HughForrest Posted February 10, 2016 Report Share Posted February 10, 2016 I'm replacing the water pump on my '50 Plymouth (218) and was surprised to find that each of the 3 bolts that hold the pump on the block was a different length. I know at least one of them strikes water so length probably does matter. I looked in my manua l and in the parts book and found nothing. What is the proper length(s), and which one(s) need sealant? Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted February 10, 2016 Report Share Posted February 10, 2016 Hugh, Best bet is to use thread sealant on all of them. Quote Link to comment Share on other sites More sharing options...
Young Ed Posted February 11, 2016 Report Share Posted February 11, 2016 I only recall 2 lengths and if you look at the pump you can tell where the short one goes. 1 Quote Link to comment Share on other sites More sharing options...
HughForrest Posted February 11, 2016 Author Report Share Posted February 11, 2016 I only recall 2 lengths and if you look at the pump you can tell where the short one goes. Don is right: I'll seal them all, but since I have 3 different lengths at least one must be wrong. Also did Ma Mopar use washers or lockwashers on them? Might as well do it right... Quote Link to comment Share on other sites More sharing options...
deathbound Posted February 11, 2016 Report Share Posted February 11, 2016 Lock washers on mine, believed to be stock. Quote Link to comment Share on other sites More sharing options...
Don Coatney Posted February 11, 2016 Report Share Posted February 11, 2016 Yes to the lock washers. I also had to use a few flat washers as spacers for my alternator tension bracket. 1 Quote Link to comment Share on other sites More sharing options...
DonaldSmith Posted February 11, 2016 Report Share Posted February 11, 2016 I didn't like the idea of loosening the water pump bolt to adjust the alternator, so I used a stud (or threaded rod) and nut to secure the water pump, with lock washer, and sealant on the threads in the block. Then I loosely threaded a nut on the stud after the alternator arm was on, and drilled through the nut and stud. I ran a cotter pin or just plain wire through the nut and rod, to keep the nut from backing off. No leaks at the water pump, and alternator arm free for removing, replacing and adjusting the alternator. 1 Quote Link to comment Share on other sites More sharing options...
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