Ford 9600 blow by. Does it need overhauled?

BMAG · Jul 10, 2015

Hey guys I have a Ford 9600 with 6200 hours on it. Not really to sure about the history of the tractor because I have only owned it for two years. I pull it hard with a chisel plow, and this year I noticed oil underneath the blow by tube. It must have leaked out just while sitting for the last two months. There is also a lot of white smoke coming out of the tube. When I do run it its going through a couple quarts of oil a day. It has more then enough power though and is not showing any lack in that area. What do you guys think?

Bern · Jul 10, 2015

I'd be a little concerned about the oil consumption myself - 2 quarts a day is a lot. My next step would be a compression test. Look for about 300-350 PSI minimum, and good consistency between cylinders.

BMAG · Jul 10, 2015

So would the compression test then determine if it may need a overhaul or may be a different problem?

Bern · Jul 10, 2015

If blowby is indeed excessive, a compression test would be a very good tool to help isolate the cause. If all of the cylinders are just plumb worn out, all of the compression readings will be even and low. If there is a cracked piston let's say, one cylinder will be low. Having said that, doing a compression test on a 9600 is not going to be very fun. The hood is kinda in the way.

You could do a very crude compression/blowby check by holding your hand very close to the breather tube outlet while it's running. If you feel any pulsing whatsoever, that's a bad sign, indicating at least one very low cylinder. If the blowby stream appears even, it's tough to assess the condition of the engine via quantity of blowby without a special tool. "Normal" blowby can look excessive under the right angle of sunlight.

BMAG · Jul 14, 2015

Hey Bern I checked by sticking my hand under the breather tube and it was pulsating pretty fast, and definitively. Looks like I should take it to the shop. Another thing I noticed when shutting the tractor down, you dont hear the engine stop turning and you usually here a back lash right after the last fire. My two 8000's do it. And this 9600 used to do it before I noticed all this blow by. Now when I shut it down there is no noise at all after pulling the kill switch.

RodinNS · Jul 15, 2015

There is an off chance you could find it has a bad head gasket but given what you describe that is doubtful. Most likely in my mind would be broken rings... As Bern suggested, a compression test is the next order of business unless you just want to go digging into it.

Rod

Ford 9600 blow by. Does it need overhauled?

BMAG

Member

Bern

Well-known Member

BMAG

Member

Bern

Well-known Member

BMAG

Member

RodinNS

Well-known Member

Similar threads