I pretty much nailed it down to what Kaleb suggests: Bad #1 rod
bearing, collapsed #1 rings. It all supports the symptoms: Hammering
at 1/2 RPM, blue smoke out the tail pipe and oil coming out around #1
prechamber.
On 3/17/07, Loren Faeth [EMAIL PROTECTED] wrote:
Hans, Did you pull the sump
In a message dated 3/17/2007 5:11:59 P.M. US Mountain Standard Time,
[EMAIL PROTECTED] writes:
I pretty much nailed it down to what Kaleb suggests: Bad #1 rod
bearing, collapsed #1 rings. It all supports the symptoms: Hammering
at 1/2 RPM, blue smoke out the tail pipe and oil coming out
The vacuum pump on his car wont pump oil into the intake, only the older
diaphram versions vent to the intake.
[EMAIL PROTECTED] wrote:
In a message dated 3/17/2007 5:11:59 P.M. US Mountain Standard Time,
[EMAIL PROTECTED] writes:
I pretty much nailed it down to what Kaleb suggests: Bad
Thanks for all the input, fellows.
Once I have the motor on the ground, I will investigate and report.
Thanks again,
On 3/15/07, Peter Frederick [EMAIL PROTECTED] wrote:
I would plan on pistons and sleeves -- there is absolutely no chance
that they are good. Crank probably only needs polishing,
Hans, Did you pull the sump pan to verify there is a bad rod?
The prechamber ball is a good suggestion also, but in my experience, in
that case there is variation in the knocking as the ball bounces around and
it sounds more from the head than from the crank area.
At 12:35 AM 3/17/2007, you
I am kicking this around: rebuilding the sickly OM 617 at 175k miles.
Taking that the rod bearing went and nothing broke, I think following
work should give me an engine good for a long time to come.
1. grind the crank for new bearings (0.25mm oversize) all around
2. new rings (and sleeves ?)
3.
1. grind the crank for new bearings (0.25mm oversize) all around
I don't know about the rest of your to do list, but IIRC these cranks are
nitrided and don't go bad unless they are totally wiped out. You are not
dealing with 'merican iron.
Rick Knoble
'85 300 CD
'87 190 DT
What I don't know is where the blue smoke comes from. It is not
blow-by since I had the turbo intake boot from the air cleaner off
when I ran it yesterday.
I forget, was the onset of blue smoke sudden? Blowby works both
ways, in that if gases are leaking out then oil can be leaking
in. I
That blue smoke came with the knocking. Very sudden.
I have the idea that it has something to do with the leak at the
prechambers and that would lead to collapsed rings at #'s 1 2.
But why, at the same token, is it starting easy and idling stady,
barely shaking the engine?
I know, a compression
I dealt before with nitrated cranks (Peugeot) and found that they go
out of round enough to ruin a new bearing in short time. IIRC the
tolerance is +/- 0.0005.
On 3/15/07, Rick Knoble [EMAIL PROTECTED] wrote:
1. grind the crank for new bearings (0.25mm oversize) all around
I don't know about
I would plan on pistons and sleeves -- there is absolutely no chance
that they are good. Crank probably only needs polishing, but if you
have had oil starvation, have it magnifluxed for cracks, they CAN break
(not fun).
If the bearing has spun, the block is toast.
Peter
11 matches
Mail list logo
