D7e s/n:48A4101 inflame rebuild

Possible although the extent would be hard to tell because the drain is so aerated anyway

Can you open the oil fill and pour oil in to top up with the engine running? Does the blow by have any "huffing" quality to it?

If the first gets you a bath and the second is a yes, you are probably are on a short final to an overhaul......or we were with our high hp 48a. It got suddenly much worse and we took off the dozer and drove it in the shop while we still could. Got most everything from REGAL. Biggest hurdle was getting the rear section of the oil pan out over the hard bar.......Had to unbolt the mounts on 4 corners of the engine, disconnect some oil cooler hoses and remove fan shroud, blade etc and then lifted the engine using a hoist rigged to a 6" post laying across the sweeps. Placed a bottle Jack under torque converter housing underneath to lift the back. If you lift more in front than back, the whole assembly will hinge up on the driveshaft in the back without disturbing oil pipes etc. There's probably something else to take loose that I've forgotten. Didn't take a lot, but it had to be lifted to get that rear section of the oil pan out of the way.

Thanks for the quick reply.

Rome K/G - are you thinking the valve guides are worn?

CC Jersay - Adding oil to the oil filler with the engine running spits oil back at you. The blowby has a noticable pulse with a hand over it but with 15psi boost it looks more like a chimney plume. I installed a water gage on the blowby tube with a .221 bleed hole and read 60 inches of water which about 2.5 psi. It almost blew the dip stick out,lots of oil was blown out.(also 15 psi boost) I don't notice blue smoke from the exhaust or excessive oil burning. But I can see the blowby with the dust in front of the Cat when the wind is right and I'm pulling two rippers about 2.5 feet deep in first gear with about 10 inches of boost. The fan on the power shift blows pushing the blowby thru the radiator.

Link to the thread I started at the time we did the overhaul
http://www.acmoc.org/bb/showthread.php?17574-In-frame-on-D7-48A/page3&highlight=48a+overhaul

Just curious is the belly pan full of muck? And is your blow by tube open? What is oil consumption on the machine

Cdcompton-Belly pan was cleaned a few years back but could use cleaning again I'm sure. The blowby tube appears to be unplugged and it seems to burn little oil neither is there any blue smoke.

Today we ran turbo oil return into a bucket. It did not change the blowby so the turbo is not the problem. The next step is to move the cat under cover, set it up on railroad ties and do an in frame rebuild.

Thanks for the help and concern.

One more comment.

The D7e with a D339t engine is converted to electric start with an ether system - no complaints - starts right up.

I plan to replace the pre-combustion chambers with units that house glow plugs. I'll need a controller, solenoids and sensors. Has anyone done that and do they have a schematic with parts list. CTP has the chambers and glow plugs.