318 Onan P218 - Rebuild or Repower?
Posted September 13, 2011 - 04:00 PM
So my question is: Are there other makes of tractors that have the P218 engine I can look for? Are there other makes of engines that will fit with little or no rework? Or should I just try to rebuild what I have? Thanks, Dave
Posted September 13, 2011 - 04:58 PM
John Deere 318 Outdoor Power Equipment Repower from Small Engine Warehouse
Not cheap kits, but easy to install. The Onan engines used on the 318 have large crank output shafts, which possibly no other Onan on other makes have, so with any Onan off another make is used, a new pto clutch would have to be used as yours would not fit. Only another P218 off a JD 318 would be a simple drop in.
If your bore mic's out good, and your pistons are still within spec, rebuilding your original engine would be the best route. I would replace all bearings, both crank & cam, replace the valve guides as well. Likely you're getting just as much oil consumption through your guides as past the piston rings. Take a good look at the valve faces & mic the stems too. Go through all measurement tolerances before making your decision which way to go. That's the only way to know the rebuild costs & get good results.
Posted September 14, 2011 - 08:51 AM
Posted September 16, 2011 - 08:42 AM
Posted September 16, 2011 - 08:45 AM
Not sure why, but I numbered the rods and pistons (something my dad told me when I was a kid).
I always do that myself!
Posted September 17, 2011 - 07:10 AM
Posted September 19, 2011 - 08:10 AM
Posted September 20, 2011 - 05:23 PM
Posted September 21, 2011 - 09:35 AM
Posted September 22, 2011 - 07:53 AM
Call T.H.E. company. They will sell you a sleeve that takes a 1" shaft to 1-7/16" shaft. They also do a very nice job on Honda kits and have great customer service. Ask for Paul or Jess. (I am not affiliated with this company nor do I get any bennifit)
Dan, I did a google search for T.H.E. company. Just wanted to confirm that your talking about the folks out in Mount Pleasant, Iowa?? thanks
Posted September 22, 2011 - 08:59 AM
What do you think an average "fair" price would be if I were to send my Onan P218 out to be rebuilt? Thanks!
I would have no idea, as I do ALL my own rebuilds. Price for machine shops vary also, but member TD&H just had two crankshafts ground, rods & mains for $45 each crank. Last bore job I had done was $40. Last re-sleeve job I had done was $110. I can rebuild for WAY less $'s than hiring it, or buying a new engine.
Posted September 22, 2011 - 09:33 AM
- truckintyler said thank you
Posted September 22, 2011 - 01:54 PM
How many hours are on your 318?
1230 hrs regeistered on the hour meter. I haven't checked everything out yet, but just my initial view once I tore down, was that one cylinder showed alot of carbon buildup on the intake valve enough for me tell that, that was the cylinder burning the oil.
Posted September 22, 2011 - 02:54 PM