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Hard to get to but I'd suggest the bolts holding the aluminum fan housing to the case. Use the long screwdriver trick to narrow down where the noise is coming from. Put the blunt end to your ear, driver tip to various parts of the engine till you narrow down the noise ;-) Hope this helps. Good luck, John --- phil cain <bearsvw2000@yahoo.com> wrote: > Check to make sure that the timing pully(air turbin) > is not loose. Phil > > --- "Roush, Norman" <norman.roush@hp.com> wrote: > > > I was driving home Friday afternoon and heard a > > noise that sounded like > > flapping loose sheet metal. I did not notice any > > change in engine > > performance. I check all sheet metal and found > > nothing loose. With the > > engine cover off the noise sounds like something > > rattling around in the > > engine case but is not constant. It sounds like a > > crack or bang but not > > terribly loud. I drained the oiled and it looked > > clean. I used a stiff > > wire and a magnet to see if anything was in the > sump > > but found nothing. > > I checked the compression and it was #1 110#, #2 > > 95#, #3 100# and #4 > > 110#. With the oil bath off the noise did seem to > > be louder and coming > > from inside the air intake distributor. Thinking > it > > could be backfiring > > I checked and adjusted the values and timing but > all > > seemed OK. The > > noise is very intermittent at idle so I slowing > > drove around the block > > and found it happens frequently under load. If a > > rod bolt came loose or > > a bearing shattered would pieces fall to the sump? > > > Could it be a short > > arching? The engine is a stock 1600 with FI and > > manual transmission. > > > > For those in the SF South Bay (Sunnyvale, San Jose > > area) can you suggest > > a mechanic in the area? I cannot teardown and > > rebuild the engine myself > > an need help. > > > > Thanks in advance, > > Norman > > '68 Squareback > > > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > List info at http://www.vwtype3.org/list | > > mailto:gregm@vwtype3.org > > > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ > > > > > > > __________________________________________________ > Do You Yahoo!? > Tired of spam? Yahoo! Mail has the best spam > protection around > http://mail.yahoo.com > >