Oil Pressure

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Jun 11, 2006 | 10:05 AM

kenz28

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Oil Pressure

Hey all,

It has been a while, just looking for 1st thoughts and opinions.

Engine: Free - older model (1968) 302.

At start up with cool oil - oil pressure approx 25 pounds at idle.

As engine warms up oil pressure fades down to 0.

Thinking oil pump is going bad.

Maybe a temp quick fix 15W40 or 20w50/thicker oil (running 10W30 from Oriellys at this time). This would be for just a couple of weeks. Or until a good rainy week (Motorcycle riding weather here in Georgia leaves me with little truck time).

Alson wondering if a stock cam from a 351W and lifters from the same engine are interchangealbe with the 302.

Thanks in adavance

KenZ28

Last edited by kenz28; Jun 11, 2006 at 10:17 AM. Reason: adding questions

Jun 12, 2006 | 06:57 PM

cujo8

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Joined: Mar 2006

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From: Williamson, NY

I think your bearings may be shot rather than the oil pump, but could be a little of both, since we are talking about a 38 year old motor.

Jun 13, 2006 | 07:35 PM

hotrodford87

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Joined: Apr 2004

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From: Southeast GA

The cam and lifters will interchange but you have to use the 351W firing order (18436572). If it ain't knocking run 'er till the wheels fall off...or the rods come out...whichever comes first.

Jun 14, 2006 | 10:09 AM

hunter1897

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From: Da UP, eh!

I thought the 351 and even 302HO firing order was 13726548.

Jun 14, 2006 | 03:19 PM

hotrodford87

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From: Southeast GA

Yeah, you're right...been awhile since I thought about it and I confused it with the bowtie brigade.

Thanks for the help
Randy

Jun 15, 2006 | 12:23 PM

1pump

Tuned

Joined: Feb 2003

Posts: 355

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From: Oregon

If your oil pressure is fading down to zero, new oil ain't gonna help.
How are you checking oil pressure? If you're using the stock electric gauge the sending unit might be bad.

Jun 15, 2006 | 07:43 PM

kenz28

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Joined: Dec 2005

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The oil pressure is checked by a mechanical guage in fact, it is the second new one because I did not trust the old electrical one and I had two still in the pack. Probably going to be a combination of both the oil pumd and the bearings.

Cash is short for the next couple of weeks.

I found another oil pump in my stash of parts - I know it is for the 302 - There is a way to check thes pumps with a feeler gauge - anyone remember/know how to do this?

Thanks for all the input.

KenZ28