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The CJ3A Page Forum › Willys CJ-3A Technical Knowledge Base › Tech Talk › Engine coolant drain

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Engine coolant drain (Read 3277 times)

PaulS 3A Guru Offline Still Plays With Jeeps Posts: 271 Location: Edmonton, AB Joined: 04/22/13 Gender:	Engine coolant drain 04/29/13 at 03:08:31	Print Post
	Silly question, I'm sure. But all the manuals (I've got the Willys one, plus Chilton and Haynes, and a reproduction of the CJ3A owners manual found online) say there's a drain thingy on the lower right side of the engine block. I can't see it! I know my engine is from a 2A, but most of those manuals cover both. Clearly, if there was a drain thingy, someone has replaced it with a bolt, but I don't want to remove the wrong one. Anyone have a picture that shows where it is? Thanks, -Paul


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PaulS 3A Guru Offline Still Plays With Jeeps Posts: 271 Location: Edmonton, AB Joined: 04/22/13 Gender:	Re: Engine coolant drain Reply #1 - 04/29/13 at 03:09:40	Print Post
	Hey, I didn't write "thingy". I used the word that all the manuals use, but I can see why forum software doesn't allow it. -Paul


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Ryan_M Flatfender Master Owner Member 2012 2016 Sponsor Member 2015 Sponsor Member Offline Posts: 1695 Location: Glenburn, ME Joined: 12/29/11 Gender:	Re: Engine coolant drain Reply #2 - 04/29/13 at 10:07:38	Print Post
	This thingy?

	plug.jpg ( 256 KB \| 59 Downloads ) Current: '49 CJ3A '51 CJ3A '42 Willys MB-T '47 Bantam T3-C Previous: '46 2A '51 3A '52 3A '52 M38 '54 3B East Coast Willys Association
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garage gnome Flatfender Master 2013 Sponsor Member Offline Rustologist Posts: 1931 Location: Chester Joined: 02/16/12 Gender:	Re: Engine coolant drain Reply #3 - 04/29/13 at 11:50:54	Print Post
	They are also called petcocks. Yes, the word you were using is banned for obvious reasons. Glad you understand. It should be pipe thread (I can't remember if it is 1/8" or 1/4"), so if there is a bolt in there, chances are the threads are messed up.

	Nate in Western MA 1953 3A #3268, The Jalopy, '47 2A Wheelin' rig, '49 3A, #37071, unmolested, bone stock named Ted
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PaulS 3A Guru Offline Still Plays With Jeeps Posts: 271 Location: Edmonton, AB Joined: 04/22/13 Gender:	Re: Engine coolant drain Reply #4 - 04/29/13 at 13:40:18	Print Post
	Ryan_M wrote on 04/29/13 at 10:07:38: This thingy? That's the one. Missing in action on my block. Thanks a lot for the photo--that really helps. And the plot thickens--there's no bolt sticking out there, either. I'll have to scrape the accumulation of grime off to see what really is in that spot. But either something is really weird with this block, or it's plugged flush. Just my luck... -Paul
	« Last Edit: 04/29/13 at 13:40:42 by PaulS »

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garage gnome Flatfender Master 2013 Sponsor Member Offline Rustologist Posts: 1931 Location: Chester Joined: 02/16/12 Gender:	Re: Engine coolant drain Reply #5 - 04/29/13 at 14:12:17	Print Post
	It could have an allen head pipe plug and the socket is full of grime, so it looks like there is nothing there.

	Nate in Western MA 1953 3A #3268, The Jalopy, '47 2A Wheelin' rig, '49 3A, #37071, unmolested, bone stock named Ted
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athawk11 YaBB Administrator Owner Member 2012 2016 Sponsor Member 2015 Sponsor Member Offline 1949 CJ3A Posts: 2771 Location: Arvada, Colorado Joined: 01/26/11 Gender:	Re: Engine coolant drain Reply #6 - 04/29/13 at 14:21:07	Print Post
	There are engine blocks that have the drain position further toward the rear. Take a look at the photo in this 503 thread.... http://g503.com/forums/viewtopic.php?f=11&t=34636 Tim

	2-1949 CJ3A 1-1946 CJ2A
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garage gnome Flatfender Master 2013 Sponsor Member Offline Rustologist Posts: 1931 Location: Chester Joined: 02/16/12 Gender:	Re: Engine coolant drain Reply #7 - 04/29/13 at 14:27:58	Print Post
	Yep, what Tim said. That is where the one is on my '53.
	« Last Edit: 04/29/13 at 14:28:12 by garage gnome »
	Nate in Western MA 1953 3A #3268, The Jalopy, '47 2A Wheelin' rig, '49 3A, #37071, unmolested, bone stock named Ted
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PaulS 3A Guru Offline Still Plays With Jeeps Posts: 271 Location: Edmonton, AB Joined: 04/22/13 Gender:	Re: Engine coolant drain Reply #8 - 04/29/13 at 15:16:13	Print Post
	Clicking on some links, I found this: That one would be under the alternator. And if I correctly understood what I just read, the fact that the S/N is on the water pump boss means that the block may well be the same casting # as this one. I'll check when I get home tonight. Still, there was no petcock under the alternator--I looked. But there may be a bolt there. -Paul


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PaulS 3A Guru Offline Still Plays With Jeeps Posts: 271 Location: Edmonton, AB Joined: 04/22/13 Gender:	Re: Engine coolant drain Reply #9 - 04/30/13 at 04:28:20	Print Post
	Well, I feel dumb. I went back look again, and there was the petcock, right behind the alternator. It's block casting # 638632, same as in the picture I linked to, and the petcock is in the same place as the picture. I don't know why I didn't see it yesterday, other than it was awfully grimy, and I used a better light today...


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