French Ford LTD Station Wagon 1978 | Page 4 | FordForumsOnline.com
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French Ford LTD Station Wagon 1978

Discussion in 'Ford LTD' started by The Lion King, Jul 29, 2019.

  1. Action

    Action Moderator Staff Member Respected Member

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    Assuming this is a oil pressure thing.

    The issue could be the sender. You are doing good to get a manual pressure gauge.
    I forget the pressure that the warning light sender is set for.

    Engine oil thins down after it gets hot. So would explain why the light comes on after the engine has been run for some time.

    Do post the oil pressure readings. If you have a shop manual the normal oil pressure readings would be in the engine section.

    Action
  2. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    Very good long read on the 351m/400
    engines
    Toward the last they mention oil presuure and what kind of pump to use

    https://www.projectbronco.com/Technical_Articles/Dispelling_the_rumors.htm
  3. The Lion King

    The Lion King Member

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    For what I read, my standard melling oil pump should have done the job. I have a high volume melling oil pump for 400, if I can proove that the actula new melling oil pump failed, I'll replace it by high volume pump, no choice...
  4. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    Have you taken the pan off yet?
  5. The Lion King

    The Lion King Member

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    Nope. I'm going to take oil pressure measurements tomorrow. Can you show me the correct values to have for a correct oiling?
  6. Action

    Action Moderator Staff Member Respected Member

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    Test when oil is hot.
    PSI should be 30 to 50 at 2000 RPM
    At idle the psi will drop to 15 or so

    Action
  7. Action

    Action Moderator Staff Member Respected Member

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    To add to this - I think Ford only gives an oil pressure spec at 2000 engine RPM on hot oil.

    Your situation is the light comes on at idle on hot oil. Most senders are set for 3 to 5 PSI which is pretty low. Other causes -
    Oil filter issues - restricted
    Weight of oil is incorrect (Too light)
    Pump doesn't develope enough pressure
    Worn clearance parts in engine

    An oil pressure test is the correct diagnosis step.

    >>>>Action
  8. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    Read this or call Melling
    https://www.melling.com/aftermarket-parts/international/melling-u-k/technical/
  9. The Lion King

    The Lion King Member

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    This is the end.

    Here's the oil we extract from the oilpan. It has 20 miles.

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_IMG_2020052cb6b922063dbe111e914b0d24a9a15d4.jpg

    Here's the oilpan:

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_IMG_2020052a4330ff463fa5545ff40ffe4149827c5.jpg

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_IMG_20200529094ea2cef7fc51b629042775400e6d4.jpg

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_xxx.jpg.712a26026f7274ffbab454976b49abec.jpg

    And the rod bearings:

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_IMG_2020052bb9e69ac8ffe76333ae91ebbfbf36dde.jpg

    Remember that this engine did less than 200 miles...

    We tried to replace the oil pump anyway, with no results. We read 7 psi at hot idling, and never more than 25 at 2000 rpm. No matter which pump we use.

    If you have any ideas, please let me know, because at this point, I'm totally stuck.
  10. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    Didn't you buy a reman engine?
    I was bothered the other day when you posted shavings in the oil
    Did you replace the oil pump pick screen and tube?
    I tried to look up oil pump then oil pump tube and screen and there is some confusion on tha to me
    That the reason I said to call Melling
    they said in one of the articles you had to prime the pump in a certain way
    You aren't oiling right
    I can't really tell by looking at the oil
    Does it have water in it?
  11. The Lion King

    The Lion King Member

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    Yes, I bought a reman engine. It's a rockauto one.

    I replace oil pump, oil pickup tube and screen by the one provided with the engine.

    I did have oil pressure at the beginning, the light didn't show up until yesterday.

    I read the melling website, and I can read this:

    Be sure to prime these pumps according to their manufacturer’s instructions. We strongly recommend that you prime the whole engine with an external priming device before start-up.

    This is exactly what we did. We primer the whole engine using the oil light sensor to be sure that pressure reaches the top of the engine, and we also verified that oil was coming through the valve covers, both side.

    I can't really imagine that we did not primer it correctly.

    No water in oil for sure, no gas ever.
    Last edited: May 26, 2020
  12. Action

    Action Moderator Staff Member Respected Member

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    Wow!

    If you had pressure and now do not, on a new engine, something has opened up. An excessive gap in a bearing would be my guess. No oil pump can overcome a big leak because a bearing has worn out. Rod, crank or cam.
    You can plastigauge the rod and crank bearings to see the clearance.
    By the time the oil gets to the top of the engine nearly all of the pressure is gone.

    25PSI at 2000K RPM is too low!!!!

    I do not like any of those pictures. The pan or the rod bearing.

    Action
  13. The Lion King

    The Lion King Member

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    I do not like any of those pictures

    So imagine when you have it front of you... :confused:

    We do not know why, the only way to know is to open up. We are going to reinstall the old engine, with a new timing chain, juste to allow the car to move from where is it. Then we'll investigate... but I do not know where to start, it's the first time I ever see a problem like that, moreover on a new engine!!
  14. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    I'm searching for answers
    What did the pick tube look like
    was It plugged up?
    Can I ask a stupid question
    Here goes
    Photo 1
    Is that the pickup tube or what is it
  15. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    What's that gray goop in the oil pan
    Silicone?
  16. The Lion King

    The Lion King Member

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    The gray goop, it's metal.

    And this (what you called "photo 1" I guess):

    awww.dreams_cars.org_forum_uploads_monthly_2020_05_IMG_2020052cb6b922063dbe111e914b0d24a9a15d4.jpg

    Is the oil, on a bucket, resulting of oil draining. Filled with liquid metal like a T-1000.
    Last edited: May 26, 2020
  17. Action

    Action Moderator Staff Member Respected Member

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    That metal came from somewhere. Unfortunately.

    And is likely causing the loss in oil pressure. Pressure is only possible with a system that has restrictions. Decrease the restriction and the pressure goes down.

    I feel for you!!!
    Seems like you did everything correctly.

    >>>>>Action
  18. 70XL

    70XL Active Member

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    I'd also call Rock Auto and find out what the warranty is on the engine. You need real oil pressure readings from a proper gauge set up, but that is more difficult with it out of the car. That looks like a lot of bearing material in the oil pan, but make sure to turn the flash off on your camera/phone in order to show what the oil really looks like. The photos capture the surface reflection, but not the true character of the oil. I sure hope the remanufacturer will set up for you, some how.
    Action and Dominick 1 like this.
  19. Dominick 1

    Dominick 1 Well-Known Member Respected Member

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    No it's the first picture in oil pan
  20. The Lion King

    The Lion King Member

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    The black thing at the bottom left is my finger with glove

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