setting valves one sbf with old 351w heads

Go down

setting valves one sbf with old 351w heads

Post  johndickjr on November 2nd 2013, 8:24 pm

i have always had fully adjustable valve-train on my motors , im working on a 351w with some dooe heads with factory rockers and pressed in studs, what is the procedure to set hydraulic lifters? same as normal ? or just run them down?

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  Nastynotch on November 2nd 2013, 8:29 pm

same as normal, get to zero lash and then go another 1/2 to 3/4 turn. Should still have the rail tip rockers.

Nastynotch

Posts : 28
Join date : 2012-09-28

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  whitefield on November 2nd 2013, 10:53 pm

They just run down and you torque them 18 to 22 foot lbs . They are called posi stop rocker arms they have a shoulder on the stud.Make sure that you do this with the piston on top dead center of the compression stroke and both valves should be closed at this time. This is provided you have the factory press in stud and cast iron rocker arms.
avatar
whitefield

Posts : 2216
Join date : 2009-08-23
Age : 50

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  johndickjr on November 3rd 2013, 10:14 am

ok..who is correct ?

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  the Coug on November 3rd 2013, 11:02 am

70 model 351 heads do not have positive lock rockers or none of the sets I have had never had them.... you have to set them by feel...
avatar
the Coug

Posts : 3055
Join date : 2008-12-02

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  richter69 on November 3rd 2013, 11:13 am

take a rocker off and look at the stud to see if it has the shoulder
avatar
richter69

Posts : 13645
Join date : 2008-12-02
Age : 47
Location : In the winners circle

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  69F100 on November 3rd 2013, 11:39 am

Nastynotch wrote:same as normal, get to zero lash and then go another 1/2 to 3/4 turn.  Should still have the rail tip rockers.  
I do mine the same Nastynocth been running it for many years it a early 351w dooe heads it does not have the positive lock but if you running a very high lift over 550 be careful and watch the studs they will pull out.
avatar
69F100
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 5148
Join date : 2009-01-04
Age : 51
Location : Irwinville Ga.

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  johndickjr on November 3rd 2013, 11:41 am

69F100 wrote:
Nastynotch wrote:same as normal, get to zero lash and then go another 1/2 to 3/4 turn.  Should still have the rail tip rockers.  
I do mine the same  Nastynocth been running it for many years it a early 351w dooe heads it does not have the positive lock but if you running a very high lift over 550 be careful and watch the studs they will pull out.
cam is stock 1994 mustang cam

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  whitefield on November 3rd 2013, 12:20 pm

1969 to 76 302 and 351w have positive stop step shoulder press in studs. If they are adjustable then the stud has been changed to a standard 289 to 68 302 type stud. I have had more 351w than the average person from cars trucks boat ect. and none have had the adjustable valve train from the factory.

I have double checked the Peterson repair manual and it is even in the Ford racing performance parts catalogue .

If all else fails check the stud and see if it has a shoulder ! Also check the rocker arm and see if it has the sides on it that keeps the rocker arm aligned over or on the valve stem.
avatar
whitefield

Posts : 2216
Join date : 2009-08-23
Age : 50

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  whitefield on November 3rd 2013, 12:24 pm

the Coug wrote:70 model 351 heads do not have positive lock rockers or none of the sets I have had never had them.... you have to set them by feel...
Positive stop not positive lock !
avatar
whitefield

Posts : 2216
Join date : 2009-08-23
Age : 50

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  johndickjr on November 3rd 2013, 12:26 pm

whitefield wrote:1969 to 76 302 and 351w have positive stop step shoulder press in studs. If they are adjustable then the stud has been changed to a standard 289 to 68 302 type stud. I have had more 351w than the average  person from cars trucks boat ect. and none have had the adjustable valve train from the factory.

I have double checked the Peterson repair manual and it is even in the Ford racing performance parts catalogue .

 If all else fails check the stud and see if it has a shoulder ! Also check the rocker arm and see if it has the sides on it that keeps the rocker arm aligned over or on the valve stem.
they have rails on the rockers..

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  dfree383 on November 3rd 2013, 12:36 pm

take up the slack and add 1/2 turn.
avatar
dfree383
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 14160
Join date : 2009-07-09
Location : Home Wif Da Wife.....

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  johndickjr on November 3rd 2013, 12:58 pm

there is threads..then studs gets slightly bigger

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  maverick on November 3rd 2013, 1:28 pm

johndickjr wrote:there is threads..then studs gets slightly bigger
Positive stop shoulder.
avatar
maverick
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 3052
Join date : 2009-08-06
Age : 66

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  richter69 on November 3rd 2013, 1:47 pm

there would need to be a squared off edge for positive stop


take the rocker off and slide the pivot down over the stud, if it falls all the way down its not posituve stop.

it aint that hard to figure out.
avatar
richter69

Posts : 13645
Join date : 2008-12-02
Age : 47
Location : In the winners circle

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  IDT-572 on November 3rd 2013, 3:15 pm

If your turning this deal any rpm you need to set your preload to 1\8th to 1\4 turn not 3\4 to 1 turns. The lighter the preload the greater the rpm capability.   The heads your talking about can be adjustable by adding a 1\8 th thick washer that will slide over the stud and a lock nut.  But they are non adjustable as sent from the factory.  People may get them confused with earlier that had bolts you torque down.
avatar
IDT-572
BBF CONTRIBUTOR
BBF CONTRIBUTOR

Posts : 4604
Join date : 2008-12-02
Age : 57
Location : Shelbyville Tn.

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  johndickjr on November 3rd 2013, 3:31 pm

richter69 wrote:there would need to be a squared off edge for positive stop


take the rocker off and slide the pivot down over the stud, if it falls all the way down its not posituve stop.

it aint that hard to figure out.
ball falls all way over stud

johndickjr

Posts : 881
Join date : 2009-08-06
Location : northeast oklahoma

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  whitefield on November 3rd 2013, 4:39 pm

sounds like the studs have been changed . Here is a link to ford tech tips  go to the engine building tech tips section . good luck and I hope this helps
http://www.fordracingparts.com/Download/EngineTips.asp
avatar
whitefield

Posts : 2216
Join date : 2009-08-23
Age : 50

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  Nastynotch on November 3rd 2013, 7:27 pm

johndickjr wrote:cam is stock 1994 mustang cam
You're going to have to check what press in studs you have I guess, never ran into this problem myself. Are you putting these heads on a newer "roller cam" windsor block? If so, why? I'm pretty sure the dooe heads won't have the valve seats needed for unleaded fuel.

Nastynotch

Posts : 28
Join date : 2012-09-28

View user profile

Back to top Go down

Re: setting valves one sbf with old 351w heads

Post  LivermoreDave on November 5th 2013, 9:16 am

I may be mistaken and correct me if I am, the rocker arm adjusting NUT will decide if you have adjustability, not the stud. Ford D0OE 351W cylinder heads from the factory have a positive stop shouldered rocker stud that uses a non-locking type nut that torques in the 15' lb. to 25' lb. range.

Dave.

LivermoreDave

Posts : 972
Join date : 2009-09-27
Location : North of the Equator.

View user profile

Back to top Go down

Back to top


 
Permissions in this forum:
You cannot reply to topics in this forum