Re: TECH:Trying to confirm rod knock

["Curt Voss" <curtv@eudoramail.com>]

In my experience a worn rod bearing always knocks loudest in the first few seconds after you start the car until oil pressure builds up, so it doesn't sound like a rod to me. Maybe a main bearing, or it could be something else entirely. Does it get louder under load? Do you have an oil pressure gauge and if so has the pressure dropped?

---
'86 Scirocco 8V, soon to be sold
'82 Scirocco 1.8 8v - the daily driver
'81 Caddy
'78 Rabbit 1.7L rustbucket in semi-retirement
'86 Celica GTS
'02 PT Cruiser - the wife's boat

On Mon, 22 Oct 2001 22:31:19   chris gonzalez wrote:
>the patient: 88 cabriolet 1.8 8v (all stock).
>the symptoms: start the car and everything sounds fine at idle. slight
>ticking from the hydraulic lifters, but nothing out of the ordinary.
>rev the car, and it still sounds normal. get it and drive the car up
>the block still normal for about 1/2 mile, then a dull knock knock
>knock that varies with engine speed. used a mechanics stethoscope and
>the sound is apparently coming from the vicinity of the oil pan/
>automatic transmission.
>
>I pulled off the oil pan and could not see anything out of the ordinary
>(with my untrained eye, that is). connecting rod bolts are all there,
>and torqued, at least...
>
>Should I go further and pull of the rod bearing caps and inspect the
>crankshaft? I figure if a rod is knocking it's "gonna leave a mark."
>Has anyone used the "ground out the spark wire trick"? 
>
>Or could it be entirely something else? 
>
>TIA,
>chrisg
>'82 8v
>'88 16v
>
>
>
>
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