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-   -   1985 f250 6.9 rocker arms (https://www.ford-trucks.com/forums/945651-1985-f250-6-9-rocker-arms.html)

1985 Nelson 04-03-2010 10:33 PM

1985 f250 6.9 rocker arms
 
what are the best rocker arms to use in my motor. i am doing a little tuneup since i have to replace my oil pressure sending unit.

Dave Sponaugle 04-03-2010 11:01 PM

7.3 style rockers are much stronger, direct bolt on swap.

kenpobuck 04-03-2010 11:05 PM

Dave, what is the difference between the two styles? I have yet to have the chance to open up a 7.3 and was wondering.

Dave Sponaugle 04-03-2010 11:23 PM

83 thru 86 6.9 rockers

Picture from DPS Performance.

http://www.dps-performance.com/image...s/DSCF0027.JPG

Pivot point after 300 miles, notice the wear.

http://www.dps-performance.com/image...s/DSCF0031.JPG

From the bottom, round means the rockers can shift around in a circle.

http://www.dps-performance.com/image...s/DSCF0036.JPG



87 6.9 and 88 thru 94 7.3 style rockers

http://www.dps-performance.com/image...s/DSCF0033.JPG

Square means no circles.

http://www.dps-performance.com/image...s/DSCF0037.JPG

Rockers that go in circles make push rods that look like this, pictures from my collection now.

https://www.ford-trucks.com/user_gal...id=115512&.jpg

And that makes pistons sit like this.

https://www.ford-trucks.com/user_gal...id=190136&.jpg

With the block being destroyed in the process since it cracked when the valve made contact with the piston and broke the piston.

kenpobuck 04-03-2010 11:30 PM

O.K. I see now. I am still looking for a set of 7.3 rockers myself. I have a buddy in Petersburg ky with a 93 F250 4x4 that runs it real hard and does little to no maintance on it. It also has the zf5 in it. I told him that when he blows it up i want first dibs on the truck lol. It also has a chuffing valve in it for the last 3 years and is still chugging along. i wonder if I will ever get a chance at that thing lol.

Dave Sponaugle 04-03-2010 11:40 PM

You may be waiting for a while yet.

I priced them for someone a while back, and if I remember right they were not that expensive.

Let me think a while, I may be able to remember where I priced them at.
Probably have a link on my dead hard drive.

starmilt 04-04-2010 12:32 AM

someone mentioned getting a set for 96 bucks not to long ago. I forget which store it was, but I thought it was cheap.

mabc926 04-04-2010 01:01 AM

Quote:

Originally Posted by kenpobuck (Post 8724115)
I am still looking for a set of 7.3 rockers myself.

I have an extra set of 7.3 rocker arms....once I get my engine put together and see I don't need them I'd be willing you sell you them for the price I bought them to help you out.

1985 Nelson 04-04-2010 04:05 AM

would you suggest me changing the pushrods also?

Dave Sponaugle 04-04-2010 12:18 PM

If the push rods are straight and within spec for length, there is no reason, they are the same push rod.

kenpobuck 04-04-2010 06:14 PM

mabc926, That would be great. Shoot me a pm about it.

queen of spades 11-10-2013 04:02 PM

Who sells the 7.3 style rocker arms? Checked Napa and they have the same part listed for 6.9 and 7.3, which is the 6.9 style.


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