John deere 2630

Scott JD2630 · New User Joined: 26 Jun 2009 Posts: 3 Report to Moderator

I have recently rebuild my JD2630 Ran fine through the break in period but first time cutting hay it started to overheat. found stuck t-stat replace started it and it had blow by and also started pressurizing the radiator. Took all apart found streaking on number 2 cylinder changed head gasket and shaved the head. Put it back together thought we had it whipped but it is doing the same thing again. Blow by and pressurizing the radiator. I know it is combustion gasses but from where?? Could a brand new liner be cracked?? Not Even 2 hours on the tractor. Please help Hay down Barrowing other peoples tractor ( not a good thing)

Szrachnor · Regular Joined: 21 Jun 2009 Posts: 60 Report to Moderator

When you had your head off and planed, did you check it for cracks? It could have cracked when the tractor overheated.

-Leon

Scott JD2630 · New User Joined: 26 Jun 2009 Posts: 3 Report to Moderator

Yea I had it planed and magnafluxed and also valve guides checked and valves seated

Tx Jim · Posted: Sat Jun 27, 2009 3:45 am Post subject: Re: John deere 2630

Scott JD2630
Maybe engine oil cooler is leaking coolant. Part # AR65812

Tx Jim · Posted: Sat Jun 27, 2009 3:48 am Post subject: Re: John deere 2630

My mistake as cooler wouldn't pressurize radiator.

Scott JD2630 · New User Joined: 26 Jun 2009 Posts: 3 Report to Moderator

Little disgusted when torn the head off today we found that one liner was about 6-8 thousandth lower then the other 3 liners not sure what to do next be cause on initial tear down there was no shems on any liners. There is always a catch I don't want to point fingers yet but when we found that liner today lower we also found that it has a different number on it. All liners have the same part numbers stamp on them but after that number there is another number on 3 liners it says 2888A but on the one that is low the number is 2878A could that be the depth on the skirt? if anybody knows please let me know