[s-cars] Borescope'ing the oil pick-up

[brian hoeft]

Im a little aggravated at facing reality, but thanks none the less.

Maybe I should start a new thread, but is there a particular bearing I
should start looking for? I dont have measurements yet obviously, but would
make sure I can get a particular manufacturers.






On Thu, Sep 16, 2010 at 4:01 PM, Tim Dahm <tim.dahm at gmail.com> wrote:

> What Dave said..  Experienced it first hand in a SHO (Taurus rustbucket).
> Rod knock most apparent when engine is at that load/no load transition.
> Louder when oil is hot/thin.
> Stop running engine now.  If you don't want to pull anything apart to
> diagnose, an oil analysis will tell you the story.  In my case a dip stick
> inspection with a magnifying loupe showed plenty of metal in the oil.   I
> was able to slip new rod bearings in with the engine/crank in the car.  The
> new bearings just about doubled hot oil pressure at idle.  Lasted more than
> long enough to get rid of that car.
>
> Tim
> 93/94/94 S4s
> 91 cq
>
> On Thu, Sep 16, 2010 at 2:19 PM, <djdawson2 at aol.com> wrote:
>
>>
>>  You gotta do what you gotta do.... but if it were me, I wouldn't run that
>> car another second if you suspect a slight rod knock.  There is an outside
>> chance that a bearing is starting to go, and that the crank surface is still
>> good, and the big end of the rod is not out of round.
>>
>> If the stars align and the above is true, you could change your rod
>> bearings, re-check you clearances, and be down the road for $150 and some
>> elbow grease.
>>
>> If you run it further, you may be pulling your engine for a rebuild.
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: brian hoeft <qweblog at gmail.com>
>> To: djdawson2 at aol.com
>> Cc: fastscirocco_2000 at yahoo.com; s-car-list at audifans.com
>>  Sent: Thu, Sep 16, 2010 1:05 pm
>> Subject: Re: [s-cars] Borescope'ing the oil pick-up
>>
>>
>> I agree. What I figured is that things would look good in there with the
>> scope, meaning clean. Soo, I would then know I had to schedule down time in
>> my garage to get it sorted.
>>
>> Visiting someone I talk with when I get the chance, while I drain my oil
>> (even into a clean jug, so i can pour it back in) and dig on his fancy
>> tools, sounded better to me than dropping the pan and having a tied up
>> garage for a week, being I could delay for a week and beter schedule the
>> time.
>>
>> -Brian
>>
>>
>>
>>
>>
>> On Thu, Sep 16, 2010 at 2:50 PM,  <djdawson2 at aol.com> wrote:
>>
>> OK....
>>
>> Now I really don't care about your control arm bushings, or any other
>> front end hardware.  You need to pull your pan, and you need to measure your
>> con rod clearances.  If it is in fact rod noise, you may still have a chance
>> of being able to sort this out with the engine still in the car.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: brian hoeft <qweblog at gmail.com>
>> To: djdawson2 at aol.com
>> Cc: fastscirocco_2000 at yahoo.com; s-car-list at audifans.com
>>
>>
>>
>> Sent: Thu, Sep 16, 2010 12:40 pm
>> Subject: Re: [s-cars] Borescope'ing the oil pick-up
>>
>>
>> //Siiiigh,
>>
>> Theres a noticable, what sounds to me like a rod knock, slightly below and
>> into 3k RPM..
>>
>> It doesnt happen at all when cold cold and oil pressure is steady high. It
>> doesnt happen under boost (at least not noticably, yet)(did I say yet..oops)
>> or deceleration. Once warmed and light on the throttle it is quite apparent
>> to me, but I did have to point it out to my friend.
>>
>> kinda wanna puke, kinda staying optimistic, but im pretty confident Lucas
>> and Amsoil are not the cure..
>>
>> -Brian
>>
>>
