[Vwdiesel] New head installed 91 ECO

[brian gochnauer]

imho...
low oil pressure and now piston clanging. Classic, spun main bearing, very
bad news.
If you do an oil analysis, it would show high metal content of bearing
materials, like tin. lead, copper.
You might even be able to see it if you let it get bad enough, it will
show up when you drain the oil like metal a silver metal flake paint when
you stir it.
Eventually it will break a rod, and likely send it though the side of the
block.
A spun bearing means at least machine shop work on the block and crank, but
most people just do a R&R on engine.

On Sun, Jul 20, 2008 at 8:58 PM, mikitka <mikitka at embarqmail.com> wrote:

> Well, not sure who all know about my oil pressure issue that I have had in
> my 91 ECO now TD jetta. I basically had ZERO pressure once the engine
> warmed
> up. This was taking pressure from the head with a good known mechanical
> pressure gage.  Well I got the new head on, I have one issue and I'm hoping
> it will be an easy fix. Anyway I got it running today with the new head on
> it and I had 40psi at cold start up from the head pressure port and when it
> reached operating temp it was down to 19 psi.  It had never gotten about
> 18psi before when cold and ZERO when warm but now I have 19psi at operating
> temp. So it looks like that head is a bad casting. When I pulled it I had
> the head gasket on correctly so that wasn't the issue, obviously it is
> inside the head. Sure was nice to see that pressure. This is also running
> 15w-40 oil. I plan on changing the oil out tomorrow, just wanted to make
> sure all was well before I did change it out.
>
>
>
> Now the issue I have is I have a really loud pinning/diesel sound. Almost
> like valves hitting piston. I did turn the engine over by hand several
> times
> and didn't feel anything. It was all aligned, TDC with cam plate and IP
> plug
> in gear. I then turned it over several times by hand and then set it back
> to
> TDC and set the timing with the gage in the IP to 1mm maybe a little more
> or
> if you went by my gage it was .040.  I ran that several times to make sure
> it was set after I tightened down the pump mount bolts and it didn't move.
> I'm hoping that the heavy pinging is just way to much timing and not actual
> pistons hitting. Like I said I didn't feel anything when turning it over by
> hand.
>
>
>
> Tomorrow I'm going to go back and recheck all my timing with the cam plate
> and IP plug and TDC since it has ran some, then I'm going to loosen the
> pump
> and move it ever so slightly to see what happens. Just want to make sure
> that pulling the IP away from the head retards the timing correct?  Because
> when I was setting it to advance it on the dial I moved it in toward the
> head.
>
>
>
> Thanks,
>
> Nick
>
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