Oil Galley Plug Locations......double check
Turbo Mini Forums

I just got my 1098 block back from the machinist and he gave me a little bag with two 0.5" plugs and three ~0.125" plugs (all had holes drilled in them to get them out). The two .5" plugs I know go on the sides of the engine...in the large main oil galley. However, I want to triple check/confirm the location of the small plugs...before I mess it up.

I believe 2 small plugs go here:

The third small plug I am thinking may not be a plug, but rather the metering orifice that goes in the center main bearing oil passage to limit oil to the center cam bearing:


Please let me know if I am missing any plugs....

Also, what is the general opinion on threading these holes (just the plugs not the orifice) vs the brass plugs....

BTW...the washers under the center main bearing bolts will be going away at final assembly....the bolts were slightly too long.

Thanks, Mike

hi mike now, thats a clean block to say the least infact the best i have ever seen!
you are correct on the plugs
on the top picture i use 1/8 BSP there
the side plugs 4 off ....
for the main gallery i used to go to 3/8" BSP
but i found that 1/4" BSP is fine although the hole size with removing the plug is 0.010" over size for the tap but its not high pressure and some sealent on the plugs work fine!

the centre main iam not sure about .... any pics of the plugs you have been given ??

drilling these Centre mains and fitting you own plugs is not a problem providing the hex plugs are not too! large .... 1/8" BSP MAX!!! and the right size orafice drilled through them for the oil feed

having said that if you have been give the right plugs use them!
awaiting your pics of the plugs :)

regards steve

Edited by BENROSS on 25th Mar, 2008.