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Author Topic:   oil pressure
ewokeric
Gearhead

Posts: 174
From: woodbridge, va united states
Registered: Mar 2002

posted 05-18-2002 10:46 PM     Click Here to See the Profile for ewokeric   Click Here to Email ewokeric     Edit/Delete Message   Reply w/Quote
i have a question, when i first start my engine the oil pressure gauge goes almost to half and stays there. But when i warms up and is idleing it goes way down like to the (L) on the gauge, when i hit the gas it goes up. I have heard that this is normal for stock oil pump on ford engines but wanted soem professional advice like the you get here. Remember the car and engine have not been started for 10 years and all i did is replace the spark plugs,carb,timing belt, and water pump. I am also hearing what can best be described as a low tapping of the valves like a sewing machine. Is that normal? I think they 1969 heads on a 72 block oh and it is a 351w. Thanks for your comments

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68 mustang coupe(california special)not real though but looks it(will be nice) 351w/c4
http://www.erics68coupe.mustangsandmore.ws

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V8 Thumper
Gearhead

Posts: 3529
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 05-19-2002 01:35 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
A cold motor will build higher oil pressure. Ever warmed up a cup of syrup? Try pouring it while cold (thick, pours slow) and then try it after warming up ('thinned out' from heat). This is simple physics and is completely normal; liquids are less viscous with heat.

Do you hear the valvetrain noise at running temp, or when cold, or both?

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Boss302
Gearhead

Posts: 841
From: Coleman, Wisconsin
Registered: Jan 2002

posted 05-19-2002 07:52 AM     Click Here to See the Profile for Boss302   Click Here to Email Boss302     Edit/Delete Message   Reply w/Quote
the 5.0 in my '89 mustang does the same thing.(oil pressure dropping at idle) i was thinking of just changing the oil pump but now i guess i don't have too....right?

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V8 Thumper
Gearhead

Posts: 3529
From: Orange, Ca. United States of America
Registered: Dec 2001

posted 05-19-2002 11:14 AM     Click Here to See the Profile for V8 Thumper   Click Here to Email V8 Thumper     Edit/Delete Message   Reply w/Quote
Unless you've got lifters clattering (or any oil starvation symptom), I'd leave it alone

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ewokeric
Gearhead

Posts: 174
From: woodbridge, va united states
Registered: Mar 2002

posted 05-19-2002 09:05 PM     Click Here to See the Profile for ewokeric   Click Here to Email ewokeric     Edit/Delete Message   Reply w/Quote
thanks for the responses. As for the lifter noise if i here it whent he engine is cold or warm. IF i recall i hear it all the time but is a little louder after warmup

------------------
68 mustang coupe(california special)not real though but looks it(will be nice) 351w/c4
http://www.erics68coupe.mustangsandmore.ws

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