Does anyone have a trusted source for the water pump studs (N3A1-10-C08)? The studs are NLA from Ray and I've been unable to find them from any of the usual suspects. There is a kit available from Himni, but they seem to have mixed reviews.

 

Regular bolts work too if it comes down to it

 

https://www.amayama.com/en/part/mazda/n3a110c08

used is an option too

 

I used the Himni stainless kit. No complaints on it.
https://www.himni-racing.com/index.p...oducts_id=1803

If you know the length of the OEM stud you might just be able to find a generic one that will fit.

 

^This. Both ends of the stud are threaded M8-1.25, once you have the correct length, you should be able to find some on McMaster-Carr, Fastenal or Grainger

 

Thank you for the input. I am going to use the following hardware from McMaster-Carr to replace the water pump housing studs.

• 18-8 stainless hex head screw, M8 x 1.25, 110mm length (Part: 91287A317)
• 18-8 stainless M8 conical lock washer (Part: 91477A181)

The stock stud has approximately 10mm of thread engagement with the block and the block hole is >15mm deep. The parts mentioned above will give almost exactly the same 10mm engagement with the block. I also got the following to secure the water pump to the housing.

• 18-8 stainless hex head screw, M6 x 1.00, 20mm length (Part: 91287A137)
• 18-8 stainless M6 conical lock washer (Part: 91477A161)

You'll want to get some M8 x 1.25 nuts to remove the original water pump housing studs as the original nuts strip when used.

 

Elite sells water pump studs.