Hi, I'm looking for some informed comment on my problem before I get
stuck into it.
After a lot of research, a lot on this site, I recently bought a 2nd
hand
well used & much modified 2000 Gu 3l with 98k on the clock. The
previous owner had gone through the dreaded ventilated piston
syndrome at about 40k and had a new late model engine and wiring
harness fitted under warranty.
I have put another 12k on it and it has been brilliant. It's
performance compared to the standard '92 4.2d that it replaced amazes
me. Until last night that is.
Last night about 8pm I hooked up the ski boat and headed for the
south coast. I just got onto the highway and started to hear
a 'buzzing' that was associated with throttle position. Power on buzz
power off no buzz. My first thought was turbo so I pulled into a
garage and popped the bonnet but could hear nothing at idle or when
the engine was revved so I took off again. The buzz was there when
accelerating but not when I backed off. Driving at 50k in third buz ,
knock it out of gear, no buzz (thinking, load on transmision buzz no
load no buzz, is it transmission???) I got into fourth and cruising
at 90k no noise and all was
well until it felt as though it had lost
a bit of power so I popped it into neutral at about 90k so I could
listen to the engine and the revs took off with no throttle and I
sent out a smoke screen that would hide a destroyer and the engine
had a rattle like it had thrown a big end. So much for a relaxing ski
weekend!!!!
After a nights sleep my thoughts are.
1. Buzz was high frequency and engine speed dependant so must have
been turbo
2. Buzz only when engine loaded up. Only when accelerating no buss
free revving or cruising. THis I dopnt understand unlass it is to do
with load on the turbo bearings.
3. Turbo failed and the ingested bits holed a piston. Could the revs
taking off with no throttle be engine oil some how getting into the
combustion chambers??
What is your take in the situation?
My dilema now is what to do.
1. Rebuild the 3l (at what cost???)
2. Fit a 4.2td. What will it cost, Gearbox compatability, diff ratios
etc.
3. Sell it as is and start again.
To be fair to the 3l this is probably a turbo failure and nothing to
do with previous 3l problems.
Any advice will be greatly appreciated.
My son has just turned up with the ski boat on the back of his GQ
4.2d (my
old truck with 310k on the clock and still goung strong, why
did I sell it to him) so I will go down the coast and forget about it
for the week end. I dont have internet access there so I will look
forward to some interesting reading on Monday.
ps Sorry for the long post.
PeteB