setting valves one sbf with old 351w heads

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?

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

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.

ok..who is correct ?

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...

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

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.

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

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.

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 !

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..

take up the slack and add 1/2 turn.

there is threads..then studs gets slightly bigger

johndickjr wrote:there is threads..then studs gets slightly bigger

Positive stop shoulder.

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.

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.

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

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

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.

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.