Wrong oil filter likelihood of damage ?

Wrong oil filter likelihood of damage ?

Author
Discussion

del mar

Original Poster:

2,838 posts

200 months

Tuesday 9th October 2018
quotequote all
Evening,

Main dealer has no oil filters left.

Various online catalogue cross reference it to a Mann W77.

However it is a different size, slightly smaller.

Is external size a big issue providing it operates at the correct pressure ?

Thanks

Del





Boosted LS1

21,189 posts

261 months

Tuesday 9th October 2018
quotequote all
In a nutshell it may need changing sooner? No big deal, how many miles do you drive in between changes? I'm sure there are better filters to be had if you look.

227bhp

10,203 posts

129 months

Tuesday 9th October 2018
quotequote all
No it won't, it's a common filter so a few minutes on Google will give you plenty of alternatives.

del mar

Original Poster:

2,838 posts

200 months

Tuesday 9th October 2018
quotequote all
Thank you.

Car might do 1500 miles a year so that isn’t an issue.


ninjag

1,834 posts

120 months

Tuesday 9th October 2018
quotequote all
I would think that size, within reason, shouldn't really matter and it's more the micron size which is important?

Sardonicus

18,969 posts

222 months

Tuesday 9th October 2018
quotequote all
Cross ref from the OE part number on the Mann cross ref chart wink I have faith in Mann filters and so do major car manufacturers like VAG and BMW etc

99hjhm

426 posts

187 months

Tuesday 9th October 2018
quotequote all
Actually been fitting this exact filter on a Jowett Javelin race engine devolopment project over the last few years. Having split a few open the Mann is a fine oil filter, bloody small thing. It’s for a Renault?

del mar

Original Poster:

2,838 posts

200 months

Wednesday 10th October 2018
quotequote all
99hjhm said:
Actually been fitting this exact filter on a Jowett Javelin race engine devolopment project over the last few years. Having split a few open the Mann is a fine oil filter, bloody small thing. It’s for a Renault?
Renault 4 / 5 / 12

and

Maserati Ghibli .....

Kccv23highliftcam

1,783 posts

76 months

Wednesday 10th October 2018
quotequote all
Manns ate good. However I stopped short [no pun intended] of using the Transporter one on the 1.8tq

larger oil filter= more oil in system.

99hjhm

426 posts

187 months

Wednesday 10th October 2018
quotequote all
Kccv23highliftcam]Manns ate good. However I stopped short [no pun intended said:
of using the Transporter one on the 1.8tq

larger oil filter= more oil in system.
Yes on a Mk1 Golf race engines I'm currently preparing you can fit the mann w719/30, its a big boy oil filter! Think the car preparers might moan about the extra weight but great for the dyno with that extra filter area to look at, holds something like 0.5L more oil. Will still run out of oil at the same point no matter what the filter will hold.

Megaflow

9,464 posts

226 months

Tuesday 16th October 2018
quotequote all
del mar said:
Evening,

Main dealer has no oil filters left.

Various online catalogue cross reference it to a Mann W77.

However it is a different size, slightly smaller.

Is external size a big issue providing it operates at the correct pressure ?

Thanks

Del
Assuming all other factors are the same, then the only thing the actual size of the filter is directly related to is dirt holding capacity. The larger the filter the longer the service interval.

227bhp

10,203 posts

129 months

Tuesday 16th October 2018
quotequote all
Megaflow said:
Assuming all other factors are the same, then the only thing the actual size of the filter is directly related to is dirt holding capacity. The larger the filter the longer the service interval.
No that isn't the case, oil contains many more contaminants than those which are caught in the filter.

99hjhm

426 posts

187 months

Tuesday 16th October 2018
quotequote all
Funny how over the years service intervals have got longer and filters generally smaller. I know oil has improved etc.

A filter can be too small and therefore restrictive for the application, I remember fitting an external filter kit supplied by a ‘marque specialist’, started engine up and sod all oil pressure, opened filter up(element type) and it resembled an eaten apple, turned out it was for a Vauxhall Corsa and totally unsuited to the application.


227bhp

10,203 posts

129 months

Wednesday 17th October 2018
quotequote all
99hjhm said:
Funny how over the years service intervals have got longer and filters generally smaller. I know oil has improved etc.

A filter can be too small and therefore restrictive for the application, I remember fitting an external filter kit supplied by a ‘marque specialist’, started engine up and sod all oil pressure, opened filter up(element type) and it resembled an eaten apple, turned out it was for a Vauxhall Corsa and totally unsuited to the application.
Market forces. People want a car that doesn't need servicing very often so it's an advantage to them when a car with only 5L of oil in it won't need servicing until 12k miles so that's what they get. Then they think because that's safe they can stretch it a bit more so it goes to 15k. Because were all forced to drive around at reduced pace these days many engines never see more than 3000rpm or get warmed up properly so there's another nail in the coffin.
To the manufacturers and the first few owners it doesn't matter so it carries on, it's only down the line that the problems occur and by that time it's a cheap s/h car and well out of manufacturer warranty so no-one cares. You won't ever see a poor turbo reconditioner who has no work on that's for sure.

