Need info on 251 engine

[Bob Carriere]

Hi Alex

I have found at a farm auction a hand driven device...... almost like a small hand cranked drill...... it holds the rubber cup and when you crank the handle the rubber cup turns about two revs one way lifts automatically ...goes down and turns two revs the other way just like a wooden handled tool..... real neat and twice has fast.

Its called progress......

Try going to local machine shops that sends out most of there work to either Montreal or Toronto and ask for a 3 angled valve job..... watch the look on the kid at the counter!!!!

Boob

[Dave Page]

Hi, if your cold and hot oil pressure is within the normal range but it rises and falls with increasing and decreasing rpms (when hot) that too is normal. However, if the oil pressure fluctuates at a constant rpm, idle or a set rpm, then I would take a look at the pressure relief valve, particularly the spring as it may have lost its set, the ball and seat as either may be pitted, or there may be dirt or sludge in the chamber.
Cheers,
Dave

[Michel D]

This is the problem! (the oil pressure fluctuates at a constant rpm).
But there is one thing that i am wondering on your engine were is connected the oil pipe going TO the filter!

[Bob Carriere]

Bonjour Michel

The oil line that goes to the oil filter has the pressure sensor conencted there..... the line that leaves the bottom of the filter is the return clean oil line to the engine and has even lower pressure.

It could be the electrical connector is contaminated with oil and you have a bad connection.

Have you tried installing a cheap mechanical gauge from Canadian tire.

You just need to instal a tee fitting between the oil line and the filter...connect the mechanical gauge to the tee fitting and you should get a reading that you can compare to the electrical gauge. If you have no knocking sound to the engine the temporary gauge may be a good way to do a test to see if the electrical guage is good.... or you maybe able to remove the existing sensor switch and instal a fitting to connect the mechanical gauge.....

Good luck

Boob

[Michel D]

all ready did it! same thing! the thing is this engine is not connected like yours
the 2 others are connected like yours.
this one is connected near the front of the engine under the alternator!
I would like to no if other pepole are connected like this!

[Bob Carriere]

Hi Michel

I went back to look at your diagram...... are you saying you have an external oil line that runs from the front of the engine,,,,, somewhere behind the big generator.....???

I have never seen that before...... not typical of any Dodge flat head whether it is a 207, 230, 251 or 265.......

Do you have a digital picture of the set up.......must go back to check some books....

Bob C.

[Michel D]

This is the picture!
i think this may be the problem i also have a 237 in a welder and has the same problem!