Question on Northstar small cover bolts, what size wrench?
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Northstar Engines and System Technical Discussion Discussion, Question on Northstar small cover bolts, what size wrench? in Cadillac Engine Discussion; This is probably a stupid question, but I am the new owner of an 04 V-8 SRX. I was tinkering ...
  1. #1
    st_pinetree's Avatar
    st_pinetree is offline Cadillac Owners Fanatic
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    Question on Northstar small cover bolts, what size wrench?

    This is probably a stupid question, but I am the new owner of an 04 V-8 SRX. I was tinkering a little over the weekend, and noticed a tiny leakage of coolant, possibly coming from one of the front covers near the water pump. I was checking the cover bolts and they seem to be 10mm, but my 12 point sockets (Craftsman) were kind of loose and I was afraid I'd strip the head if I applied the proper torque. No SAE sizes were closer. I guess maybe I need to get some six point 10mm sockets for this application. Has anyone else run into this?


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    jimsbox is offline Cadillac Owners Enthusiast
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    Re: Question on Northstar small cover bolts, what size wrench?

    I try to never use a 12 point socket and indeed have bought only 6 pt sockets for the last several years. The Northstar is a metric engine and although I don't know exactly which bolts you are talking about, I do know that a 10mm, 13mm and 15 mm will handle almost anything on the outside of the engine. My guess is a 6pt 10mm and you will be ok. I am sure it is not an SAE size fastener. My Northstars have all been front wheel drive so that is the best I can offer you.

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    st_pinetree's Avatar
    st_pinetree is offline Cadillac Owners Fanatic
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    Re: Question on Northstar small cover bolts, what size wrench?

    Thanks for the quick reply. I'll give them a go with a 6 pt and see what happens. I have lost all of my 6 pt 10mm's. Guess I should replace them anyway.

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    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
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    Re: Question on Northstar small cover bolts, what size wrench?

    I just threw away all my 12 points and replaced them with 6 points. Got tired of rounding bolt heads.

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