What plugs this hole in the block? By Rear main seal See PIC

[1997_GSX]

Well I know its some sort of oil passage but what goes in here, it is threaded and what is the thread pattern?

Thanks, Luke

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[Rob10_99]

That looks like the back side of the BS/oil squirter galley, I'm considering tapping/welding the opposite side of the block because I'm eliminating the BS/squirters on my block.

 

[1997_GSX]

Can anybody look on caps for an oem number. I would but caps doesn't work on Windows 7 x64...

 

[Ahnubus_29]

I just got on CAPS and that would be a 3/8 Tapered Cylinder Block Plug and its part # MD040338. Good luck with the build and I hope that is helpful.

 

[1997_GSX]

Thanks! Now what goes in this hole?

 

[MichaelSuch]

That looks like the hole where you stick a screw driver or something in to check and make sure that the lower balance shaft is where it needs to be when you are timing it. I think its a short 14mm bolt that plugs it. I used a little blue loctite paste on mine to help it prevent from leaking oil...

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Taken from here

 

[Ahnubus_29]

I just checked CAPS and it says that hole is plugged by a 10mm short block plug screw and its part # MD065945, I hope this helps.

 

[1997_GSX]

Thanks for all the help!!!

 

[Defiant]

You'll want a crush washer under that timing check plug.

 

[1997_GSX]

You'll want a crush washer under that timing check plug.

Thats exactly what I was thinking.

 

[blcknspo0ln]

I just got on CAPS and that would be a 3/8 Tapered Cylinder Block Plug and its part # MD040338. Good luck with the build and I hope that is helpful.

Also make sure to use thread sealant on that plug.