+1 on being a sender issue. They get old and tired. They are also effected by low voltage, like at idle. I doubt it is the problem, very very rare to be a problem, but there is a simple spring loaded pressure valve forward of the oil pump.. but I doubt that is the problem.
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Re: Help for Detroit 8V71Tis Low oil pressure at idle
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Re: Help for Detroit 8V71Tis Low oil pressure at idle
My port motor always chimed-in briefly at gear shift RPM drop. Last couple of cruises the bell rings almost all the time at idle after a run. I was due for an oil change, and hoped new 40 Wt. might solve it. No so. The mechanicals say I’ve got 7-8 PSI at idle while cruising at 1800 RPM shows +\- 45 PSI. So I’m thinking that 7 PSI sender has had its day. I’m going to a 5 PSI unit and forget about it.
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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Re: Help for Detroit 8V71Tis Low oil pressure at idle
Isn't the standard sender 3 psi?
"The older I get, the faster I was......."
1979 60C "Ohana" hull# 331
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Re: Help for Detroit 8V71Tis Low oil pressure at idle
My book says 7
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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Re: Help for Detroit 8V71Tis Low oil pressure at idle
BTW, anyone have the p/n for a 5 and/or 7 psi switch?
Semper Siesta
Robert Clarkson
ASLAN, 1983 55C #343
Charleston, SC
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