What goes in these holes?
10-12-2009, 08:14 AM
#2
I can't remember for sure but as you start assembling the motor it will make sense what goes where. I believe at least one of those bolt holes [maybe #1?] will be the bracket for the AC compressor. Two bolts into the compressor, one bolt into the block.
Judging by this pic of my engine semi-assembled, I don't think anything goes into #2 or #3.
Judging by this pic of my engine semi-assembled, I don't think anything goes into #2 or #3.
10-12-2009, 08:39 AM
#3
well you were looking at it backwards. First off depending on the year of your car #3 is for the oil pressure sensor unless yours is behind the intake manifold. If it is then #2 & #3 are both plugged. #3 can be used for i.e. a mechanical oil pressure sensor. As far as #1 goes someone else will have to chime in. But i think it goes to the furthest bolt on the motor mount.
10-12-2009, 08:50 AM
#4
well you were looking at it backwards. First off depending on the year of your car #3 is for the oil pressure sensor unless yours is behind the intake manifold. If it is then #2 & #3 are both plugged. #3 can be used for i.e. a mechanical oil pressure sensor. As far as #1 goes someone else will have to chime in. But i think it goes to the furthest bolt on the motor mount.
Like litch2004 said, #3 would be the oil pressure sensor if it wasn't mounted to the back of your intake manifold. If you are not using #3, you need to plug it. #2 is unused and is OK to leave alone - you can see #2 in the pic below.
From Shbox.com:
Trying to find a pic of my motor mount but I do believe litch2004 was correct that #1 is used by the motor mount.
Last edited by meissenation; 10-12-2009 at 09:01 AM.
10-12-2009, 09:09 AM
#8
With all the pictures I have in my web gallery of my LT1 build and what not, I can't find one good picture of the driver's side of the block. 
http://meissenation.com/projectlt1/
http://meissenation.com/projectlt1/
10-12-2009, 10:19 AM
#9
Numbers 1 and 2 are for a manual clutch linkage which would be used if the motor was mated to an older transmission. Number 3 is an oil galley and should have a plug in it unless your car is a 93. In that case the oil pressure sending unit goes there.
10-12-2009, 02:06 PM
#11
TECH Veteran
10-12-2009, 05:58 PM
#12
I'm not sure what 1 is but 2 is the hole where a mechanical clutch pivot ball would screw into the block and 3 leads to an oil passage so you can block it or use it for an oil pressure gauge or other pressurized oil feed port.
