Problems with Subaru oil filters.
23 March 2011, 01:12 PM
#242
Hi,
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
What narks me is some people can't identify a worn idler pulley bearing or simply don't check them because it doesn't say so in the workshop manual (the 'shop manual assumes the mechanic already knows to check it).
How many Imprezas are there out there with a new cambelt running on idlers with dried up bearings.
Then what about the fuel filters? Seems everyone and his dog wants a Walbro pump, but totally neglects to change the fuel filter
Last edited by ALi-B; 23 March 2011 at 01:14 PM.
23 March 2011, 01:14 PM
#243
Scooby Regular
Join Date: Mar 2011
Location: Surrey
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
Hi,
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
So it's gonna either spill oil everywhere and go boom or squirt steaming hot water all over the place and go boom
You'll all be the first to know if it does
Last edited by BlobEyedRex; 23 March 2011 at 01:15 PM.
23 March 2011, 02:30 PM
#244
Former Sponsor
Join Date: Jul 2003
Location: www.scoobyclinic.com
Posts: 1,411
Likes: 0
Received 0 Likes
on
0 Posts
I might as well go and torch my scooby now. as 2 weeks ago the cambelt was replaced although got a Cosworth timing kit and it replaced tensioner and guide with billet item, no water pump.
So it's gonna either spill oil everywhere and go boom or squirt steaming hot water all over the place and go boom
You'll all be the first to know if it does
So it's gonna either spill oil everywhere and go boom or squirt steaming hot water all over the place and go boom
You'll all be the first to know if it does
hope you replaced your tyres when you fitted that billet cam belt guide.
You never know.
cheers
Kev
23 March 2011, 03:00 PM
#246
Scooby Regular
Join Date: Mar 2011
Location: Surrey
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
23 March 2011, 03:24 PM
#247
Re the bonnet, the blobeye sti bonnet don't half flex at high speed
People may decry forums but for the average Joe like me they're invaluable for info, advice and dare I say it entertainment. It is up to people to weigh up the information and make a PERSONAL and informed choice. Within this thread there are different schools of thought, both from respected and experienced camps. There will always be Chinese whispers within forums but by and large there is good, solid information.
23 March 2011, 03:40 PM
#249
ScoobyWorx
iTrader: (5)
Join Date: Oct 2010
Location: Barnsley SY
Posts: 768
Likes: 0
Received 0 Likes
on
0 Posts
Hi,
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
another rumour thats evolved from a forum is that the water pump needs replacing when the cam belt is changed.
This may be true for engines that use the water pump as a tensioner, once disturbed they tend to leak but not Subaru engines they have a separate tensioner and to be fair Subaru water pumps are very reliable.
However due to that thread we have had an upsurge in demand for perfectly good water pumps to be changed when replacing the cam belt, and many mail orders for cam belt kits with a water pump on top.
We advise accordingly but it falls on deaf ears most of the time.
Forums....
cheers
Kev
23 March 2011, 04:04 PM
#250
Scooby Regular
Join Date: Mar 2011
Location: Surrey
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
Bonnet flex too right, even at 30-40 the movement still gets me thinking is it gonna fly up
Opinions and hopefully lots of different ones is what makes forums great, being old enough to be around before the interweb, finding info & getting ideas was so much harder
23 March 2011, 04:07 PM
#251
Scooby Regular
Join Date: Mar 2011
Location: Surrey
Posts: 126
Likes: 0
Received 0 Likes
on
0 Posts
It did again, TYRES that's what I bloody meant, next test I'm gonna do is repeatedly hit this phone with a genuine filter & K&N filter see which filter lasts the longest or whether iPhone wins
23 March 2011, 07:03 PM
#254
I found with a couple of blueprint ones,the thread that the filter has to enable it to screw into place,on some,was more inwards whcih meant it only actually gripped with say,1 or 2 turns of the thread,rather than all the thread,if that makes sense ?
never leaked,but agai,to remove was a case of grip,twist and slight turn and it was loose/off
never leaked,but agai,to remove was a case of grip,twist and slight turn and it was loose/off
23 March 2011, 10:06 PM
#260
Is nobody concerned with getting an oil filter with the correct bypass valve fitted?
