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Rear main Seals Beware |
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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Posted: Jul/07/2020 at 3:37pm |
FelPro kit and I noticed that the rear main seal has the words "Germany" on it. This means that as a price reduction, they found a cheaper source. Not sure if Victor, MAHLE uses the same seal or not at this point. I just ordered 2 of the Victor ones and they don't have "Germany" on them. Here is a picture of one of the Germany ones that ran for 15 minutes on my starting stand. I did not cut the seal. Chunks came out upon start up. We have an issue here that we need to figure out.
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304-dude
AMC Addicted Joined: Sep/29/2008 Location: Central Illinoi Status: Offline Points: 9081 |
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It looks like you ran it dry. Good thing you do the test run on a stand, I don't like finding that on the car. Done one replacement, under car, and it was not fun.
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71 Javelin SST body
390 69 crank, 70 block & heads NASCAR SB2 rods & pistons 78 Jeep TH400 w/ 2.76 Low 50/50 Ford-AMC Suspension 79 F150 rear & 8.8 axles Ford Racing 3.25 gears & 9" /w Detroit locker |
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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It wasn't ran dry. That is the 90something rear main seal that I have installed. There is a material issue.
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oldamcer
Supporter of TheAMCForum Joined: Aug/09/2007 Location: Ohio Status: Offline Points: 283 |
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Nice find Rick,thanks!!
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40 HudsonCoupe 304/904
33 Essex 315/904 47 Hudson 360/727/TorqueStorm 69 AmboWagon"The Flower Car" 50 StudeGasser360/T-400 74 HornetHatch 304/727 55 Hudson360/904 � |
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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Any sort of date code on it, I'm wondering if it is a new poor quality part or some 50 year old NOS seal that has perished.
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I've finally given up drinking for good...........now I only drink for evil.
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JGRANTAMX
AMC Addicted Joined: Jun/02/2017 Location: Maine Status: Offline Points: 1663 |
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I have four gasket sets I believe two are dated 2016 the other two no date none have rear seals with Germany on them, thanks for the heads up.
J
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kirkwood
Moderator Group Charter Member Joined: Jun/28/2007 Location: Fort Wayne, IN Status: Offline Points: 6564 |
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Wow that’s not good. Curious how you found it? Do you typically tear back down after run in or was there a visible/audible issue?
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AMO Newsletter Editor
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WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5787 |
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I’m guessing he had to clean up a big puddle of oil on the floor.
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I've finally given up drinking for good...........now I only drink for evil.
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SC397
AMC Addicted Joined: Apr/30/2009 Location: Michigan Status: Offline Points: 5428 |
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It is a new seal. All of the older ones still had the AMC part number on them right up until this year. Here are the numbers on the upper seal: dph Germany 1424897-1 Here are the numbers on the lower seal: dph Germany 1424897 Here are the numbers on the older upper seal: TBD (I need to find one) Here are the numbers on the older Lower seal: AM 3180469 SCI 19 Yea, I start up and break every engine in on a starting stand. And yes I could see the oil steadily dripping out of the rear of the engine. It ran for about 15 min before I pulled it off to replace the rear main seal. Imagine if I would have just assembled it and shipped it off to Europe or somewhere without running it.
Edited by SC397 - Jul/08/2020 at 7:07am |
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S Curry
AMC Addicted Joined: Aug/16/2012 Location: Iowa Status: Offline Points: 598 |
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I had this problem with my engine build about 5 years ago. I should've had it tested on a stand. Had to pull it twice to get it right. I blamed the builder for not using permatex noted int the TSM on assembly. He told me it was a bad seal....don't know what ended up in the engine. It's held for 5 years now...
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SC
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