Head Bolts

[DRD57]

The head bolts for this 500 Caddy are pretty funky. They have some rust pitting and at 115 ft. lbs. I don't trust them.

I thought this would be a good excuse to step up to a set of ARP bolts but they don't list the sizes I need in their catalog. The local bolt store has U.S. made grade 8's in the correct sizes. Would they be good to use?

[paul2748]

The grade 8 should be ok.  I know Ford used grade five for their flatheads, and cheap Henry probably still uses them tody.

[EMSjunkie]

Are you sure those originals are'nt torque to yield bolts? they look like the SBC torque to yields. with that raised shoulder and all. if so, you would want to replace them anyway. I agree that grade 8's should be just fine.

just my opinion, and you know about opinions.


Vance

[DRD57]

Are you sure those originals are'nt torque to yield bolts? they look like the SBC torque to yields. with that raised shoulder and all. if so, you would want to replace them anyway. I agree that grade 8's should be just fine.

just my opinion, and you know about opinions.


Vance

None of the manuals that I've checked say anything about torque to yield.

My experience with torque to yield would indicate single use bolts. If that were the case, replacements would be available. None of the "real" local parts stores list anything for replacement head bolts for Cadillac engines.

[enjenjo]

If you call ARP with bolt sizes, they can usually come up with bolts that will work, even if they don't list a kit.

[river1]

have you tried posting this over at

http://www.cowboyseven.us/forum/   or

http://www.hwforums.com/2089/


seems like those fellas would know a source.

later jim[/url]

[58 Yeoman]

Go to www.500cid.com and look around.  Caddy's are his specialty.

phone 262-740-1118
email  mts@elknet.net

[DRD57]

Go to www.500cid.com and look around.  Caddy's are his specialty.

phone 262-740-1118
email  mts@elknet.net

I coughed up a pile of dead presidents for a set of Al's head bolts.

They're not purpose built head bolts but grade 9 bolts in the proper sizes.

I never heard of grade 9 before.

The grade 8's available locally would probably have been better than the stockers.

[Crosley.In.AZ]

grade 9 ?

interesting..... are they an Aussie manufactored item I wonder?

[Ohio Blue Tip]

Grade 9's are used in military applications quite a bit where extreme service is required.

[purplepickup]

We use grade 9 fasteners on fixtures in our test cells at work.  Grade 8 has 130,000 psi min yield strength and 150,000 tensile strength.  Grade 9 is 162,000 psi min yield & 180,000 psi tensile.  The L9 marking is from a Canadian company called Lamalloy.  I'm pretty sure they came up with the first ones.  I think the alloy has a little more Boron in it.  That's probably more than you care to know about grade 9. :?

[Carps]

grade 9 ?

interesting..... are they an Aussie manufactored item I wonder?

Could not possibly be Aussie stufff.

You only have to read what the Aussie have posted here to know that very few of them ever got past grade four.            

[Crosley.In.AZ]

grade 9 ?

interesting..... are they an Aussie manufactored item I wonder?

Could not possibly be Aussie stufff.

You only have to read what the Aussie have posted here to know that very few of them ever got past grade four.            

Now , that is funny!

[EMSjunkie]

LMAO  

Them fellars from down south sure are funny critters.
couple of 'em are even scary lookin.
just what are "stubbies" anyway?


Vance

[halfdone]

just what are "stubbies" anyway?

Like most words we have, it's got more than one meaning

A Stubbie of beer is a 375ml Bottle (as oposed to "long necks" which are 750ml). They of course come in packs of 24, and it's considered rude not too drink them all in one session!

Stubbies is also a brand of work shorts. Short work shorts. Hence the name.

It goes without saying that after you have drunk 24 stubbies of beer per session for a few decades you don't look good in stubbies anymore.....but that doesn't seem to stop us