Upper transcooler line leaking
#1
Senior Member
Thread Starter
Join Date: Jan 2015
Location: Anderson, SC
Posts: 641
Likes: 0
Received 1 Like
on
1 Post
Year: 1999
Model: Cherokee
Engine: 4.0
Upper transcooler line leaking
I have 1999 4.0 with a leak at the fitting that threads into the radiator. Is Teflon tape an option? It looks like it is just leaking right at the fitting.
I've looked at a ton if threads, it seems most people have trouble with the rubber part but I think my only leak is at that fitting.
I've looked at a ton if threads, it seems most people have trouble with the rubber part but I think my only leak is at that fitting.
#2
Seasoned Member
Join Date: Aug 2014
Location: Lehigh Valley PA
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0 renix
Said it before and I'll say it again...
If the leak is bad enough, it isn't worth dealing with these fittings either on the rad or back down the line a bit at the quick disconnects.
Just cut the lines and run them straight up to a B&M trans cooler in front of the radiator, however you want to mount it (~$60, Amazon) and run hose clamps.
It sounds like work and money, but having to deal with those lines is worth the $60 for the "upgrade". Done it on 2 XJ's already.
As an added bonus, the trans lines will then be out of the way if you ever need to drop the pan.
If the leak is bad enough, it isn't worth dealing with these fittings either on the rad or back down the line a bit at the quick disconnects.
Just cut the lines and run them straight up to a B&M trans cooler in front of the radiator, however you want to mount it (~$60, Amazon) and run hose clamps.
It sounds like work and money, but having to deal with those lines is worth the $60 for the "upgrade". Done it on 2 XJ's already.
As an added bonus, the trans lines will then be out of the way if you ever need to drop the pan.
#4
Senior Member
Join Date: Sep 2014
Location: Saginaw Mi area
Posts: 580
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1994
Model: Cherokee
Engine: 4.0
There has been discussion on other forums about the trans fluid running too cool/cold at start-up in real cold weather, with just the separate cooler.
Some folks run them in series with the cooler in the radiator, like down-stream from the radiator cooler.
On another note, buying new cooler lines to go to the radiator is likely not cheap either...(?)
Just some observations.....
Some folks run them in series with the cooler in the radiator, like down-stream from the radiator cooler.
On another note, buying new cooler lines to go to the radiator is likely not cheap either...(?)
Just some observations.....
#5
Senior Member
Thread Starter
Join Date: Jan 2015
Location: Anderson, SC
Posts: 641
Likes: 0
Received 1 Like
on
1 Post
Year: 1999
Model: Cherokee
Engine: 4.0
Said it before and I'll say it again...
If the leak is bad enough, it isn't worth dealing with these fittings either on the rad or back down the line a bit at the quick disconnects.
Just cut the lines and run them straight up to a B&M trans cooler in front of the radiator, however you want to mount it (~$60, Amazon) and run hose clamps.
It sounds like work and money, but having to deal with those lines is worth the $60 for the "upgrade". Done it on 2 XJ's already.
As an added bonus, the trans lines will then be out of the way if you ever need to drop the pan.
If the leak is bad enough, it isn't worth dealing with these fittings either on the rad or back down the line a bit at the quick disconnects.
Just cut the lines and run them straight up to a B&M trans cooler in front of the radiator, however you want to mount it (~$60, Amazon) and run hose clamps.
It sounds like work and money, but having to deal with those lines is worth the $60 for the "upgrade". Done it on 2 XJ's already.
As an added bonus, the trans lines will then be out of the way if you ever need to drop the pan.
#6
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
There has been discussion on other forums about the trans fluid running too cool/cold at start-up in real cold weather, with just the separate cooler.
Some folks run them in series with the cooler in the radiator, like down-stream from the radiator cooler.
On another note, buying new cooler lines to go to the radiator is likely not cheap either...(?)
Just some observations.....
Some folks run them in series with the cooler in the radiator, like down-stream from the radiator cooler.
On another note, buying new cooler lines to go to the radiator is likely not cheap either...(?)
Just some observations.....
#7
Seasoned Member
Join Date: Aug 2014
Location: Lehigh Valley PA
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0 renix
That's just one option, running it with the factory cooler, but it defeats the purpose of killing 2 birds with 1 stone and eliminating the connections at the factory radiators.
Running a new B&M by itself is still going to for sure be cooler even by itself than the stock trans cooler anyway, and even if not owell, it stays cool enough either way, myself and a few friends I know just do this to eliminate the "quick" disconnects and radiator connections.
