Filling oil filters before fitting....do you?

[Trundlebug]

OK, let's go with the "Equivalent to the wear of 30 normal starts". Modern cars have two year service intervals, in that time a car will be started 1500 to 2000 times, let's be generous and say 1500. A service, without pre-filling the filter imposes the same wear as 30 of those starts. So, 50 services imposes the same wear as starting the car normally between two services (two years). So you'd need to service the car for 100 years to impose the same wear as starting it normally for 2 years.

Either way, all the bearing surfaces are still coated with oil, it's not like you're starting it with dry surfaces. If there was any merit at all in pre-filling filters manufacturers would insist on it, now we have 100,000 mile warranties etc.

If you are happy to waste your time doing it, that's your choice. But, please don't say that professionals fail to do it because of the time it takes and that they don't care. Some don't care, some of us do.

Paul,

I wasn't intending to be derogatory about professionals, just realistic.
FYI the OP was talking about KAD43's, i.e. boats not cars. Different service intervals and usage pattern.
I've no idea what the stats are, but you cannot deny that the longer an engine runs without oil pressure, the more wear takes place.

Yes, they're clearly designed to withstand normal starting and quite probably will be fine if the oil filters aren't pre-filled. As I said (or at least implied) in my first post I believe.

However, for those who really want to minimise engine wear it is good practice to pre-fill. Logic. Especially in older boats with older engines - which are already worn to some extent, and may not be specified with the latest fully synthetic oils with "magnatec" type surface clinging friction reducer additives etc.

 

[lynall]

I think you are all forgetting most modern vehicles dont use metal canister filters instead using the paper only type which cant be prefilled! even my boats got a paper only type.
If you lot saw what went on in professional car/truck workshops you would be frightened!
Doesnt matter how smart they are on the outside in the shop it always the same.
Ive been spannering for over 25 years now and as another poster has said ive never filled a canister oil filter yet, but do with fuel filters as it gives the starter an easier time.


Lynall

 

[tinkicker0]

Hi
Drained the oil in my KAD43's yesterday and replacing the filters and filling with oil today. I usually fill the new filters before fitting but it does add to the general bother, messiness and probability of spills of the operation.....is this really necessary? I wonder what the professionals do?

Always fill spin on filters with oil if configuration allows it. Fuel filters - never.

 

[DavidJ]

Thanks to all for your replies.
In the end I guess I compromised by part filling the cannister and at the same time lubricating the thread and the oil seal. This also gives a bit of weight so it will stand upright on the engine untill I get the old one off.
Incidentally I put a gallon size Ziplock bag around the old cannister while unscrewing it and it contains any spills. Then just zip up and ready to dispose of.
I didn't measure it but full pressure came up in less than 10 seconds, so I'm comfortable with that.
Thanks again for all your views.