>>
>>
>> On Thu, Sep 16, 2010 at 1:00 PM,  <djdawson2 at aol.com> wrote:
>>
>>  No doubt your experience may have been different, but I got mine out just
>> pulling the front bolts.
>>
>> Back to the original issue... what makes you think your pickup might have
>> issues?
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: brian hoeft <qweblog at gmail.com>
>> To: djdawson2 at aol.com
>> Cc: fastscirocco_2000 at yahoo.com; s-car-list at audifans.com
>>
>>
>>
>> Sent: Thu, Sep 16, 2010 10:49 am
>> Subject: Re: [s-cars] Borescope'ing the oil pick-up
>>
>>
>> Not saying remove the control arms, but break the bolts free & drop down
>> along with the 2 front and 2 rear sub-frame bolts.
>>
>> I thought the CA bolts went through the sub, into the body. I dont
>> remember getting enough play out of just dropping the front like you
>> suggest. Or maybe I was uncomfortable with the stress I was putting what
>> remained attached.
>>
>> Whatever the case, I do remember trying to be minimal about removing the
>> oil pan and it turning into more than just two front sub bolts to get it
>> out.
>>
>> -Brian
>>
>>
>>
>>
>>
>> On Thu, Sep 16, 2010 at 12:27 AM,  <djdawson2 at aol.com> wrote:
>>
>>  I never said anything about removing your control arms...
>>
>> Seriously, you can get the oil pan out by just dropping the front of the
>> subframe... no need to touch the control arm points.  BTDT...
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: brian hoeft <qweblog at gmail.com>
>>
>>
>>
>> To: djdawson2 at aol.com
>> Cc: fastscirocco_2000 at yahoo.com; s-car-list at audifans.com
>> Sent: Wed, Sep 15, 2010 8:41 pm
>> Subject: Re: [s-cars] Borescope'ing the oil pick-up
>>
>>
>> I know, but I just replaced the control arms and im a hardware freak.
>> "Always replace" may not mean always, as I remember you speaking to before,
>> but my policy is to replace them every other time and they've all been
>> re-torqued once..
>>
>> -Brian
>>
>>
>>
>>
>> On Wed, Sep 15, 2010 at 10:32 PM,  <djdawson2 at aol.com> wrote:
>>
>>  If you've got that sort of concern, I'd just drop the oil pan... it isn't
>> that rough.
>>
>>
>>
>>
>>
>>
>>
>>
>>
>>
>> -----Original Message-----
>> From: chris chambers <fastscirocco_2000 at yahoo.com>
>> To: brian hoeft <qweblog at gmail.com>; liSt <s-car-list at audifans.com>
>> Sent: Wed, Sep 15, 2010 8:07 pm
>> Subject: Re: [s-cars] Borescope'ing the oil pick-up
>>
>>
>> Brian,
>>
>> 17-3 of the AAN engine manual shows the pick up in illustration 17-303,
>> looks to
>>
>> be in the front to me.
>> Here is a link where you can download the manual in pdf format.
>>
>> http://s2-audi.co.uk/workshop/aan/aan.pdf
>>
>> HTH
>> Chris
>>
>>
>>
>> ________________________________
>> From: brian hoeft <qweblog at gmail.com>
>> To: liSt <s-car-list at audifans.com>
>> Sent: Wed, September 15, 2010 9:58:13 PM
>> Subject: [s-cars] Borescope'ing the oil pick-up
>>
>> Hi list,
>>
>> I am concerned that I may have a contaminated engine oil pick-up screen.
>>
>> Wondering if anyone has had any success using a borescope in the oil pan.
>>
>> I forget, but ithought the AAN pick-up is in the front of the pan, but
>> forget if the baffles, however minimal, or dimensions make using a
>> borescope
>> for this task even possible, going in through the drain plug hole.
>>
>> A colleague of mine has a snap-on borescope with fancy lighting effects,
>> but
>> if it cant even contort into place, whats the point.
>>
>> Just typing to know if theres any BTDT for this scenario.
>>
>> thanks, Brian
>>
>>
>>
>>
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>


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