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  1. #1
    New Member
    Join Date
    Dec 2012
    Posts
    2
    Location
    litchfield ct
    Tractor
    1720

    Default fresh rebuilt 1720 wet stacking like crazy!

    Hello folks would definetly love to cure this issue that i am having.I rebuilt the entire engine on my 1720 tractor that I purchased with a spun bearing,I used all new parts from the stealer! I adjusted the valves and unit is running great except for the fact it has oil coming out of exhaust and spitting all over the place! any help would be appreciated. I have heard the thermostat housing had a recall but cant find info on it thank you I hope I posted this in the correct area

  2. #2
    Veteran Member banjodunn's Avatar
    Join Date
    Jun 2008
    Posts
    1,262
    Location
    Oz

    Default Re: fresh rebuilt 1720 wet stacking like crazy!

    Gday have you loaded it up and made her WORK ( i don't mean just driving around the yard )? It may just nedd the rings to bed in or you may have broken a ring during assy. I once rebuilt an old 6 cyl ford diesel with a mix of old and new parts for an old clayson header and it smoked like a trooper running on the stand, as soon as it was in the machine the load of the drive belts was enough to bed the rings in and it cleaned up a treat. That machine stripped about another 1000+ hectares before they sold the farm and never used oil.


    Jon

  3. #3
    New Member
    Join Date
    Dec 2012
    Posts
    2
    Location
    litchfield ct
    Tractor
    1720

    Default Re: fresh rebuilt 1720 wet stacking like crazy!

    Well thanx for the reply banjo. I had the motor bored 40 over with a ton of other newstuff! I have worked slightly. I bought a brand new thermostat for it and was labeled 71 celsius and that convert to 160 fahrenheit ,my tractor is just getting luke warm after running at around 1700 rpm for a half hour.No real smoke to speak of but exhaust is soaking wet and makes a complete mess of my fresh paintjob. Should i try to locate a 190 thermostat? I also tried to vise grip the drain line from block to radiator next I will block radiator with cardboard. Coolant has to be bypassing the thermostat could it be the radiator cap? if i remember correctly the upper hose should get stiff with psi mine is squishy all the tim. Thanx any suggestions would be so helpfull Jeff

  4. #4
    Gold Member
    Join Date
    Dec 2010
    Posts
    371
    Location
    Central Pa
    Tractor
    NH Boomer 1025

    Default Re: fresh rebuilt 1720 wet stacking like crazy!

    If the tractor calls for a 190 t-stat then that's what I'd put in it, replace the rad cap also. Are you sure it's oil coming out the exhaust ports, if it's running cold it could be un-burnt fuel. Did you replace the valve stem seals when you rebuilt the engine and are you getting any vapor out of the crankcase breather tube when it's running.

  5. #5
    Veteran Member jimmysisson's Avatar
    Join Date
    Jul 2005
    Posts
    1,770
    Location
    W.Mass
    Tractor
    1993 NH 2120 (the best), 1974 MF 135 (sold, but solid), 1947 Farmall A (bought, sold, bought back, sold again), 1956 MH50 lbt (sold, in 1980, darn it)

    Default

    Just FYI, I put a shutoff in that bypass line on my 2120 and it really didn't affect the temp much. It does seen unlikely you have that much oil coming out the exhaust, more like fuel.
    Jim
    "Anything worth doing is worth doing slowly" Mae West

  6. #6
    Veteran Member Jerry/MT's Avatar
    Join Date
    Feb 2008
    Posts
    2,078
    Location
    Western Montana
    Tractor
    New Holland TD95D, Ford 4610 & Ferguson TO-30

    Default Re: fresh rebuilt 1720 wet stacking like crazy!

    Go work the snot out of it to get it up to temperature and that should fix the problem. make sure that tyou have the correct thermostat. I don't know the specs on your machine but the thermostat should be rated at 190F-195F.

  7. #7
    Super Member Gary Fowler's Avatar
    Join Date
    Jun 2008
    Posts
    8,193
    Location
    Bismarck Arkansas
    Tractor
    2009 Kubota RTV 900, 2009 Kubota B26 TLB & 2010 model LS P7010

    Default Re: fresh rebuilt 1720 wet stacking like crazy!

    Kick up the RPM to PTO speed what ever that is on your machine and get it off high idle(1700 rpm), load the engine up as heavy as you can without lugging it and work it a few hours. Even with the engine cold it shouldnt be throwing off unburned fuel unless maybe it is running for long period of time at the low rpm. I am with banjodunn on the need to seat the rings. Then work on getting the proper thermostat.
    2010 LS P-7010C 20F/20R gear tractor & FEL, 2009 Kubota B 26 TLB, RTV 900 Kubota,17 foot Lund boat with 70HP motor, 2012-20 ft 12k GVW trailer, 2011- 52" Craftsman ZTR mower, 2013 Ferris Zero Turn, 3 weed whackers, pressure washer, leaf blowers, 7 foot bush hog, 8 foot landscape rake , 8 foot 3 PH disc, 2 row cultivator, 350 amp Miller AC/DC welding machine and all the tools needed to keep them all repaired and running.

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