From: Neil E. Amrhein (neil@compu-powr.com)
Date: Mon Jan 12 2004 - 12:45:17 PST
Broken cam, broken timing chain, broken/stripped teeth on the timing gear. All possible. But, IMHO, most likely a sheared key in the lower timing gear on the snout of the crank. Not an uncommon problem with 6.2's.
----- Original Message -----
From: "Chris Stansbury" <chris_stansbury@hotmail.com>
To: "Military Vehicles Mailing List" <mil-veh@mil-veh.org>
Sent: Monday, January 12, 2004 3:37 PM
Subject: [MV] quite possibly have a serious problem with my 6.2L.... a long story
> Hey Guys,
> Something really crappy happened this weekend. I needed to go down the road
> to where my deuce is parked and top up the antifreeze cause it's getting
> colder and colder here. So I hopped in my '84 M1009 and made the 25min.
> drive to the deuce. When I went to start my M1009, I noticed that I didn't
> hear the familiar putter of my inline electric fuel pump. Hmmm, I said, and
> started it anyways. The pump had been making more noise recently and would
> sometimes start working after a few seconds which I figured would happen
> this time. I made the drive down and it was totally uneventful,.....until I
> pulled up next to my deuce at which point the 6.2L promptly cut out. I
> listened for the fuel pump and didn't hear it. Crap, I figured the
> injection pump had lost its prime finally and cut out. I tried to restart
> it, but it was a no go. I beat on the inline pump a little and it started
> running again so I tried to bleed out any air at the fuel filter, but
> nothing came out. So, I topped of the coolant in the deuce and drove it
> home, much to the suprise of my wife and neighbors!
>
> The next day, I bought a new pump and headed for the CUCV. My Dad and I
> replaced the pump. I turned the key on and within an instant there was fuel
> coming out of the air bleed. Strange, even though I had dumped fuel all
> over myself chaging the pump, there was still fuel in the lines. Oh well, I
> cracked 6 of the 8 injection lines open and proceded to crank and crank
> until fuel appeared at three of the nuts. By this time the batteries were
> getting low so we jumped it off of the deuce which quickly brought the
> cranking speed back up. Then, we cranked some more, but still no more fuel
> at the nuts. Hmmmm.... Some point during the cranking it sounded like a
> sharp burst of air was being shot back up the intake and it kept doing that
> with every crank. I have never heard anything like that before. Anyways, I
> kept cranking and cranking at intervals allowing the starter to cool down,
> but still no more fuel at any more nuts. I made sure the fuel cut off was
> working, it was clicking so I assume it was. We worked on it till dark and
> still no go. I could smell a little fuel at the tailpipes, but never saw
> any smoke.
>
> This morning I stopped and bought a can of starting fluid. I know, don't
> freak out, I've done it before and know to disconnect the glow plugs and not
> to pour it down the intake so as not to lock up the engine. The old 6.2L
> has always started on ether even if it wasn't getting any fuel to the
> injectors, but try as I may this morning I could not even get the slightest
> burp out of it. It was still making that air burst on every turn and some
> other weird noises. At one point during the morning I noticed a widening
> puddle of oil under the engine. It was coming from the drain hole on the
> scatter plate. It has always leaked a drop here and there, but never that
> much. I didn't have time before work to pull the scatter shield and see
> where the oil is coming from, but I will sometime this week.
>
> Now I am seriously worried that it wasn't just a fuel problem. With the new
> oil leak, plenty of fuel in the filter, and that weird air burping out of
> the intake bad thoughts are dancing in my head. My Dad suggested a busted
> cam shaft. That would explain the sudden death and the air coming out of
> the intake. Have you guys seen a 6.2 bust a cam? What are some other
> thoughts? I am trying to hash this out because I won't have a chance to
> look at it for a few days. Anyone?
>
> Thanks for reading this epic tale.
> Chris
>
>
>
> Chris Stansbury, O.D.
> 1301 Lee Street East
> Charleston, WV 25301
> 304-343-3363
>
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