Olds rocker ?

greg fulk · 09-07-2009, 08:41 AM

Hey guys how or what do you drill the (i guess their steel) rocker arm fulcums with? My car has 3/8 studs & factory is 5/16....A regular bit just polishes it!!!!! HELP!!!!!

FED 387 · 09-07-2009, 08:43 AM

probably hafta use Titanium nitride coated OR Carbide bit--run it at low speed in a drill press and flood the drill tip with coolant---water-oil --cutting flluid

GLEN DEMENGE · 09-07-2009, 11:33 AM

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Quote:

Originally Posted by greg fulk

Hey guys how or what do you drill the (i guess their steel) rocker arm fulcums with? My car has 3/8 studs & factory is 5/16....A regular bit just polishes it!!!!! HELP!!!!!

greg fulk · 09-07-2009, 04:06 PM

I broke 1 @ Columbus Div race... I went & found an Alum. 1 from Judi Bureski's husband & we (dad & i ) drilled it out in the trailer... All the others I have are the steel ones & rockauto.com has them for $5.40 a pair so I got 3 pair just 2 be safe. I don't like having the steel ones on all cyl but one...mine is set up as adjustable with 3/8 studs & sb chevy push rods... I guess spinning one of these 307 6800 in the traps is a bit much?

Alan Warman · 09-07-2009, 04:36 PM

Greg
I had to use a reamer to take mine out to 3/8.Just use lots of coolant when reaming them out.

09-07-2009, 04:49 PM

Greg,
Set them up in a vertical mill and use a carbide end mill. The end mill is a bit expensive. But it will tear thru those rockers like they are butter.

Chris

Greg Reimer 7376 · 09-07-2009, 04:51 PM

Would an American Motors rocker arm bridge work here? I had one apart once( a 304 powered Jeep) and they looked real close. I don't remember the brand name part we used on the engine rebuild for the Jeep, or whether it was aluminum or hard steel.

greg fulk · 09-07-2009, 07:37 PM

Thanks Guys! Hope to have it flying for the Northern Sports Nationals!

Tom Goldman · 09-08-2009, 09:13 PM

Olds and AMC pivets will interchange. ......I use an end mill to take them out to .375"
[and LOTS of coolant]. ......Tom

09-07-2009, 08:41 AM	#1
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Olds rocker ? Hey guys how or what do you drill the (i guess their steel) rocker arm fulcums with? My car has 3/8 studs & factory is 5/16....A regular bit just polishes it!!!!! HELP!!!!! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

09-07-2009, 08:43 AM	#2
FED 387 VIP Member Join Date: Jun 2006 Posts: 3,416 Likes: 522 Liked 330 Times in 178 Posts	Re: Olds rocker ? probably hafta use Titanium nitride coated OR Carbide bit--run it at low speed in a drill press and flood the drill tip with coolant---water-oil --cutting flluid

09-07-2009, 04:06 PM	#4
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Olds rocker ? I broke 1 @ Columbus Div race... I went & found an Alum. 1 from Judi Bureski's husband & we (dad & i ) drilled it out in the trailer... All the others I have are the steel ones & rockauto.com has them for $5.40 a pair so I got 3 pair just 2 be safe. I don't like having the steel ones on all cyl but one...mine is set up as adjustable with 3/8 studs & sb chevy push rods... I guess spinning one of these 307 6800 in the traps is a bit much? __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

09-07-2009, 04:36 PM	#5
Alan Warman Member Join Date: May 2002 Location: San Angelo Tx Posts: 231 Likes: 0 Liked 0 Times in 0 Posts	Re: Olds rocker ? Greg I had to use a reamer to take mine out to 3/8.Just use lots of coolant when reaming them out. __________________ Alan Warman STK 4107

09-07-2009, 04:49 PM	#6
Chris Hardy Guest Posts: n/a	Re: Olds rocker ? Greg, Set them up in a vertical mill and use a carbide end mill. The end mill is a bit expensive. But it will tear thru those rockers like they are butter. Chris

09-07-2009, 04:51 PM	#7
Greg Reimer 7376 VIP Member Join Date: Nov 2008 Location: Glendora,Calif. Posts: 1,135 Likes: 172 Liked 704 Times in 218 Posts	Re: Olds rocker ? Would an American Motors rocker arm bridge work here? I had one apart once( a 304 powered Jeep) and they looked real close. I don't remember the brand name part we used on the engine rebuild for the Jeep, or whether it was aluminum or hard steel.

09-07-2009, 07:37 PM	#8
greg fulk VIP Member Join Date: Jan 2003 Location: jackson Posts: 1,165 Likes: 0 Liked 5 Times in 3 Posts	Re: Olds rocker ? Thanks Guys! Hope to have it flying for the Northern Sports Nationals! __________________ Greg Fulk 308 308X P/SA "ALL AMERICAN"

09-08-2009, 09:13 PM	#9
Tom Goldman VIP Member Join Date: Jan 2003 Location: Allentown,PA Posts: 2,474 Likes: 885 Liked 859 Times in 234 Posts	Re: Olds rocker ? Olds and AMC pivets will interchange. ......I use an end mill to take them out to .375" [and LOTS of coolant]. ......Tom __________________ Tom Goldman 1500 SG , 1506 STK