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Oil filter torque spec - service manual or filter rating?

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MCN
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Joined: 22 Jul 2015
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PostPosted: 22:12 - 17 Dec 2017    Post subject: Reply with quote
When an engine is assembled all surfaces that run next to each other are coated with oil. This film of oil protects the surfaces until the lubrication system fills.
If you are changing a filter you do not wipe all the oil off all the bearing surfaces so what is all the excitement about pre-filling?
As long as you don't start up and bang load on the engine absolutely zero harm will be done in the short time it takes to fill with the engine at idle.
More damage seems to be done by some folks wringing their hands and twisting their knickers over it all.
To much myth and mystery around.
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Disclaimer: The comments above may be predicted text and not necessarily the opinion of MCN.
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Fizzer Thou
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Joined: 06 Aug 2011
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PostPosted: 00:48 - 18 Dec 2017    Post subject: Reply with quote
Fizzer Thou wrote:
One tip I would advise on is to prime the new oil filter before installation.You will be surprised how much oil the filter will soak up.


What I suggested was a tip.Not something written in any workshop manual.It is something that I choose to do and there is nothing that has been written so far that will change the way that I choose to do an oil filter change.Should someone decide one way or the other,that is completely down to them.
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MCN
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Joined: 22 Jul 2015
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PostPosted: 11:01 - 18 Dec 2017    Post subject: Reply with quote
Fizzer Thou wrote:
Fizzer Thou wrote:
One tip I would advise on is to prime the new oil filter before installation.You will be surprised how much oil the filter will soak up.


What I suggested was a tip.Not something written in any workshop manual.It is something that I choose to do and there is nothing that has been written so far that will change the way that I choose to do an oil filter change.Should someone decide one way or the other,that is completely down to them.


Some tips are better than others.

Very Happy

There are specific reasons to need 'special' start-Up procedures.
Big engines almost always require a pre-lube sequence primarily to lift the crankshaft up and prevent bearing wear (the main bearing at the flywheel end is the most vulnerable as the weight of the flywheel squeezes the oil film from between the c/shaft journal and bearing)
Arnd to fill large capacity lubrication systems that need more time to fill.
This would be required for every start and the engine will have an interlock to prevent starting until a pre-set oil pressure is acheived via an external pump system.

Small engines do not have massive heavy parts so their oil film is sufficient to provide start-up protection.

Exceptions for units removed from long term storaģe.
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Fizzer Thou
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Joined: 06 Aug 2011
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PostPosted: 21:17 - 18 Dec 2017    Post subject: Reply with quote
MCN wrote:
There are specific reasons to need 'special' start-Up procedures.
Big engines almost always require a pre-lube sequence primarily to lift the crankshaft up and prevent bearing wear (the main bearing at the flywheel end is the most vulnerable as the weight of the flywheel squeezes the oil film from between the c/shaft journal and bearing)
Arnd to fill large capacity lubrication systems that need more time to fill.
This would be required for every start and the engine will have an interlock to prevent starting until a pre-set oil pressure is acheived via an external pump system.

Small engines do not have massive heavy parts so their oil film is sufficient to provide start-up protection.

Exceptions for units removed from long term storaģe.


It is all very well to quote word for word from a technical manual that you found on the net,but you have yet to explain how you might introduce 'shit' into either an oil filter or the engine filler hole?

Or how an oil filter will deteriorate?
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stevo as b4
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Joined: 17 Jul 2003
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PostPosted: 23:40 - 19 Dec 2017    Post subject: Reply with quote
All this special start up and lubrication proceedures sounds very Big diesel engine talk to me.

Ive long observed that the bigger the engine the more anal and fussy people are about them, and the more exacting and fastidious the maintenance requirements are.

Next we'll be back onto talking about cleaning and purification of used engine oil with Laboratory analysis. None of which has any place on any highway operated vehicle IMO.
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Old Thread Alert!

The last post was made 6 years, 121 days ago. Instead of replying here, would creating a new thread be more useful?
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