The only filters that have the correct bypass on this thread are the new and old subaru filters and the mazda rx8 filters yet still people say they're getting k&n or blueprint.
Also (as The Rig said) the sunken thread on the blueprint filters isn't great, they barely take much more than a thread deep when scewed on.
The only filters that have the correct bypass on this thread are the new and old subaru filters and the mazda rx8 filters yet still people say they're getting k&n or blueprint.
Also (as The Rig said) the sunken thread on the blueprint filters isn't great, they barely take much more than a thread deep when scewed on.
23 March 2011, 10:40 PM
#261
http://www.bobistheoilguy.com/forums...&Number=309756 This explains the bypass,as far as i know blueprint are oem spec and as you say k&n are set about 8lbs lower although i have used them for a few years without a problem.How i understand it if you use different grades of oil the same filter bypass will release at different times dependant on what oil you have .Although im not sure of anything anymore.
23 March 2011, 10:57 PM
#262
Yes, it was the point I was making earlier in the thread.
Obviously the bypass is related to pressure differential, most people on here use a thicker oil than subaru spec and the cold bypass and high rpm bypass is going to be greater on these oils imo. Pair that with a low bypass sprung filter such as the k&n and it makes you wonder how much less filtration will be going on over 6 months of cold starts? Enough to be causing more wear than the OE filter?
Subaru spec'd a filter with a high pressure bypass spring to keep up with the pump flow and maintain filtration when a lower sprung filter would be partially bypassing the filter media.
Obviously the bypass is related to pressure differential, most people on here use a thicker oil than subaru spec and the cold bypass and high rpm bypass is going to be greater on these oils imo. Pair that with a low bypass sprung filter such as the k&n and it makes you wonder how much less filtration will be going on over 6 months of cold starts? Enough to be causing more wear than the OE filter?
Subaru spec'd a filter with a high pressure bypass spring to keep up with the pump flow and maintain filtration when a lower sprung filter would be partially bypassing the filter media.
24 March 2011, 01:45 AM
#264
Yes, it was the point I was making earlier in the thread.
Obviously the bypass is related to pressure differential, most people on here use a thicker oil than subaru spec and the cold bypass and high rpm bypass is going to be greater on these oils imo. Pair that with a low bypass sprung filter such as the k&n and it makes you wonder how much less filtration will be going on over 6 months of cold starts? Enough to be causing more wear than the OE filter?
Subaru spec'd a filter with a high pressure bypass spring to keep up with the pump flow and maintain filtration when a lower sprung filter would be partially bypassing the filter media.
Obviously the bypass is related to pressure differential, most people on here use a thicker oil than subaru spec and the cold bypass and high rpm bypass is going to be greater on these oils imo. Pair that with a low bypass sprung filter such as the k&n and it makes you wonder how much less filtration will be going on over 6 months of cold starts? Enough to be causing more wear than the OE filter?
Subaru spec'd a filter with a high pressure bypass spring to keep up with the pump flow and maintain filtration when a lower sprung filter would be partially bypassing the filter media.
Yup; 10w-60 and 15w-50 users take note.
24 March 2011, 04:43 PM
#268
Is nobody concerned with getting an oil filter with the correct bypass valve fitted?
The only filters that have the correct bypass on this thread are the new and old subaru filters and the mazda rx8 filters yet still people say they're getting k&n or blueprint.
Also (as The Rig said) the sunken thread on the blueprint filters isn't great, they barely take much more than a thread deep when scewed on.
The only filters that have the correct bypass on this thread are the new and old subaru filters and the mazda rx8 filters yet still people say they're getting k&n or blueprint.
Also (as The Rig said) the sunken thread on the blueprint filters isn't great, they barely take much more than a thread deep when scewed on.
Have Subaru ever officially made a statement as to why they changed from Roki (old oem & 'new' Mazda RX8) ...to Honeywell (new blue)??