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Reged: 02/15/09
Posts: 246
Loc: Washington State
DIY: VG30 Timing Cover Seal
      #615476 - 07/17/14 10:08 PM Attachment (277 downloads)

Figured I would post a "Lesson Learned" regarding this.

Recently, I purchased a 92 Pathfinder which leaked from every orifice. I have most of the leaks taken care of now. The Booger of them all was the timing cover seal.

First I had to remove all of the parts on the front of the engine, including the radiator as the picture illustrates. To start, it sounded like I had a box of rocks under the hood, which turned out to simply be the idler pulley bearing, which is a Breeze to replace.

I checked all of the moving parts that were run by a pulley while I was in there by rotating them and checking for noise. All were good, including the timing belt tensioner.

I removed the timing belt. I don't believe it had been on there very long, but because I had it apart and I didn't know the age of the belt, I replaced it.

The Crankshaft pulley was a pain to remove and I don't believe it had been off since the truck was built in 92 because the seal physically fell apart after I finally got to it. Sooo... That being said, the Haynes manual states to use 2 screw drivers to pry the crankshaft pulley off (There is probably a "Special Tool" for this specific task. I might want one in my future). I ultimately had to use 2 wood chisels and hammer them in behind the pulley to to get it off of the crankshaft. Once I got it about 1/2" out from the oil pump, I was able to us a 2 jaw gear puller to properly remove it. Once I had it off, I observed that the large washer on the engine side, that helps hold the belt on the pully was Totally Mangled to the point that I was not about to re-use it. The pulley, upon inspection, was deformed on a couple of the teeth and I opted to replace the pulley and washer. I found that the pulley is available at my local auto parts store, but the washer was not found, so I went with the Nissan OEM Parts from a Not-so-local dealer.

Now to the seal. The seal was a breeze to remove and install once I got the pulley off of the crankshaft. I used a screwdriver to pry the seal out by putting it at in the sealing area and prying it out. Considering the age, it still came out easily. Once I got it out, I inspected it. The sealing area appeared to be fine, but when I pushed on the seal, I noticed small fractures in the rubber throughout the seal. Age was the culprit. 22 years and a lot of heat and 287Kmiles... sure it's bad and it's gonna leak.

All reassembled with a new seal and all new belts. The engine has a familiar whine with a new timing cover seal that I have experienced in the KA24E engine. I'm NOT sure why a new seal would create a high pitched whine after it was installed and running, but that has been my experience with this and that engine.

All in all, short of waiting on parts, it took me about 8 hours to complete. If you're inclined to do it, and you have the time, I recommend replacing all of the belts and getting a new crankshaft pulley and washers from Nissan.

The Water Pump is a good option to replace while you're in there. Mine showed no signs of weeping, so I left it alone. Hope that doesn't bite me in the butt in the future

Soooo.... Those of you who have experienced the cost of replacing the timing belt, there is a reason. It takes a LONG time to get this job done right and I believe I spent about $150 in parts between the Pulley, washer Timing Belt, belts and idler pulley bearing. Expect more if you need a water pump. The labor is what will kill ya.

Have Fun and hope you enjoy my lessons learned.

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