LanceVance Posted June 2, 2013 Share Posted June 2, 2013 I recently purchased an HKS pop off/diverter/blow off valve (whatever the appropriate term is) that I believe is the same piece that would have gone on an HKS Type 2 Surge tank for the Nissan L series motors (see pictures below). What I am hoping is that someone might have some documentation that would include some part numbers or any information that might help me track down an extra diaphragm for this part. The one I have is in good condition, but living in the west Texas desert means that rubber parts can be short lived... I'm also needing to track down a stainless flange for this, so I'm curious if anyone is familiar with the flange size? What modern BOVs would be compatible (easier to get a new flange if it matches a known new BOV) with this flange, for those of you not using the original piece? I've searched for information regarding the valve itself, but have come up empty handed, so now I'm hoping someone with the surge tank might have the information I need. The surge tank (including valve): My valve (more pictures in my gallery): Thanks to anyone that can help! Quote Link to comment Share on other sites More sharing options...
TimZ Posted June 2, 2013 Share Posted June 2, 2013 Do a Google search for "HKS Standard Bypass Valve". Looks like Alamo Motorsports still sells the diaphragm. Quote Link to comment Share on other sites More sharing options...
LanceVance Posted June 3, 2013 Author Share Posted June 3, 2013 (edited) Thanks! Looks like part no: 17672-002100 may be what I'm looking for. I've found a few other sources, but none with any pictures, so until I've got it in hand I'm not 100%. On a side note, while searching that part number I came across a post (On an Australian Skyline forum I believe) that indicated that a standard 45mm GReddy flange should be the appropriate size flange for this. I've ordered one, so I'll confirm when I have it in hand. The flange that came with the valve when I bought it is slightly smaller than the GReddy piece, and appears to create a choke point. That will teach me for not measuring off the gasket or actual body of the valve itself; it seems I've been chasing after some oddball part! Edited June 3, 2013 by LanceVance Quote Link to comment Share on other sites More sharing options...
Tony D Posted June 3, 2013 Share Posted June 3, 2013 They still sell the flanges at HKS Japan... Quote Link to comment Share on other sites More sharing options...
mildsquare Posted June 11, 2013 Share Posted June 11, 2013 Sweet! I was wondering about a replacement diaphragm for my type 1 tank. Happy I saw this post. Thank you for the info. Quote Link to comment Share on other sites More sharing options...
nismo_zxt Posted August 31, 2013 Share Posted August 31, 2013 (edited) I've 2 of those hks bypass valve and one Big racing hks blow-off valve. Bolt fit on the hks surge tank blow-off flange on the side. I will take a look tomorrow if I could get more info on the flange. But if the big racing bov fit on the same flange as the std bypass bov, It could be a nice idea to look at the flange for the big hks racing type 1 bov. It's good idea to group search this replacement part. If anyone found it I will take 2. Edited August 31, 2013 by nismo_zxt Quote Link to comment Share on other sites More sharing options...
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