Oil level going up

rollingthunder · Nov 20, 2011

My oil level has been going up since my injector install. I changed the oil right after and checked it 2 days later and it was a quart high. Drained it and refilled and after 150 miles yesterday it is 1\2-1 quart high again. The oil smells different but looks clean so I am guessing it is fuel. My question is how would fuel get into the oil? Wouldn't it be the other way around if I cut an oring (fuel at 70# oil at 3000#)? What should i look for or at? Thanks

Magnum PD · Nov 20, 2011

Good point about the pressure difference, trying to rack my brain to figure that out also.

rollingthunder · Nov 21, 2011

Well I took the chance and drove it to work to day. 60 miles there and a little bit more on the way back. I stopped to fuel up and noticed that the level was slightly higher but not much compared to the last time. I then noticed that my fuel pressure on the Aeromotive regulator was completly flat. Before when I shut the motor off it took quite awhile for the pressure to bleed of--this time was less than a minute-60--0#. So my question is does the HPOP drop pressure instanly when the truck is shut down? and if so could the fuel pressure be bleeding into the HPO when the truck shuts off? I am going to pull the fuel filters to see if I can find any traces of oil, but maybe the 65#'s is enough pressure on the Oring to keep the oil from crossing into the fuel section of the injector. Have no idea but coolant is kinda obvious in oil so that would leave me with just fuel right? and the only place that could come from is the injector hole or a cracked head correct?

swamp_ratt · Nov 21, 2011

fuel in the oil is from o-rings or injector cups. if the problem persists, change the o-rings and cups

on edit; there is always pressure on your hpo system unless you drain it. i found this out the hardway removing an oil rail plug once. now have a dent in my hood

neverkickn · Nov 21, 2011

Does it smoke any?

rollingthunder · Nov 21, 2011

No smoke--starts fine even cold. Idles fine\smooth. No codes stored, passes CC test. IDM failed but put another one in last week and all is good.

How can fuel get into the oil with the extreme pressure differences? And wouldn't the cups just be a coolant issue?

Diezel Dawg · Nov 21, 2011

smell the oil, and if it happened since injector replacement, then like said above, probably an oring.

rollingthunder · Nov 21, 2011

Is it easy to cut an oring? They were brand new--oiled them good, and gently tapped them into place with a rubber mallet. I guess there is no good way to tell which one it is except pull them all? And can anyone explain to me how the fuel could leak to oil with that much pressure difference--just trying to understand, thanks

bad12jr · Nov 21, 2011

Cracked nozzle? Or internal injector issue. Could you have bumped the tip on anything.

swamp_ratt · Nov 21, 2011

:whs: that is a good addition to advice

rollingthunder · Nov 21, 2011

I bought them used with 5,000 miles on them, I was going to send them to full force(they built them) and have them gone over but needed the truck so I put them in. I don't think I bumped them on anything--kinda anal about everything as this was the first time doing injectors. Internal would make more sense to me--intensifier piston ramping up the pressure on the fuel would overcome the HPO--but have no idea what is inside an injector or if thats even possible.

swamp_ratt · Nov 21, 2011

i had 3 injectors hang open on my truck before it blew up, dumped a ton a fuel in the oil. were the injectors shipped?

rollingthunder · Nov 21, 2011

no, hand delivered. Well i guess I will pull them(have a nice long weekend this week) and take a look. If I can't see any problems with the orings I will send them to cass for a going through and maybe some bigger nozzle's!

swamp_ratt · Nov 21, 2011

i would suggest while your going to do that, replace your cups. that way everything is fresh and you should be good to go

Magnum PD · Nov 22, 2011

Let us know if the injectors were the cause.

Tom S · Nov 22, 2011

swamp_ratt said:
fuel in the oil is from o-rings or injector cups. if the problem persists, change the o-rings and cups

on edit; there is always pressure on your hpo system unless you drain it. i found this out the hardway removing an oil rail plug once. now have a dent in my hood

The pressure bleeds off in time.

swamp_ratt · Nov 22, 2011

Tom S said:
The pressure bleeds off in time.

hmm... i think mine sat for a few days when that happened

Wackerjr · Nov 23, 2011

cups cause fuel in the coolant... remember EVERYTHING is higher pressure than the coolant system... cups are not your problem IMO... you probably crushed a copper washer, or didn't get one out of the hole and now the fuel pressure is leaking by.... pull all the injects and see what went wrong.

Mike's Diesel Performance · Nov 23, 2011

:whs:

rollingthunder · Nov 23, 2011

Wackerjr said:
cups cause fuel in the coolant... remember EVERYTHING is higher pressure than the coolant system... cups are not your problem IMO... you probably crushed a copper washer, or didn't get one out of the hole and now the fuel pressure is leaking by.... pull all the injects and see what went wrong.

Crushed a washer--as in over torqueing the hold downs? I made sure all the old washers were out