Running a new B&M by itself is still going to for sure be cooler even by itself than the stock trans cooler anyway, and even if not owell, it stays cool enough either way, myself and a few friends I know just do this to eliminate the "quick" disconnects and radiator connections.
Trending Topics
#8
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
...........Running a new B&M by itself is still going to for sure be cooler even by itself than the stock trans cooler anyway, and even if not owell, it stays cool enough either way, myself and a few friends I know just do this to eliminate the "quick" disconnects and radiator connections.
Eliminating the Factory cooler and not using a tranny fluid temp gauge to verify all is good, is a gamble. Do u and your friends run tranny temp gauges and know tranny fluid temps r with-in specs?
#9
Seasoned Member
Join Date: Aug 2014
Location: Lehigh Valley PA
Posts: 486
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1989
Model: Cherokee
Engine: 4.0 renix
I don't have a tranny temp gauge, it's a renix with no gauges except for MPH. I don't know about my friends'.
If you google and research it a bit, it's known that you can either run it with the factory trans cooler or not, and also in any orientation you want (sideways, upside down, rightside up, etc) since it's not a straight shot from the in/out, it has to go up and through it anyway.
I looked into this quite extensively.
If you google and research it a bit, it's known that you can either run it with the factory trans cooler or not, and also in any orientation you want (sideways, upside down, rightside up, etc) since it's not a straight shot from the in/out, it has to go up and through it anyway.
I looked into this quite extensively.
#10
CF Veteran
Join Date: Nov 2009
Location: The Republic of TEXAS
Posts: 8,172
Likes: 0
Received 14 Likes
on
14 Posts
Year: 1998
Model: Cherokee
Engine: 4.0L HO
A gauge provides solid data to safely prove what works, what doesn't when doing mods. Good data always trumps opinion.......even a lot of opinions.
#11
Member
Join Date: Apr 2014
Location: Ohio
Posts: 247
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1999
Model: Cherokee
Engine: 4.0
In my experience replacing the lines didnt fix the leak. Actually created a new one. My bottom line had the "fix" bypassing the QD but causing a leak. Switched out both lines since I was in there anyway. New line fixed bottom leak but top started leaking. Tried to reposition the new line (with flange opening) about a thousand times and even exchanged the new line for another and tried again. Kept leaking until we hit subzero temps here. Just my two cents. Also, teflon products were warned against due to possible contamination issues
#13
Newbie
Join Date: Nov 2014
Location: Jacksonville FL.
Posts: 5
Likes: 0
Received 0 Likes
on
0 Posts
Year: 1997
Model: Grand Cherokee
Engine: 4.0
Thats good to hear . I opted to replace the lines with a new set from Dormon 624-306. http://shop.advanceautoparts.com/p/d...306/15230048-P
when removing the front line from the trany the brass fitting broke off flush with the trany . Ace hardware had the 3/8 fitting that broke off. an had to use a extractor to remove it . I had to keep grinding down the tip to stop it from bottoming out inside the trany. what i thought would be a simple an fast job turned into a nightmare. Wont do that again
#14
Senior Member
Thread Starter
Join Date: Jan 2015
Location: Anderson, SC
Posts: 641
Likes: 0
Received 1 Like
on
1 Post
Year: 1999
Model: Cherokee
Engine: 4.0
Thats good to hear . I opted to replace the lines with a new set from Dormon 624-306. http://shop.advanceautoparts.com/p/d...306/15230048-P
when removing the front line from the trany the brass fitting broke off flush with the trany . Ace hardware had the 3/8 fitting that broke off. an had to use a extractor to remove it . I had to keep grinding down the tip to stop it from bottoming out inside the trany. what i thought would be a simple an fast job turned into a nightmare. Wont do that again
when removing the front line from the trany the brass fitting broke off flush with the trany . Ace hardware had the 3/8 fitting that broke off. an had to use a extractor to remove it . I had to keep grinding down the tip to stop it from bottoming out inside the trany. what i thought would be a simple an fast job turned into a nightmare. Wont do that again
My next project is ofa o-rings this weekend.
Thread
Thread Starter
Forum
Replies
Last Post
lgrant
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
2
07-05-2022 12:19 AM
xjwolfman
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
8
08-26-2020 12:59 PM
NM-XJ
Stock XJ Cherokee Tech. All XJ Non-modified/stock questions go here
18
10-23-2018 04:21 PM
mtoskippy
Stock Grand Cherokee Tech. All ZJ/WJ/WK Non-modified/stock questions go here!
6
09-07-2015 08:56 AM
Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)