I have just found out I have been fitting the wrong oil filter a Mann w79 to
my petrol engine this seams to be for the diesel engined model even though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one has
a bypass pressure of 2.0......will I have done any damage to my engine given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....

"Jim" wrote in message
...
I have just found out I have been fitting the wrong oil filter a Mann w79
to my petrol engine this seams to be for the diesel engined model even
though it is the same size in all respects......I should have been be
fitting a Mann w75/3 .....This has a bypass pressure of 1.3 bar and the
diesel one has a bypass pressure of 2.0......will I have done any damage to
my engine given that the bypass doesn't only operate when the filter is
blocked but also opens when the oil is cold etc.....

....and why would a diesel and a petrol engine have different inlet and
outlet bypass pressures ?

On 13/05/2019 12:36, Jim wrote:
"Jim" wrote in message
...
I have just found out I have been fitting the wrong oil filter a Mann w79
to my petrol engine this seams to be for the diesel engined model even
though it is the same size in all respects......I should have been be
fitting a Mann w75/3 .....This has a bypass pressure of 1.3 bar and the
diesel one has a bypass pressure of 2.0......will I have done any damage to
my engine given that the bypass doesn't only operate when the filter is
blocked but also opens when the oil is cold etc.....

...and why would a diesel and a petrol engine have different inlet and
outlet bypass pressures ?


Diesels run at higher compression ratios. Although they don't see the
same peak load down the con-rod as during the "bang" of a petrol engine,
they generally use larger big-ends to keep the stress levels on the
white metal down. I can only assume they use different BP pressures for
related reasons.

That said, I wouldn't be panicking that you have wrecked your engine.

---
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On Monday, 13 May 2019 12:13:46 UTC+1, Jim wrote:

I have just found out I have been fitting the wrong oil filter a Mann w79 to
my petrol engine this seams to be for the diesel engined model even though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one has
a bypass pressure of 2.0......will I have done any damage to my engine given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....

Start engine, remove filler cap. You should know whether oil is circulating from cold. If not, switch off right away & replace filter. I wuoldn't expect a problem though.


NT

"Jim" wrote in message
...

"Jim" wrote in message
...
I have just found out I have been fitting the wrong oil filter a Mann w79
to my petrol engine this seams to be for the diesel engined model even
though it is the same size in all respects......I should have been be
fitting a Mann w75/3 .....This has a bypass pressure of 1.3 bar and the
diesel one has a bypass pressure of 2.0......will I have done any damage
to my engine given that the bypass doesn't only operate when the filter is
blocked but also opens when the oil is cold etc.....

...and why would a diesel and a petrol engine have different inlet and
outlet bypass pressures ?

that is what I was wondering ....

wrote in message
...
On Monday, 13 May 2019 12:13:46 UTC+1, Jim wrote:

I have just found out I have been fitting the wrong oil filter a Mann w79
to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....

Start engine, remove filler cap. You should know whether oil is
circulating from cold. If not, switch off right away & replace filter. I
wuoldn't expect a problem though.


NT

good idea thanks ....

"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann w79 to
my petrol engine this seams to be for the diesel engined model even though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one has
a bypass pressure of 2.0......will I have done any damage to my engine given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann w79
to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles

"Jim" Wrote in message:

"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles




Think it'll be fine then.
--
Jim K


----Android NewsGroup Reader----
http://usenet.sinaapp.com/

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:

"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting
a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel
one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but
also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles




Think it'll be fine then.

good ...I've sent for a few of the specified w75/3 filters anyway.....

On Monday, 13 May 2019 19:47:28 UTC+1, Jim wrote:
"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:

I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles

you'd have known about it long ago if it weren't passing oil when needed.


NT

On 13/05/2019 19:47, Jim wrote:
"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles



= 7,500 miles per year. Why bother with diesel for that
mileage ?.

Andrew wrote:
On 13/05/2019 19:47, Jim wrote:
"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles



= 7,500 miles per year. Why bother with diesel for that
mileage ?.


Maybe thats why hes running a petrol car?

Tim

--
Please don't feed the trolls

"Andrew" wrote in message
...
On 13/05/2019 19:47, Jim wrote:
"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be fitting
a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel
one
has
a bypass pressure of 2.0......will I have done any damage to my engine
given
that the bypass doesn't only operate when the filter is blocked but
also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles



= 7,500 miles per year. Why bother with diesel for that
mileage ?.

I didn't and I have three cars....and an electric moped...tee hee

"Tim+" wrote in message
...
Andrew wrote:
On 13/05/2019 19:47, Jim wrote:
"Jim" wrote in message
...

"Jim K.." wrote in message
o.uk...
"Jim" Wrote in message:
I have just found out I have been fitting the wrong oil filter a Mann
w79 to
my petrol engine this seams to be for the diesel engined model even
though
it is the same size in all respects......I should have been be
fitting a
Mann w75/3 .....This has a bypass pressure of 1.3 bar and the diesel
one
has
a bypass pressure of 2.0......will I have done any damage to my
engine
given
that the bypass doesn't only operate when the filter is blocked but
also
opens when the oil is cold etc.....


How long has it been running with the "wrong" filter in?

coming up for four years ......

30,000 miles



= 7,500 miles per year. Why bother with diesel for that
mileage ?.


Maybe that's why he's running a petrol car?

Tim

good somebody who can read....tee hee