Thread: 67 giulia super engine rebiuld Q's
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Old 03-24-2005, 07:18 PM
Bill S Bill S is offline
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Location: Hagerstown, MD
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Quote:
Originally Posted by Alfonse22
OK --
When I first start it up, the oil pressure is fine, sits right at 55 psi. But, as it warms up, the pressure decreases. When fully warmed up, I have to get it to 3000 rpm and above, for it to barely get to 35 psi, if that far. And the guage goes to 0 (!!). It pulls ok to redline (I don't do that often), and does not overheat. But before I put it away, I noticed a slight rhythmic knock that I know is not the timing chain.
Sounds like you may want to invest in a mechanical oil press. guage to further test it. The senders that Alfa uses quite often read low and the oil pressure at idle is low anyway but the knocking is certainly a concern. Next time you fire it up you may want to try disconnecting the spark plug wires one at a time. If the knock goes away on one of them you probably have a bad rod bearing (sometimes the knock goes away when the pressure of combustion is removed from that cylinder).
Bill Sinclair
67 Duetto
69 Berlina
73 Berlina (for sale)
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