Correct Torque Method on Fulcrum (Rocker Arm) Bolts - Ranger-Forums - The Ultimate Ford Ranger Resource


2.9L & 3.0L V6 Tech General discussion of 2.9L and 3.0L V6 Ford Ranger engines.

Reply
 
LinkBack Thread Tools Search this Thread
  #1  
Old 07-27-2016
Member
Thread Starter
 
Join Date: Jul 2016
Location: BC Canada
Posts: 1,009
Correct Torque Method on Fulcrum (Rocker Arm) Bolts

Looked around on the site and found this, but it doesn't explain it very well and the Haynes manual is confusing.

https://www.ranger-forums.com/2-9l-3...m-bolts-86357/

It's supposed to be done in 2 stages, initially at 60 to 132 in-lbs and then at 18 to 26.

You start with the lifter at the lowest part of the cam.

So if one tightens the bolts to 60 to 132 in-lbs, why would you need to further go another 18 to 26.

Or does it mean to go to 18 to 26 when the valve is open ???
That doesn't make any sense though if it's already torqued to 60/132 ???

Thanks !
Reply With Quote
  #2  
Old 07-29-2016
Member
 
Join Date: Jul 2016
Location: Murfreesboro,TN
Posts: 37
http://visualbits.net/Car%20Stuff/Fo...L%20ENGINE.pdf

Tighten it down to where it seats. Then torque it to 18
Then go to 26

To get them to seat you can turn the engine over so the cam isn't pushing on the pushrod. Hence....loosening the spring to tighten it.
I didn't, I just tightened them all down at once. Fought the spring pressure. Wasn't a big deal at all.

I essentially used the bolt to compress the spring. Then torqued it
Reply With Quote
  #3  
Old 07-29-2016
Member
Thread Starter
 
Join Date: Jul 2016
Location: BC Canada
Posts: 1,009
Thanks !
Sounds like the manual has got it backwards...
The only other engine with hydraulic lifters that I worked on was an old Chev straight six and the procedure on that was very different.

If I remember correctly, one would initially tighten the rocker arm nut with the lifters at their lower point.
You then would start the engine and allow the lifters to fill with oil (lots of clatter).
After running for a bit, one would tighten down the rocker bolt and until it was quiet and give another half turn and lock it up.

There are videos on this, but on the Vulcan engine it sounds like you simply torque down the nut and that's it _ it must have something to tighten down on to then.

I guess it had to be this way because it's pretty much impossible to adjust the rockers while the engine is running.
Reply With Quote
  #4  
Old 07-29-2016
Member
 
Join Date: Jul 2016
Location: Murfreesboro,TN
Posts: 37
Yeah....just tighten down the bolts. No adjusting.
I didn't even move the cam. Maybe should have but I was sure it wouldn't matter and the bolt would make the rocker compress the spring with ease
Reply With Quote
  #5  
Old 07-29-2016
Member
Thread Starter
 
Join Date: Jul 2016
Location: BC Canada
Posts: 1,009
Quote:
Originally Posted by Glhx View Post
Yeah....just tighten down the bolts. No adjusting.
I didn't even move the cam. Maybe should have but I was sure it wouldn't matter and the bolt would make the rocker compress the spring with ease
One other question, does one pump up (fill with oil) the lifter(s) before installation ?

This procedure had to be done on the old Mazda B2200's because it would take a week for the thing to quiet down.
The lifters on the old B2200's were very problematic though.
Reply With Quote
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Rocker arm issue. Valve not opening correctly. Popping outta exhaust hard. mlw20lu 8-Cylinder Tech 7 01-16-2012 01:22 PM
MSD and Rocker Arm Brands Kris03 2.9L & 3.0L V6 Tech 1 11-21-2011 05:46 PM
Rocker arm bolts TexasEdge 2.9L & 3.0L V6 Tech 3 05-21-2009 10:55 AM
cheapest method of lowering? V3NOM Suspension Tech 22 06-18-2007 06:29 AM
New Method for applying Dri wash 'n guard ultra-ion dave01978 Auto Detailing 101 0 12-02-2004 01:59 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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

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



All times are GMT -6. The time now is 05:23 AM.