In fixing my DPS valve in the AC system I had to partially drain the coolant because I had to disconnect the transmission cooler brick. Since my car was put into service in Sep. 2013 is now been 10 years. I decided to change the coolant and drain the rest of the coolant. Well this turned into a bit of a problem until once again this list came to the rescue!

I found a very cheap Dorman petcock that is the EXACT replacement! On my 2014 XJ Jaguar does not even list a radiator petcock. You "might" find reference to JLM20622 which is the correct part number for many, many Jaguars. But check the price if you can find it!

The Dorman #61138 is around $6 and available everywhere. I recommend after dealing with numerous Jaguars to just replace it. I also found that almost all of the plugs will be tight and then seize in place after about 1 complete turn loosening it. Not a problem just carefully spray it with WD-40 and try to work the screw back and forth 1/4 turn to work the WD-40 into the rubber/plastic. This will usually tear up the plastic screw head and I use pliers to pull it out all the way. I find I get a much stronger coolant flow out the bottom of the radiator with the plug completely removed.

Also use the largest flat blade screwdriver you have and "try" to not shear the plastic plug off! It's pretty tough but you must use the largest tool possible to fill screw slot with no movement.

Here is my stock plug next to the Dorman replacement.





Can you tell which one is factory and which one is the Dorman? I can't and it all measures exactly the same.

Here is a comparison of the screw head. Now it's easy to see the damage on the factory screw head on the left.





So a super cheap and easy to get replacement part!
This exact same part has been used in millions of Fords since about 1995. The thread size is M14 X 1.50.

This will also be the maiden flight for my new vacuum radiator filler. Looking forward to see how well it works too.
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The Dorman #61138 is a great find - thanks. See me earlier post I had real problems removing but as clubairth1 says just cycle it back and forth and it will come out. I had to fabricate a tool to not chew up the plastic.

 

hafren you were my inspiration as I did read your thread and stole the WD-40 AND working the screw back and forth suggestions from you! But only after getting a single turn and then it all appeared to lock up and was seized pretty solid. I stopped before I broke something and started searching on the forum. Up popped your thread and suggestions. Got it moving in about 30 seconds with the lube and the large flat blade screw driver. Not as nice as your custom tool though.
So thank you again!

But it just seemed like this should be replaced so I took some time tracking it down. Like a lot of Jaguar parts they do interchange IF you can find enough information!
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