Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Sign in to follow this  

engine questions

Recommended Posts

Hey everybody. I took out my engine today too try and figure out why its been leaking oil lately. Its obvious too see where its coming from because of the oil under the bolt. Also when I tipped the engine over a little bit it started to come out from where that bolt is. My first question is, is there a certain tightness that this bolt has to be so it won't leak again?

My next question is about the cylinder head. I took a look at it for the first time and there's some build up on it. How should I go about taking this stuff off? Can I just take a brush to it?

Thanks for any information.

Share this post

Link to post
Share on other sites
Hi, Those sump gaskets were noted for leaking on the 19 and 25 cu in engines. On the 28 cu in engines Brs added another bolt to correct the problem. Then when they moved them up to 14 hp, they had a number of problems for a while with the sump bolts coming loose and having the dowell pins egg out the holes. We short blocked a number of engines for this problem. On your 19 cu in engine, I would take the sump off, clean the gasket surfaces and put a new gasket on. I believe the latest ones have a bead of silicone on them to make them seal better. I would put some locktite threadlocker on the threads and torque them the the max # called out. Do not put any sealer on these new type sump gaskets. As for the piston, get it to TDC and use a "putty knife" or scraper and scrape it clean. Then blow at an angle around the outside of the piston to lift any loose carbon from above the rings. On the head, I would scrape it out with a dull screwdriver and then I would spray it with some carb cleaner and wipe it out. Wal Mart has spray carb cleaner for about 1.40 a can. Works good on carbon and even fouled plugs and it is super cheap. Do not scrape on the gasket surface. You can spray and wipe the top of the piston also. We usually scrape the heads out, spray them with carb cleaner to remove the oil and then bead blast them in a blast cabinet using glass beads. Be sure to screw an old spark plug in to protect the threads while blasting. Then we scrub it with hot soap and water to get the abrasive out of the metal. Next we lap them on a flat plate with a sheet of sandpaper. With each stroke, turn the head 1/4 turn, this keeps everything flat. Lap until the whole gasket surface shows contact. If you bead or sand blast, you can blow all you want and the abrasive will stay on and in the metal. Only hot soap and waater will remove it. The same is true with hone stone residue in cylinders. Not cleaning cyls with hot soap and water will cause extremely rapid wear to rings and cylinders. Al Eden

Share this post

Link to post
Share on other sites
That's exactly the bolt I was speaking of. I don't know of any torque specs for those bolts. If it's not loose, I'd replace the sump (oil pan) gasket and you should be good to go. When I clean carbon like that, I gently scrape off as much as I can with a putty knife. Then spray it with carb cleaner to soften the remainder and scrub it with a brass wire brush. Usually comes as clean as new without any scratching.

Share this post

Link to post
Share on other sites
This topic is now closed to further replies.
Sign in to follow this  

  • Who's Online (See full list)

    • spagester
    • Bird76Mojo
    • Bill725
    • PhanDad
    • Chris727
  • Today's Birthdays

    1. Briggs
      (53 years old)
  • Recent Status Updates

    • Paul M.Murphy

      Paul M.Murphy

      Hello glad I got on this site. I hope to upload a couple of photos of my Simplicity Broadmoor 
      Model 707 Tractor. I have replaced all the belts on it and installed a new ignition switch.
      Have a mower deck which was in poor shape , repaced a couple of bushings and welded the
      deck where there was some holes. The tractor and mower deck came from a friend and the 
      mower deck metal was getting pretty thin. Some new metal was put in it and we also undercoated the underside of the deck. This was done by my friend Greg Toulman.
      I have not put the mower deck on the tractor yet, waiting for Greg to come home and give me a hand. Can you please tell me if there is a manual for the mower deck and where I could get one.
      I would also like to get some moon wheel discs as well.
      I will try and down load some photos of the tractor when my wife shows me how to. 
      I really love driving this tractor and also how well it is made compare today's tractors, especially the flexible rear end and the rollers.
      Tell the next time 
      · 8 replies
    • jbrooks

      jbrooks  »  Talntedmrgreen

      folowing  this from a link at the downloads.  I just rescued an AC 920 with the lambodini diesel. I can' t download  yet .  Where did you find the PDF copy you posted. . I would like to figure out how to adjust the injection pump. 
      I assume it's a bosche, correct
      · 0 replies
  • Adverts