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Water pump replacement |
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bigbad69
Supporter of TheAMCForum Joined: Jul/02/2007 Location: Ottawa, Ont. Status: Offline Points: 6686 |
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The correct term is core plug. The holes are part of the casting process and must be plugged to keep water in the block. Most people refer to them as freeze plugs and may help protect against frozen coolant, but I have seen a few cracked blocks with the "freeze" plugs still intact.
I believe there are also drain plugs on either side of the block. These will be threaded Edited by bigbad69 - Aug/07/2012 at 1:58pm |
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69 Javelin SST BBO 390 T10
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brahlf
AMC Nut Joined: Feb/16/2010 Location: Waukesha Status: Offline Points: 361 |
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There are two threaded 1/8 inch pipe plugs in the block, one on each side. Should have 9/16 hex head. If I remember correctly they are located somewhere near the motor mount brackets. They can be tough to remove. Years of corrosion. I have taken them out with a impact wrench, also have striped the heads trying to take out. Much easier if the engine is out. If you get them out you will probably have to poke something in the hole to dislodge all the crap.
Do not remove any 'freeze' plugs if you have never done this before. Again easier if the engine is out. They are easy to remove but difficult to reinstall correctly with the engine in the car. Hope this helps, Bruce |
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Bruce
1969 American wagon 290 1966 American Convert 290 1972 Gremlin X Factory 304 1978 Matador Wagon 360 1989 Jeep Comanche 3 AMC Eagles, not running yet |
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68amxgold
AMC Apprentice Joined: Apr/20/2012 Location: ga Status: Offline Points: 94 |
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Hey Bruce. Thanks. That's pretty clear. Guess I'll crawl under and see if I get lucky. Might better soak it good with PB and borrow the neighbors impact wrench.
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Jska
AMC Fan Joined: Apr/04/2016 Location: 31328 Status: Offline Points: 11 |
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Hi, do you recall if you removed the power steering pump? or Can I remove the pulley and the two bolts that attach the swing arm? and then reattach after install water pump.
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Trader
AMC Addicted Joined: May/15/2018 Location: Ontario Status: Offline Points: 6913 |
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The pipe tread core plugs will likely have crud blocking them. After removal, take a penny nail or stubby screw driver to clean it out.
Best to get a pipe tap and clean the threads before installing new plugs. I use Aviation Form a Gasket as pipe dope here, there are other products but a sealant of some sort is best in this location from my experience.
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ChillyB
AMC Nut Joined: Nov/14/2018 Location: PA Status: Offline Points: 371 |
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Back cylinders of my engine was packed with some kind of black silt. Pressure washed through core plugs before replacement but later pulled heads and was surprised at how much I hadnt got out. Only reason I did it was a leaking steel core plug (welch plug is another term). Recommend brass plugs, but if you maintain coolant steel will last a long time.
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6PakBee
Supporter of TheAMCForum Charter Member Joined: Jul/01/2007 Location: North Dakota Status: Offline Points: 5458 |
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Formally the term "Welch plug" only applies to the concave flat disc style of plug. The alternative is the tapered cup design. I offer some information. Ignore, heed, matters little to me. |
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Roger Gazur
1969 'B' Scheme SC/Rambler 1970 RWB 4-spd Machine 1970 Sonic Silver auto AMX All project cars. Forum Cockroach |
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ChillyB
AMC Nut Joined: Nov/14/2018 Location: PA Status: Offline Points: 371 |
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