The following is a cheap & easy(ish) solution for the annoying filter drain back found with some FB20 FA20 engines (top mnt filter). And that is to “simply“ use a filter with both an anti-siphon valve and anti-drainback valve. Although depending on where you live, finding one of these filters may take more effort than just 2 clicks on Amazon. But these filters can be had for less than 10 bucks, which is a lot less than the $260 Baxter charges for their anti-drain adapter. And they are direct fit with no mods. I’ll give background on how we came up with this Simple solution after I give some tips on How to find the Filters on the interwebs.
The easiest solution in the US Is to use a genuine OEM Kia filter 0FE3R14302 (google it). I got 3 on eBay for $15 delivered. I have no idea if these are NLA. But it has both valves and stopped the rattle on a friend’s ‘15 XT Forester. Of course, Most If not all the US will-Fit filters for this OEM PN probably do not have both valves (from what I can tell). However, for filters in Europe, it is not too difficult to find ones with valves. Filtron OP597 (NOT OP597/1 !!), Hengst H97w08, Mahle OC194, Mann W610/2 and W610/81, Sofima S3261R, UFI 23.2600.00. Tough to find in USA. The Filtron Link below has a very large interchange list. With applications, and many OEM Numbers (Mazda, Ford, Kia). The caution is all on this interchange list do not have valves. For example, list has both Fram PH4913 & PH5343. I think only 4913 has the valve and is NLA. List has Motorcraft FL821 which had the valve but is NLA, I think. On most the major Euro filter Mfg sites, the spec sheet will indicate if The PN has an anti-siphon valve explicitly, or with a cryptic specification of “R:2”. 2 means two anti-drain device. 1 means only one and you guessed it, 0 means none. I’ll show pics Illustrating in a reply to this post next post plus on how to physically ID (valve looks like an upper bypass but it’s not).
Interchange and filter specs.
Filtron OP597 specs link
A colleague of mine in Europe and I figured this out over beers awhile ago. He recently was relocated to Europe (Cummins engineer) and his family took two Subaru’s over (not a common sight on the Autobahn!). We had a work problem where Filters with a standpipe and one with anti-siphon were being tested. So we said, hey let’s find one for his subbies. We found a couple MANN&Hummels and installed. Cold start rattle went away Decent test as he and his wife only drove about once or twice a week so the cars sit quite awhile before start up. Whe I returned to US I found the Kia filter mentioned above.
Maybe this is not new info for anybody here amongst the filter geeks. Maybe somebody else knows a real Easy way to get a suitable anti-siphon filter in the US. I’m done looking into this as I don’t own a Subie. Just sharing a cheap and easy(ish) solution to an annoyance.
One thing we didn’t look into much was a filter with a standpipe. We check Donaldson, Fleetguard and Baldwin and saw none on M20 thread. Technically I prefer the standpipe due to its simplicity. Moving parts with the anti-siphon.
The easiest solution in the US Is to use a genuine OEM Kia filter 0FE3R14302 (google it). I got 3 on eBay for $15 delivered. I have no idea if these are NLA. But it has both valves and stopped the rattle on a friend’s ‘15 XT Forester. Of course, Most If not all the US will-Fit filters for this OEM PN probably do not have both valves (from what I can tell). However, for filters in Europe, it is not too difficult to find ones with valves. Filtron OP597 (NOT OP597/1 !!), Hengst H97w08, Mahle OC194, Mann W610/2 and W610/81, Sofima S3261R, UFI 23.2600.00. Tough to find in USA. The Filtron Link below has a very large interchange list. With applications, and many OEM Numbers (Mazda, Ford, Kia). The caution is all on this interchange list do not have valves. For example, list has both Fram PH4913 & PH5343. I think only 4913 has the valve and is NLA. List has Motorcraft FL821 which had the valve but is NLA, I think. On most the major Euro filter Mfg sites, the spec sheet will indicate if The PN has an anti-siphon valve explicitly, or with a cryptic specification of “R:2”. 2 means two anti-drain device. 1 means only one and you guessed it, 0 means none. I’ll show pics Illustrating in a reply to this post next post plus on how to physically ID (valve looks like an upper bypass but it’s not).
Interchange and filter specs.
Filtron OP597 specs link
A colleague of mine in Europe and I figured this out over beers awhile ago. He recently was relocated to Europe (Cummins engineer) and his family took two Subaru’s over (not a common sight on the Autobahn!). We had a work problem where Filters with a standpipe and one with anti-siphon were being tested. So we said, hey let’s find one for his subbies. We found a couple MANN&Hummels and installed. Cold start rattle went away Decent test as he and his wife only drove about once or twice a week so the cars sit quite awhile before start up. Whe I returned to US I found the Kia filter mentioned above.
Maybe this is not new info for anybody here amongst the filter geeks. Maybe somebody else knows a real Easy way to get a suitable anti-siphon filter in the US. I’m done looking into this as I don’t own a Subie. Just sharing a cheap and easy(ish) solution to an annoyance.
One thing we didn’t look into much was a filter with a standpipe. We check Donaldson, Fleetguard and Baldwin and saw none on M20 thread. Technically I prefer the standpipe due to its simplicity. Moving parts with the anti-siphon.
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