Hello
Maybe,,,i heard Bruce say a deeper knock,,,is the float level
correct.,,needle and seat?..are there RICH cylinders?
Could be washing the walls at rings and echoing into crankcase.
I have heard this knock before.
Maybe the piston pin bushing is worn,slapping piston around,heard this
before also.
On the 72s i had to lift motor a bit to get pans off to check rod
bearings.
On the 58 i am able to just pull pan and inspect rod bearings easier.
Oil dirty?...20-50 helps the press. a bit...is the gauge correct?,,are
you able to screw a diff. gauge on to check?
Cut open a oil flt. and see wgat you find.
Whats on your magnetic oil pan plug?
Good luck!
Randy H.
-----Original Message-----
From: Infinite Space Systems, Inc. <[EMAIL PROTECTED]>
To: [email protected]
Sent: Sun, 16 Apr 2006 10:05:14 -0700
Subject: Re: Low oil pressure-72 Cutlass
Bruce,
My oil pressure gauge on my Tic Toc Tac is normally at the halfway
mark > when
idling, and slight above that when the throttle is open.
Lately, I've been hearing a slight banging noise coming from the
driver's
side of the engine (350) doesn't seem like a rod knock and is heavier
sounding
than the tap-tap I would expect from the a bad lifter.
The oil pressure gauge is only at the one quarter mark when idling
and > just
BELOW the halfway mark under throttle. I'm also hearing more of a
knock > when
under throttle.
I'm affraid you are losing a rod bearing. You need to make a decision
very quickly as to a course of action. When the rod bearing spins,
extremely high heat will be produced. The steel backing to the bearing
can weld itself to the rod and/or crank. The rod will lock. If you're
lucky, the engine will just stop and lock up. If you're unlucky, the
rod will snap when the engine locks and destroy the block. I've had one
Olds 394 and one Olds 425 spin a rod bearing and simply lock the engine
when slowing down for a stopsign and for a stoplight. Everything was
repairable on the rebuild for the 425. For our '59 Olds Super 88 wagon,
the car and her 394 were junked, the engine was rebuildable but ignored
for other vehicle related reasons, but the rear axle housing was saved
and used under Thunder on her first suspension iteration. However,
another 425 shelled her block out when a rod bearing failed while
cruising at 55 MPH. The rod broke and went through the side of the
block and the oil pan. That cylinder's piston was beat to death and
disintergrated, destroying the combustion chamber in the head. So, be
very careful and act quickly.
Milton Schick
1964 442 Cutlass
[EMAIL PROTECTED]
___________________________________________________
Try the New Netscape Mail Today!
Virtually Spam-Free | More Storage | Import Your Contact List
http://mail.netscape.com
