Hi Folks.. I"ve been working on my 580C for some time now to deal with raw fuel smell from exhaust...this winter I suddenly loss power and eventually ended up tearing apart my injector pump after some research here... turned out that I was also a victim of the "flex-ring" disintegration that spread a major pile of fine black particles throughout the inside of pump...I replaced this ring and reassembled pump/reinstalled back in my D-207 engine...for those thinking of redoing their injection pump, it wasn"t as scary as it"s made out to be by some; just mark where things go including timing and take pictures; I highly suspect a pro can rebuild a pump in less than an hour...anyways, the pump ran fine but the stench of raw fuel was powerful...in fact, I noticed oil was blowing out my crankcase ventilation hose onto ground after running it a bit... then I discovered engine oil level was at top of dipstick (that"s why it was blowing out) and very thin/diesel smell...I actually drained about 14 quarts when it should have been 7 quarts... so I know it"s diesel fuel despite mention of power steering fluid which I removed steering pump and replaced shaft seal needlessly...and yes, I tried replacing the injector pump drive shaft seal previously which didn"t seem to help at all... and I read about torque converter and hydraulic pump...not them I"m sure thanks....so what I am thinking is that the pump flex-ring obvious started to break down over time... the fine particles I assume would move into injectors and perhaps this is causing heavy fuel dripping through cylinders into oil pan...and subsequently giving me the strong raw fuel smell from exhaust that has worsened over time... something is forcing a lot of fuel into oil pan over a very short period of time now... thanks for your review and comments...

Jerry

did I mention to make sure the fuel return line is not restricked or plugged, and are you sure you did not roll one of the pumps shaft seals don't mean to harp on this one but it sometimes takes more than one try for me and I have changed a lot of pumps but I would guess the seals are not your problem due to your comment on the exhaust smell, maybe some of the ring particals are in the return line,, let me know how its going if you don't mind cnt tom

Case Nutty 1660: ...I did blow the return line clear with my compressor...and I oiled the shaft seal well and carefully reinstalled pump...the raw fuel smell started a few years ago... heavy black on powering; otherwise, pretty clear but stinky raw...I did check my 8 degrees before TDC timing and it was fine... I guess I will remove pump once again and check the shaft seal...let you guys know... thanks

Jerry,

One thing i forgot to ask before , did you replace the return line connector ( housing pressure regulator) as it would be plugged with the junk from the ring.

george

...No, I didn't replace this return line connector... can it be cleaned or blown clear with compressed air?

thanks George

No cleaning , replace . It has a glass ball

and a spring and there is no way to clean it.

george

George...I removed the return line connector...blew return line by mouth no problem...the connector comes apart at a joint...you can see right through glass ball..blew out inside...no dirt...I can blow through it by mouth without a lot of force...so I assume return line and connector is fine... guess it"s back to remove pump...I found an old post here I did in 2007 regarding oil in pan rising... here"s a copy:

From: "YT Website Response"
To:
Sent: Sunday, December 09, 2007 7:02 PM
Subject: YT Forum Message

"Re: Replacing fuel > injectors" posted on the Ttalk Forum
> ---------------------------------------------------------------------------
Message: hi... I have a 1976 580C which was a money pit when I first bought it used...anyways, I rebuilt engine and replaced injectors... however, just changed oil and found it had 15 litres in it rather than 6 litres or so it should have...it has always smoked heavy esp under load and I suspect fuel going right through to sump... I've pulled/cleaned injectors tips.. my service manual no help... any ideas ... thanks Jerry its a Roosa pump A-148069

George: I have had this crankcase oil level rising issue for awhile and even before I tore down my injector pump recently... guess I"ll check injector pump shaft seals once again...

Thanks

I will remove this connector tomorrow and simply check it over...

Thanks George

Jerry,

As far as I know the only way fuel can get to the pan is thru the drive shaft seals. Is the brass tube rough on the inside or did you replace it ? If you replaced it how did you fasten it in the housing ?

Smell in the stack could be a bad nozzel or late in time if you got the advance plungers in backwards .

Send me an email with a phone# if you want to chat about it. My guess is you wrinkled a seal .

george

I checked tube for seal wear grooving...tube looks/feels fine...the hoe runs fine and lots of power under load...I will remove pump once again as I mentioned to check shaft seal...and let you know how shaft seal looks...

Thank you

Case Nutty 1660 was correct with pump drive shaft seal issue... the initial seal had an area about 1/4" long that got pinched back during pump installation...obviously this allowed fuel to pour into crankcase...have to be very observant to ensure this seal starts into tube properly or what a mess it creates...I also can see and feel seal grooves inside pilot tube...perhaps this bit of wearing is causing fuel into crankcase despite new seals?...can this tube be moved to offset the wear area or do you simply purchase a new pilot tube?...and is removal and installation of new tube tricky?... thanks again for assistance... any recommendation for raw fuel exhaust smell issue?... my service manual says 8 degrees before TDC, however, someone in this forum told me years ago it was 0 degrees... I have the D-207 engine... thanks

Jerry

Jerry,

Sleeve is most likely the problem .

Send me an email with a phone # and I'll

fill you in on the how to . Also I have

parts and have a fuel shop.

george