I recently helped a friend do a Ford Focus which was using oil at a terrific rate. Head off we turned it over on the stand and he loosened off the big ends one by one, I caught the piston and rod as it fell out! No ring tension whatsoever - they were all solidly gummed up in the grooves. That one was lucky, what normally happens is the owner doesn't notice the increased oil consumption and the big ends take a hit, this one just had a couple of mild skid marks on the bearings so it had been caught just in time.

Sardonicus

18,969 posts

222 months

Wednesday 17th October 2018
quotequote all
Agree totally with above wink and see this attitude often, but my main gripe is owners not checking oil even after they are warned that the model is prone to oil consumption e.g just yesterday Mini one owner complained the engine sounded thrashy until he put over 3 litres of oil it and almost sounding like he was bragging he had self diagnosed banghead he was the owner FFS rolleyes piston rings carbon gumming are quite an issue nowadays not helped by more and more performance in mind piston styles scratchchin even Toyota models are not exempt from oil consumption nowadays



Edited by Sardonicus on Wednesday 17th October 09:32

227bhp

10,203 posts

129 months

Wednesday 17th October 2018
quotequote all
They just don't understand what is going on under the bonnet which is understandable. As far as they are concerned fuel goes in that flap at the back, some magic occurs under the bonnet and they move down the road. If something is wrong a warning light will come on right? Then we'll give the engine whatever it needs and carry on.
I went to pick one up the other week, owner described it as 'making a lot of noise, engine not working' I struck up conversation with him. "Has it ever been run low on oil?" I asked, "No never" he lied.
It turns out when the engine started rattling and knocking he carried on driving, he even drove it to his local garage and back in this condition to get a diagnoses! Him and his mate then revved it on the drive whilst filming it, and asking random strangers on the 'net what they thought it was until eventually it stopped running completely.

We pulled it and stripped it, the bearings had spun and worn to the thickness of tracing paper on what was left of them. The piston had been allowed to go so far up because of this it had hit the head and the valves. It had then come down so far the crank counterweight whacked it smashing the skirt and splitting the top half off where it was stuck in the combustion chamber.
Still he carried on running it. The rod went up and down on its own for a while putting deep grooves in the bore before the cap came off.
He only stopped because the timing ring on the crank pulley (which is a press in fit) came loose and fell off, I can only presume it walked off the job due to the vibrations.
Every main component was scrap (as was the car now). If he'd just stopped in the first place it would have been a relatively easy fix.




Sardonicus

18,969 posts

222 months

Wednesday 17th October 2018
quotequote all
227bhp said:
I went to pick one up the other week, owner described it as 'making a lot of noise, engine not working' I struck up conversation with him. "Has it ever been run low on oil?" I asked, "No never" he lied.
It turns out when the engine started rattling and knocking he carried on driving, he even drove it to his local garage and back in this condition to get a diagnoses! Him and his mate then revved it on the drive whilst filming it, and asking random strangers on the 'net what they thought it was until eventually it stopped running completely
laughroflhehe I have just spat out a mouthful of Alpen reading this beer absolute classic biggrin

227bhp

10,203 posts

129 months

Wednesday 17th October 2018
quotequote all
Sardonicus said:
227bhp said:
I went to pick one up the other week, owner described it as 'making a lot of noise, engine not working' I struck up conversation with him. "Has it ever been run low on oil?" I asked, "No never" he lied.
It turns out when the engine started rattling and knocking he carried on driving, he even drove it to his local garage and back in this condition to get a diagnoses! Him and his mate then revved it on the drive whilst filming it, and asking random strangers on the 'net what they thought it was until eventually it stopped running completely
laughroflhehe I have just spat out a mouthful of Alpen reading this beer absolute classic biggrin
Oh there are plenty more, there is no shortage of daft and untruthful people. Sadly I have to work and don't know if anyone else is interested in my rambling. party

Sardonicus

18,969 posts

222 months

Wednesday 17th October 2018
quotequote all
227bhp said:
Sardonicus said:
227bhp said:
I went to pick one up the other week, owner described it as 'making a lot of noise, engine not working' I struck up conversation with him. "Has it ever been run low on oil?" I asked, "No never" he lied.
It turns out when the engine started rattling and knocking he carried on driving, he even drove it to his local garage and back in this condition to get a diagnoses! Him and his mate then revved it on the drive whilst filming it, and asking random strangers on the 'net what they thought it was until eventually it stopped running completely
laughroflhehe I have just spat out a mouthful of Alpen reading this beer absolute classic biggrin
Oh there are plenty more, there is no shortage of daft and untruthful people. Sadly I have to work and don't know if anyone else is interested in my rambling. party
I have a few too biglaugh sadly much like yourself I only get to go on here in between jobs or whilst hanging on for customers or on the phone making parts enquiries frown