Author Topic: Fuel in Oil  (Read 2646 times)

Offline eagle19952

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Re: Fuel in Oil
« Reply #15 on: December 06, 2017, 03:14:31 PM »
2 psi is a lot more than most think...i would definitely use a secondary regulator...
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline chessie4905

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Re: Fuel in Oil
« Reply #16 on: December 07, 2017, 04:29:14 AM »
Harbor Freight has small pressure regulators that are low in cost, work nice.

https://www.harborfreight.com/air-tools/air-tool-accessories/14-in-air-line-filter-regulator-with-gauge-68228.html
« Last Edit: December 07, 2017, 04:35:40 AM by chessie4905 »
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline bevans6

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Re: Fuel in Oil
« Reply #17 on: December 07, 2017, 05:30:33 AM »
If I was to do that, and I think it could be a great idea, I would plug the return line (out the back of the passenger side head on my MCI) and put air directly into the head, bypassing the fuel pump.  Probably do one head at a time.  You could use a coolant system leakdown gauge, maybe. 
1980 MCI MC-5C, 8V-71T from a M-110 self propelled howitzer
Allison MT-647
Tatamagouche, Nova Scotia

Offline Fred Mc

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Re: Fuel in Oil
« Reply #18 on: December 07, 2017, 10:08:26 AM »
On my bus (gmpd4106) I have disconnected the line that goes from the secondary filter to the head to apply  air pressure. This is after fuel pump. I also will cap off the return line to tank so it only applies air thru both heads. I have an air regulator from a spray gun that goes down to only a few pounds air pressure as well.
And according to the post I read, if you use compressesd air you should be able to hear it leaking. I also suspect one might have to use soapy water to find the leak(s) -and obvoiusly trying to prevent the soapy water running down into the oilpan.

Regards
Fred
« Last Edit: December 07, 2017, 04:24:40 PM by Fred Mc »

Offline chessie4905

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Re: Fuel in Oil
« Reply #19 on: December 07, 2017, 05:11:06 PM »
Don't use soapy water. Put diesel fuel in spray bottle and spray/ flood suspected spots. Air bubbles will show.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline Fred Mc

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Re: Fuel in Oil
« Reply #20 on: December 07, 2017, 08:35:45 PM »
Good idea.
Thanks.