How would you set rocker arms? - Ford Mustang Forum
 
LinkBack Thread Tools
post #1 of 9 (permalink) Old 08-12-2008 Thread Starter
Apprentice
 
wheelliftin351's Avatar
 
Joined: May 2007
Location: Saskatoon
Posts: 82
 
Send a message via MSN to wheelliftin351
How would you set rocker arms?

On a stock 351 with a stock hyd cam, how would you set your rockers arms cold without the engine running. Is there a pattern to turn the crank 1/4 turn at a time to set 2 rockers on each 1/4 turn? Such as you would with a Flat Tappet Cam.

1990 LX Coupe, 357W Sleeper.

wheelliftin351 is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 08-12-2008
RLG34750
Guest
 
RLG34750's Avatar
 
Posts: n/a
Quote:
Originally Posted by wheelliftin351 View Post
On a stock 351 with a stock hyd cam, how would you set your rockers arms cold without the engine running. Is there a pattern to turn the crank 1/4 turn at a time to set 2 rockers on each 1/4 turn? Such as you would with a Flat Tappet Cam.

this should help you.....

1. Remove the valve covers, and pick a cylinder you are going to set the pre-load on. Only do one cylinder at a time.

2. Rotate the engine in its normal direction of rotation (clockwise) and watch the exhaust valve on that particular cylinder. When the exhaust valve begins to open, stop and adjust that cylinder's intake rocker arm.

3. To adjust, back off the intake rocker arm adjusting nut and remove any tension from the push rod. Wait a minute or two for that hydraulic lifter to return to a neutral position. The spring inside the lifter will move the push rod seat up against the retaining lock, if you give it time to do so.

4. Twist the intake push rod with your fingers while tightening down the rocker arm. When you feel a slight resistance to the turning of the push rod, you are at "Zero Lash". Turn the adjusting nut down one half to three-quarters of a turn from that point for street applications. Use 1/8 to 1/4 turn for race applications. Lock the adjuster into position. The intake is now adjusted properly.

5. Continue to turn the engine, watching that same intake valve/rocker you just set. It will go to full open and then begin to close. When it is almost closed, stop and adjust the exhaust rocker arm on that particular cylinder. Loosen the exhaust rocker arm and follow the same procedure described before in steps 3 and 4 to adjust this rocker arm.

6. Both valves on this cylinder are now adjusted, and you can move on to your next cylinder and follow the same procedure again.

There may be some initial valvetrain noise when the engine is first fired up but once oil pressure has stabilized and the engine heats up, it should quiet right down to a normal level.
post #3 of 9 (permalink) Old 08-12-2008 Thread Starter
Apprentice
 
wheelliftin351's Avatar
 
Joined: May 2007
Location: Saskatoon
Posts: 82
 
Send a message via MSN to wheelliftin351
Thanks alot!!!!!!!

1990 LX Coupe, 357W Sleeper.

wheelliftin351 is offline  
post #4 of 9 (permalink) Old 08-13-2008
SHELBY GT-40 ULTIMATE Member
4.6L Member
5.0L Member
 
EagleAutosports's Avatar
 
Joined: Feb 2007
Location: Graham
Posts: 51,297
               
That should get things right.

Best Car & Motorcycle Insurance | Auto/Moto Protection Today | FREE Trade-In Quote

AFM Site Administrator
Member: Mustang Club of America #82740, White Mustang Registry #362, NMRA, Fun Ford Weekend, Mustangs of Burlington

MOOG Certified Technician
For mods and sound clips, see profile and gallery.

EagleAutosports is offline  
post #5 of 9 (permalink) Old 09-28-2008
PONY Member
Classic Member
 
bubbamace's Avatar
 
Joined: Oct 2007
Location: Long Beach
Posts: 470
 
Garage
Hey guys, Will this work on a 302 (5.0 bored and stroked to 347) also? I think it will, but just want to make sure. Thanks.
bubbamace is offline  
post #6 of 9 (permalink) Old 09-29-2008
RLG34750
Guest
 
RLG34750's Avatar
 
Posts: n/a
Quote:
Originally Posted by bubbamace View Post
Hey guys, Will this work on a 302 (5.0 bored and stroked to 347) also? I think it will, but just want to make sure. Thanks.
most certainly will......
post #7 of 9 (permalink) Old 09-29-2008
PONY Member
Classic Member
 
bubbamace's Avatar
 
Joined: Oct 2007
Location: Long Beach
Posts: 470
 
Garage
Thanks rlg34750. I appreciate the input. I was looking for a way to adjust the valve lash while the engine was running, like on a chevy, but no one has done this. Sooooo, I'll try it this way. Thanks again.

Bubba
bubbamace is offline  
post #8 of 9 (permalink) Old 09-29-2008
SHELBY GT-40 ULTIMATE Member
4.6L Member
5.0L Member
 
EagleAutosports's Avatar
 
Joined: Feb 2007
Location: Graham
Posts: 51,297
               
That would work on the 302/347. Wish we could set it like you set the valves on a Chevy but since it's a Ford, we have to be different.

Best Car & Motorcycle Insurance | Auto/Moto Protection Today | FREE Trade-In Quote

AFM Site Administrator
Member: Mustang Club of America #82740, White Mustang Registry #362, NMRA, Fun Ford Weekend, Mustangs of Burlington

MOOG Certified Technician
For mods and sound clips, see profile and gallery.

EagleAutosports is offline  
post #9 of 9 (permalink) Old 09-29-2008
PONY Member
Classic Member
 
bubbamace's Avatar
 
Joined: Oct 2007
Location: Long Beach
Posts: 470
 
Garage
The Ford is a different animal. I wish they were as easy as a chevy to work on. I can't believe how many times I've had this new engine apart. Its becoming an old friend fast Ha Ha. Well got to go back out in the garage and adjust these valves again. I keep having these aftermarket locks become lose and throwing off the valve lash. I hate to crank on things, but I'm going to crank on these locks so I don't have to take off the valve covers again ( for awhile anyway). I should have bought a mechanical cam because I've been in there so many times already. Oh well, enough gripping and back to it. Thanks a lot for the info.

Bubba
bubbamace is offline  
Sponsored Links
Advertisement
 
Closed Thread

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Ford Mustang Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a VALID email address for yourself, otherwise you will not receive the necessary confirmation email needed to confirm, validate and activate your new AFM member account.

Failure to provide a VALID email address, will result in the cancellation of your new AFM member account registration.

Email Address:
OR

Log-in









Random Question

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is Off
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome


1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183