Cadillac Owners Forum banner

1 - 8 of 8 Posts

·
Registered
99 Cadillac STS
Joined
·
51 Posts
Discussion Starter #1
Hey Guys,

can anyone tell me what size torx is needed for the head bolts on a Northstar ? I can't remember.
 

·
Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
·
87,118 Posts
Head bolts are not held on with Torx head bolts. They use regular hex heads, though I don't know what size they are.
 

·
Registered
2001 eldorado,2008 DTS,2005 XLR, '96 eldo,'95 eldo,' 89 eldo,'78 eldo,'11CTS-V
Joined
·
1,818 Posts
I think Ranger means hex as in ALLEN hex, not Torx. It's 10mm.
 

·
Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
·
69,504 Posts
Torx is one thing, Allen is another, and the Northstar standard hex head Grade 8 bolts are another.

The cylinder heads use 2 M6 and 8 M11 bolts.
 

·
Registered
2001 eldorado,2008 DTS,2005 XLR, '96 eldo,'95 eldo,' 89 eldo,'78 eldo,'11CTS-V
Joined
·
1,818 Posts
Every Northstar I've worked on had round-headed headbolts (ten /head), and an Allen keyed hole in the bolthead that took a male hex (10mm)tool to remove. I think that's what the origional poster was looking for; the tool size to remove the bolt. The thread size is M11.
 

·
Administrator
2002.5 F55 CORSA STS, 2014 Explorer XLT FWD
Joined
·
69,504 Posts
OK..........Earth to James.......The 3 M6's are hex head, the 10 M11's are internal drive.
 

·
Super Moderator
White Diamond '03 DHS (with DTS floor shift)
Joined
·
87,118 Posts
Now I'm thoroughly confused. Guess I should go out and check the FSM, but I was in the garage all day working on my wife's compressor clutch and am just to bruised, bloodied and battered to get up. I'll just stand corrected.
 

·
Registered
99 Cadillac STS
Joined
·
51 Posts
Discussion Starter #8
Hey thanks for the replies, I've confirmed calling a local cadillac service department it's a 10mm Allen


Thanks

-Rob
 
1 - 8 of 8 Posts
Top