cold start knock

In article <acc6534a-d9c0-4a08-a48b-4d92482957e7
@i29g2000prf.googlegroups.com>, gst200 RemoveThis @aol.com says...
> Hey ya'll. I got a 98 jetta 2.0. It has a knarly engine knock for
> about 1 to 2 min on cold starts. After that is sounds fine. No knock
> during heavy load (fast take offs or hills), only knocking on the cold
> starts. Where should I be looking to fix this?

That's a gasoline/petrol engine?

First, check that the oil level and weight used are correct according to
the owner's manual for your climate. Too 'heavy' and it won't pump
properly. Too 'light' and it flows too easily. At least one my '95
2.0l ABA gas motor, it likes 15W50 down to around freezing. Below that
and there can be a little startup tapping (5 seconds max). I think any
10W30, 10W40 is ok down to something like -40. (C or F, it's the same
number down there Double check your owner's manual just to be sure
tho'. 20W40 or 20W50 will be too 'heavy' below freezing.

Second. Uh, when'd you last change your oil?

Third. Is the check engine or oil pressure gage/light telling you
anything? Does it work? (don't remember on my '95 if it comes on at
first turn on of the ignition or not - and for a '98 it's possible the
bulb could be out) There's been a 'rash' of oil pump replacements on
the group here lately - or at least it seems so - if 2 or 3 can be a
'rash'

Mark
'95 Jetta GLS
 >> Stay informed about: cold start knock 

May be just a lifter common after 100 k miles 160 k/km no worries mate
"hedgehog" <gst200.DeleteThis@aol.com> wrote in message
news:c7178160-da94-4d2d-a073-fac6dd52523e@e23g2000prf.googlegroups.com...
On Mar 19, 3:28 pm, Mark Randol <mrandolmun....DeleteThis@austin.rr.com> wrote:
> In article <acc6534a-d9c0-4a08-a48b-4d92482957e7
> @i29g2000prf.googlegroups.com>, gst....DeleteThis@aol.com says...
>
> > Hey ya'll. I got a 98 jetta 2.0. It has a knarly engine knock for
> > about 1 to 2 min on cold starts. After that is sounds fine. No knock
> > during heavy load (fast take offs or hills), only knocking on the cold
> > starts. Where should I be looking to fix this?
>
> That's a gasoline/petrol engine?
>
> First, check that the oil level and weight used are correct according to
> the owner's manual for your climate. Too 'heavy' and it won't pump
> properly. Too 'light' and it flows too easily. At least one my '95
> 2.0l ABA gas motor, it likes 15W50 down to around freezing. Below that
> and there can be a little startup tapping (5 seconds max). I think any
> 10W30, 10W40 is ok down to something like -40. (C or F, it's the same
> number down there Double check your owner's manual just to be sure
> tho'. 20W40 or 20W50 will be too 'heavy' below freezing.
>
> Second. Uh, when'd you last change your oil?
>
> Third. Is the check engine or oil pressure gage/light telling you
> anything? Does it work? (don't remember on my '95 if it comes on at
> first turn on of the ignition or not - and for a '98 it's possible the
> bulb could be out) There's been a 'rash' of oil pump replacements on
> the group here lately - or at least it seems so - if 2 or 3 can be a
> 'rash'
>
> Mark
> '95 Jetta GLS

I was thinking oil pump but the knocking goes away after a min.
Wouldn't I have a full time problem if it was that? My oil light and
check engine light both come on at start up and then both go right
out. I'm using full synthetic 5W30 and keep up on changes. Average
temp around here lately has been 40 to 60.
 >> Stay informed about: cold start knock 

"hedgehog" <gst200 DeleteThis @aol.com> wrote in message
news:acc6534a-d9c0-4a08-a48b-4d92482957e7@i29g2000prf.googlegroups.com...
> Hey ya'll. I got a 98 jetta 2.0. It has a knarly engine knock for
> about 1 to 2 min on cold starts. After that is sounds fine. No knock
> during heavy load (fast take offs or hills), only knocking on the cold
> starts. Where should I be looking to fix this?
> Thanks

Same here 1.8L engine, same timeout to silence. Its a noisy lifter in my
case.

--
Dave

My vote in this primary was for the lesser
of many evils...
 >> Stay informed about: cold start knock 

In article <c7178160-da94-4d2d-a073-
fac6dd52523e.TakeThisOut@e23g2000prf.googlegroups.com>, gst200.TakeThisOut@aol.com says...
> I was thinking oil pump but the knocking goes away after a min.
> Wouldn't I have a full time problem if it was that? My oil light and
> check engine light both come on at start up and then both go right
> out. I'm using full synthetic 5W30 and keep up on changes. Average
> temp around here lately has been 40 to 60.

If the pump was marginal and the weight was wrong that could cause it
until it pumps up. 60 seconds seems a bit long tho'. 5-10, maybe...

Me, I'd put in a 15W40 or 20W40 (*W50 would be ok too) or even a
straight 30W and see if it changes. I remember other folks saying using
too light an oil would cause the pressure light to flicker. Also that's
the old 'fix' for knocking and oil burning on an old engine. Go to a
heavier weight oil! <shrug>

Mark
'95 Jetta GLS
 >> Stay informed about: cold start knock 

Mark Randol wrote:
> In article <c7178160-da94-4d2d-a073-
> fac6dd52523e.RemoveThis@e23g2000prf.googlegroups.com>, gst200.RemoveThis@aol.com says...
>
>>I was thinking oil pump but the knocking goes away after a min.
>>Wouldn't I have a full time problem if it was that? My oil light and
>>check engine light both come on at start up and then both go right
>>out. I'm using full synthetic 5W30 and keep up on changes. Average
>>temp around here lately has been 40 to 60.
>
>
> If the pump was marginal and the weight was wrong that could cause it
> until it pumps up. 60 seconds seems a bit long tho'. 5-10, maybe...
>
> Me, I'd put in a 15W40 or 20W40 (*W50 would be ok too) or even a
> straight 30W and see if it changes. I remember other folks saying using
> too light an oil would cause the pressure light to flicker. Also that's
> the old 'fix' for knocking and oil burning on an old engine. Go to a
> heavier weight oil! <shrug>
>
> Mark
> '95 Jetta GLS

One shouldn't be using a xW30 in a WCVW anyway.

nate

--
replace "roosters" with "cox" to reply.
http://members.cox.net/njnagel
 >> Stay informed about: cold start knock 

could be some piston slap or a valve lifter. How many miles on engine? Try
to listen from where on the engine the noise is coming from.

"hedgehog" <gst200 DeleteThis @aol.com> wrote in message
news:acc6534a-d9c0-4a08-a48b-4d92482957e7@i29g2000prf.googlegroups.com...
> Hey ya'll. I got a 98 jetta 2.0. It has a knarly engine knock for
> about 1 to 2 min on cold starts. After that is sounds fine. No knock
> during heavy load (fast take offs or hills), only knocking on the cold
> starts. Where should I be looking to fix this?
> Thanks
 >> Stay informed about: cold start knock