Rocker shaft bolts

[Quick Turbo V6]

Looking for all 6 rocker shaft hold down bolts.

Thanks,
Scott

 

[dynoman]

I went to the hardware store and got 6 grade 8 bolts the proper length . I ran a bottoming tap in as far as it would go before reinstalling the shaft with HD supports . I had to do this because I found that the shaft bolts had only engaged a couple of threads and one of them pulled .

 

[1KWIKSIX]

Looking for all 6 rocker shaft hold down bolts.

Thanks,
Scott

Get a rocker shaft stud kit from TA Performance & never worry about it again!
Also 6 rocker shaft support braces

Rocker Shaft Bolt and Stud Kits, V6 Rocker Shaft Stud Kit, TA_V1323A | TAPerformance.com

 

[Reggie West]

Watch the length of the bolts used as well. Those holes have a depth of two inches, I used a 1 3/4 long bolt and chased the threads before putting them back on. You don't need a lot of torque on them. Torque spec is only 25 ft lbs. Don't go crazy with it.

 

[TurboWh1]

Are you using original rockers/shafts or new aftermarket roller rockers of some sort?

 

[Reggie West]

Harland Sharps this time around but same applies for stock or aftermarket.

 

[TurboWh1]

Harland Sharps this time around but same applies for stock or aftermarket.

One watch out and something I encountered on my Harland Sharps.... Check the contact pattern of the tip the roller on the valve. If it's not pretty much dead nuts center, it will beat the guides out of the cylinder head. I ended up making spacers to correct this issue.

Longer bolt compared to stock is definitely required

 

[Reggie West]

Yep did that too. Thanks!

 

[dynoman]

Longer bolt compared to stock is definitely required

I believe mine had stock bolts used , thus barely any thread engagement . I noticed the motor started to run weaker and valve train noise . When I went to check , the bolts were loose . upon retorquing , the back driver side did the "tighten then loose" pulling the top couple of threads out . I chased the threads , ran the bolt in as far as it would go and got bolts the correct length .

 

[jdpolzin]

I have a spare set.

 

[ShaunKris]

One watch out and something I encountered on my Harland Sharps.... Check the contact pattern of the tip the roller on the valve. If it's not pretty much dead nuts center, it will beat the guides out of the cylinder head. I ended up making spacers to correct this issue.

Longer bolt compared to stock is definitely required

Do you know the tread pitch and size of those longer bolts by chance?

 

[1KWIKSIX]

Get a rocker shaft stud kit from TA Performance & never worry about it again!
Also 6 rocker shaft support braces

Rocker Shaft Bolt and Stud Kits, V6 Rocker Shaft Stud Kit, TA_V1323A | TAPerformance.com

Here’s a pic of my top end : TA Perf. HD Rocker Shafts, Rocker Shaft Stud Kit & rocker shaft supports

 

[TurboWh1]

Do you know the tread pitch and size of those longer bolts by chance?

It's been a minute, I think they were 5/16-18. Can't recall the length. I match them up and checked the depth of the hole in the cylinder head