you didn't hear that from me.
#20
Banned
Join Date: Feb 2014
Location: Florida
Posts: 2,379
Likes: 0
Received 17 Likes
on
16 Posts
Year: 2000
Model: Cherokee(XJ)
Engine: Golen 4.6L
Because you told us not to.
Seriously, though, CLR is supposed to take the finish off copper and aluminum, so that's probably the reason why they recommend against using it. But if you've tried everything else, and the alternative is to spend a whole day pulling your dash to replace the heater core, I don't see what it could hurt. The worst that could happen is it eats through the metal and springs a leak, in which case you're no worse off than when you started.
If nothing else had worked, I'd chance it, just being sure to rinse the holy hell out of it before hooking the heater hoses back up.
Seriously, though, CLR is supposed to take the finish off copper and aluminum, so that's probably the reason why they recommend against using it. But if you've tried everything else, and the alternative is to spend a whole day pulling your dash to replace the heater core, I don't see what it could hurt. The worst that could happen is it eats through the metal and springs a leak, in which case you're no worse off than when you started.
If nothing else had worked, I'd chance it, just being sure to rinse the holy hell out of it before hooking the heater hoses back up.
#21
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 15 Likes
on
15 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
I believe that's CLR's concern....not being able to totally flush it out due to the fact that both the inlet and outlet r at the top of the heater core, making it a little difficult to flush up.
#22
Newbie
Join Date: Sep 2013
Location: K-Zoo, Mi
Posts: 29
Likes: 0
Received 0 Likes
on
0 Posts
Year: 2001
Model: Cherokee
Engine: 4.0L, 784 Injector Swap
Drain the radiator and add some Coolant flush <-- whatever brand suits you. Then fill remaining with water.
Drive for a few days for it to work. Drain radiator again. Fill back up with water. Drive for a little then drain again, to make sure you get the crud out. Flush you heater core also with a garden hose, use a bit of light shop air if you can 10psi.
Fill with coolant water mix and enjoy your heat. Had to do the whole thing twice to my 01 xj when i first got it. I couldnt get heat and the GF would not drive it because of the no heat.
Just my 2 cents.
Drive for a few days for it to work. Drain radiator again. Fill back up with water. Drive for a little then drain again, to make sure you get the crud out. Flush you heater core also with a garden hose, use a bit of light shop air if you can 10psi.
Fill with coolant water mix and enjoy your heat. Had to do the whole thing twice to my 01 xj when i first got it. I couldnt get heat and the GF would not drive it because of the no heat.
Just my 2 cents.
Thread
Thread Starter
Forum
Replies
Last Post
jmsummers2012
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
55
08-21-2024 05:22 PM
pmd1995
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
3
07-29-2017 07:58 AM
bradleyheathhays
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
6
10-03-2015 09:51 PM
Silentj
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
10
10-02-2015 01:24 PM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)