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What is this hole in my block for?

  • Thread starter Thread starter 68EFIvert
  • Start date Start date Mar 7, 2008
6

68EFIvert

Member
Jan 13, 2007
639
0
17
Camas, Washington
Mar 7, 2008
#1
  • Mar 7, 2008
  • #1
I am tracking down a coolant leak on my engine and have a basic question. I recently added a blower and AFR heads to my 5.0 block. I noticed that there is a fairly significant fluid leak coming from the back of the block. The tuner thought it was hoses but it is not. I think it may be my MLS head gaskets are not sealing properly.

I have one thing I wanted to confrim before I rip the engine apart and put on normal head gaskets. There is a hole that is threaded located on the back of the block that is just behind the intake manifold. I noticed it is threaded but does not have a plug in it. By chance is this a port for the water temp gauge or something that is tied into the cooling system?
 

BlownFiveLiter

have car, will race....wait, it doesn't run
15 Year Member
Nov 29, 1999
3,133
18
108
Chicagoland
Mar 7, 2008
#2
  • Mar 7, 2008
  • #2
It's a blind hole. Not sure what its purpose may have been when the blocks were designed, but it doesn't come into contact with any oil, or a water jacket.
 
6

68EFIvert

Member
Jan 13, 2007
639
0
17
Camas, Washington
Mar 7, 2008
#3
  • Mar 7, 2008
  • #3
Thanks for the help.
 
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