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#1 11-09-2014 11:01:44

floyd
Lurker
Registered: 01-30-2013
Posts: 1

Coolant Drain

I can't find the coolant drain on my '99 4-liter XJ. Its supposed to be on the engine block somewhere.

Is that the best way to drain the coolant? It says in the manual something about putting some sealer on the threads. Does that mean teflon tape?

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11-09-2014 11:01:44

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Re: Coolant Drain

#2 11-09-2014 16:49:30

Mikem
Newbie
Registered: 07-05-2012
Posts: 9

Re: Coolant Drain

Try the radiator petcock. It is on the passenger side. I took my grill out to access it easier.

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#3 11-09-2014 16:58:24

MoparXJ
Lurker
Registered: 03-18-2012
Posts: 2

Re: Coolant Drain

I changed my coolant yesterday and found my 99 cherokees petcock could be reached by removing passenger turn signal.


TODAY IS THE OLDEST I'VE EVER BEEN,
AND THE YONGEST I'LL EVER BE. . . . .

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#4 11-09-2014 17:00:04

jock
Helper
Registered: 10-05-2008
Posts: 30

Re: Coolant Drain

Yes, you've found the petcock. What I would like to find is the SOB of an automobile design engineer who figured this was a great place to put it. Even when you know where the petcock is, if you open it, it will dump anti-freeze all over the backside of the headlight bezel and bumper area making a big mess. In addition, it's just about impossible to catch most of it in any kind of a container.

I recently went through my cooling system (better rad, trans cooler, high flow water pump, 180 deg t-stat and a new fan clutch). In the process, to make changing my coolant easier, I installed a high quality brass ball valve with a quick open handle in lieu of the crappy plastic OEM style unit. Along with some additional brass "plumbing" and a piece of rubber hose I can now *easily* drain my radiator and have it pour straight down into a bucket. I highly recommend the modification. A little safety wire around the handle eliminates any chances of the valve inadvertently opening. Been in place now for almost a year and no problems with leaks.

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11-09-2014 17:00:04

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Re: Coolant Drain

#5 11-09-2014 17:00:39

raul
Newbie
Registered: 10-05-2008
Posts: 11

Re: Coolant Drain

If you lie on your back under the engine, you'll see it on the side of the engine block on the driver's side.  There's also the petcock that you need to loosen.  I needed to take off my grill in order to access it, but when I loosened it, it didn't drain.  Apparently, when you loosen the drain plug on the engine block, the coolant will flow out of everywhere.  the plug requires a square bit- I think 8mm.

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#6 11-09-2014 17:01:39

scottmphoto
Lurker
Registered: 03-25-2014
Posts: 4

Re: Coolant Drain

Idea for changing coolant...   
 
I don't fool around with the petcock.  When I replace my coolant, I get a big container and just undo the hose clamp for the hose that leads from the bottom of the radiator to the water pump AT THE WATER PUMP.  Then, I bend the hose down into the large container.  Undo Radiator cap. Radiator empties in seconds as does a good portion of the block.   DO THIS WITH SYSTEM THOROUGHLY COOL !  Also, makes a mess but it is fast.

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#7 11-09-2014 17:02:16

robert
Helper
Registered: 02-05-2009
Posts: 31

Re: Coolant Drain

Count me in,,, it's quick

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