Quickest and Easiest Way To Stop Oil Leak In Rear Seal??

HornetSpecial
HornetSpecial Expert Adviser
edited November -1 in HUDSON
:confused: I have 49 with bad rope seal in rear of motor. Does anyone have a fix without pulling motor?

Thanks, Paul

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  • Unknown
    Unknown
    HornetSpecial wrote:
    :confused: I have 49 with bad rope seal in rear of motor. Does anyone have a fix without pulling motor?

    Thanks, Paul



    I had the same problem with my 1929 Hudson. I took the timing chain cover off and there it was..The mop seal was leaking real bad. I pulled "all" of the mop seal, cleaned it out very well and filled the area up with the high heat silicon sealer. It stopped all the leaking in that area and Geoff Clark was my adviser on this, Good Luck, Ron
  • Unknown
    Unknown
    here's the tool you need;



    http://cgi.ebay.com/ebaymotors/OIL-SEAL-EXTRACTOR-INSTALLER-fr-Upper-Rear-Main-Bearing_W0QQcmdZViewItemQQcategoryZ111117QQitemZ4623169633



    you'll have to get the front end up in the air and drop the oil pan and the rear main cap,and then loosen the other main caps a smidgen to drop the crank a little.

    you have to be SUPER DUPER careful at that point not to dislodge the bearings!!!

    i always soak rope seals overnight in a pan of oil the night before they're installed.

    good luck.
  • Geoff
    Geoff Senior Contributor
    Ron P wrote:
    I had the same problem with my 1929 Hudson. I took the timing chain cover off and there it was..The mop seal was leaking real bad. I pulled "all" of the mop seal, cleaned it out very well and filled the area up with the high heat silicon sealer. It stopped all the leaking in that area and Geoff Clark was my adviser on this, Good Luck, Ron



    Oops, we have a slight mis-interpretaion here. Ron is referring to the vertical and horizontal packing in between the bearing cap and the crankcase, and I believe Paul is referring to the rear main bearing seal, which stops the oil leaking out the back of the bearing. My Hornet had a bad seal here, and when I dropped the cap, discovered that someone had tried to prise the cap down with some sort of hooked instrument, badly damaging the seal surface in the process. I removed all the damaged seal, and fitted a new on in the bottom of the cap. I also drove the top half of the seal around slightly with a wooden peg made for the purpose, until the other end was very slightly protruding, and put a small section up against the recessed end and rammed it in, then refitted the cap, and used the high-temp silicone sealer up the edges. I figured that putting some pressure on the upper half of the seal would tighten it up a bit. This worked pretty well. There is a very small amount still coming out, but I can live with this until I have the time and inclination to take the engine out and rebuild it. If I leave the engine running for 10 minutes there are about 5 drips of oil on the ground. Previoulsy there would be a trail of oil drips every time I came in the drive, and a pool lying under the car. Good luck.

    Geoff.
  • HornetSpecial
    HornetSpecial Expert Adviser
    Thanks to all for the great info on this rear seal !!

    Best Regards, Paul
  • Unknown
    Unknown
    Geoff C., N.Z. wrote:
    Oops, we have a slight mis-interpretaion here. Ron is referring to the vertical and horizontal packing in between the bearing cap and the crankcase, and I believe Paul is referring to the rear main bearing seal, which stops the oil leaking out the back of the bearing. My Hornet had a bad seal here, and when I dropped the cap, discovered that someone had tried to prise the cap down with some sort of hooked instrument, badly damaging the seal surface in the process. I removed all the damaged seal, and fitted a new on in the bottom of the cap. I also drove the top half of the seal around slightly with a wooden peg made for the purpose, until the other end was very slightly protruding, and put a small section up against the recessed end and rammed it in, then refitted the cap, and used the high-temp silicone sealer up the edges. I figured that putting some pressure on the upper half of the seal would tighten it up a bit. This worked pretty well. There is a very small amount still coming out, but I can live with this until I have the time and inclination to take the engine out and rebuild it. If I leave the engine running for 10 minutes there are about 5 drips of oil on the ground. Previoulsy there would be a trail of oil drips every time I came in the drive, and a pool lying under the car. Good luck.

    Geoff.



    Yes Geoff you are correct. I read this and all I could see was the word MOP and I desided to chime in and let all know that the MOP problem can be solved with a little guidence. I will read the posts in more detail next time and not jump to a answer. Thanks, Ron :)
  • [Deleted User]
    [Deleted User]
    Hudson Dave here. Well my two sense worth. My friend cosmo has a 308 in his truck it started leaking bad like a spot about a foot around every time you shut it off . So i put a bottle of Lucus p/s stop leak in the motor and drove it .The more he drove it the better it got. Last time I saw it there was a spot about the size of a dime . not bad for p/s stop leak. Hudson Dave [url]www.FatWhiteWalls.com:p[/url]
  • Geoff
    Geoff Senior Contributor
    Hudson Dave wrote:
    Hudson Dave here. Well my two sense worth. My friend cosmo has a 308 in his truck it started leaking bad like a spot about a foot around every time you shut it off . So i put a bottle of Lucus p/s stop leak in the motor and drove it .The more he drove it the better it got. Last time I saw it there was a spot about the size of a dime . not bad for p/s stop leak. Hudson Dave [url]www.FatWhiteWalls.com:p[/url]



    Dave, this will probably be reasonably effective in a '55 308 engine, or Jet, which have neoprene seals. I don't know how effective it will be with the earlier rope (dog-turd!) seals. However there is certainly nothing to lose by trying it out. In my case it certainly wouldn't have worked, as the seal wasn't worn, but damaged. Regards,

    Geoff.
  • nick s
    nick s Senior Contributor
    Geoff C., N.Z. wrote:
    I don't know how effective it will be with the earlier rope (dog-turd!) seals. However there is certainly nothing to lose by trying it out. Regards,

    Geoff.



    possibly suprisingly well. 6 years ago I was approaching a meet about 200 miles from home, the oil light came on in my 54. immediately pulled over - unfortunately it wasn't a sending unit problem, the oil was way down. put all the oil i had in the trunk in, started it up. oil pouring out the rear like a bad front hydramatic seal. made it to the meet and located a parts store. bought a case of oil and two bottles of oil stop leak(figured about twice as much capacity as the typical modern engine). poured in both the stop leak and oil to a little past full. by the time we made it home the leak had stopped (yes there was a periodic stop to check level though i'm not sure i even had to add any), and hasn't been a problem since.



    i thought for sure i'd be tearing into it, so yes it can work, yes i would definitely try it again, would i be confident, NO



    if you want quick and easy give it a shot.
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