Agreed that there are multiple issues.
Most likely the noise from the drive belts is the insulator on the water pump
pulley that, in OE configuration, ran 2 different pulleys for 2 belts. The
pulleys were insulated from each other with a piece of cloth that wears over
time allowing the pulleys to wobble slightly and create all kinds of noise.
The other issue could be the crank pulley - either the harmonic balancer or the
pulley set. What often happens is that the harmonic balancer loosens up with
age and it starts to wobble which damages the crank nose.
With regards to the oil pressure buzzer - that buzzer sounds for both high and
low pressure. Unless you're running a gauge, it's a guess as to whether the
issue is high or low pressure. I don't remember if pulling the leads will
disable the buzzer but that's a good start - if I only could remember which
sensor is which...
The IM bearing is a sealed unit - I haven't had one fail but that doesn't mean
it hasn't happened. What colour are the shavings? If they're shiny, chances
are that they're metal but hopefully they're just plastic bits - from what I
recall, the lower front cover on my car had a hole in it from the harmonic
balancer. It wasn't detrimental nor even audible, just annoying.
On Friday, December 25, 2015 2:07 PM, "[email protected]"
<[email protected]> wrote:
#yiv7469847610 p {margin:0;}You can use a mechanic's stethoscope, large
screwdriver, large extension, or a hose to isolate the source of the sounds.
From: "Holland Phillips" <[email protected]>
To: [email protected]
Sent: Friday, December 25, 2015 12:43:31 PM
Subject: Re: [mk2-16v] 1991 gti oil buzzer went off, engine started loping, and
screeching noises in engine bay
I was thinking the same thing. But with the symptoms he's reporting, the
possibilities are numerous. Since the engine starts and runs, I would be
looking at the rotating ancilliaries.
Do any of the pulleys wobble? Since it sounds like someone removed the A/C,
they may have messed up something with the v-belt system, depending on exactly
how they removed the A/C compressor. Like did they leave all the pulleys in
place, except the one on the compressor itself? As I recall, the A/C drive belt
is a wider, heavier duty belt than the rest. Then I wonder if the power
steering pump and water pump are turning freely. If one of those is frozen, or
partially locked up, that could be a problem. As I mentioned before, trying to
trouble shoot this via textual description is nigh on impossible. If any of one
of our more knowledgeable members is located geographically close to this guy,
maybe we could be of more help. ~HollandOn Dec 25, 2015 09:14, "Les Noriel"
<[email protected]> wrote:
One idea I thought might be part of the problem. Check that the timing belt
tensioner is good. When those bearings go bad, it can make a lot of noise
(buzzer?) It can also compromise timing which would make the motor run badly,
especially if the belt jumped a tooth. Just a thought LesOn Dec 25, 2015 8:27
AM, "Holland Phillips" <[email protected]> wrote:
Another thing you could do that may help to identify the source of the problem
is take a magnet, like one of those extendable magnetic retrievers, and see if
it picks up the metallic shavings you mentioned. If they're non magnetic, then
it may indicate that something is rubbing against the head. Just a
suggestion...~HollandOn Dec 24, 2015 23:29, "damac2004"
<[email protected]> wrote:
sorry this car has a 16v motor. i have been driving it for a couple months so
the noise and loping is definately different and made me want to shut the car
off.
no ac hardware installed i think somebody yanked it and did things the wrong
way.
i got a bently manual and assume i will have to break things down to check, i
guess i was just looking for some real world experience.
i just assumed something was getting jammed up in a way to put load on the
timing belt side to make it lope at idle. but that coupled with the oil light
and shavings near the im shaft makes me fear its the engine side. i can't
even move a pulley when tugging by hand right now.
i had a diesel vacuum pump sieze up once and stopped the im shaft dead. you
could hear the belt screeching, oil light went off and you could smell the
belt. that was the craziest thing i have ever seen, was using a rotary type
and the gear shaved grooves into the cover.
after i got it towed home last night i had to start it and move it onto the
driveway. started and ran as normal with no oil pressure light but i didn't
want to warm it up. wasn't loping but all the clattery racket/scratching can
be heard especially after stabbing the throttle and letting off.
On Thursday, December 24, 2015 at 10:35:01 PM UTC-8, stevenarguello wrote:
The 8v distributor runs off of the intermediate shaft along with the oil pump.
If it jumped a tooth or two the spark timing would be off. The 16v dizzy runs
off the cam. Does it have A/C?
On Dec 24, 2015, at 12:22 PM, damac2004 <[email protected]> wrote:
I'm new to these cars. I got one of these a few months ago and planned on
using it as a project to restore for fun. I have been driving it as is because
it worked. I do have to get it smogged and clean up some neglect but it was
getting me around ok with no funky noises.
Yesterday I came off the freeway and all of a sudden the high pressure oil
buzzer constantly started going off. I heard a racket of screeches and clunks
in the engine bay and the engine was loping near idle speed. So too many wierd
things at once to ignore, but I had to get off the road so i probably ran the
car about a minute after before turning it off. just putting my safety first
because of where i was vs. potentially blowing up a motor.
i had to work and came back to cold car. i have good fluids and started it up
for a bit. it ran with just the hint of stumbling although i don't know if
these cars typically do that while warming up. it wasn't loping the same. i
reved it and didn't get the light to come on but noticed the racket sounded
like its on the drive belt system. while engine was running only odd thing i
noticed is shavings i think near the intermediate shaft from the lower plastic
timing belt cover. couldn't quite tell if another pully was actually touching
it.
im i correct to assume that if something in vbelt system dragged all it would
do is slow down the timing belt, but that would still turn the im shaft without
interference?
is it possible a pulley wobbled its way into the im shaft and held it up? i
sure didn't smell smoking timing belt and will have to look closer. it has
power steering, alternator, water pump with 2 vbelts.
or maybe something bad happned inside engine with oil pump or the im bearings
and the pulley side is worn and walking out and hitting?--
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