1986 300 6 pushrods. Help!
03-25-2014, 11:34 PM
#1
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1986 300 6 pushrods. Help!
I recently picked up my second ford truck, an 86 F-150 4x4 with a carburated 300 straight six and a 3speed with O/D.
The truck has sat for 13 years on a farm, I got it towed back to my place where we changed the starter, ignition coil and a few other things, and got it fired up to find a few sticky valves.
We pulled the valve cover off and got them unstuck, but found two bent pushrods that had popped out of the rockers. We got the valves unstuck, Straightened the pushrods as a temporary fix to get it to my mechanics garage where we'd do the rest of the work.
3 days later, in the cold canadian weather it wouldn't start, we pulled the valve cover off again and found three intake valves stuck, and one more pushrod(a different one than before) had popped out and bent.
We got it running enough to pull into the garage, then went to get some new pushrods.
I got the OE pushrods, but when we got back, we realised that they are about 60 thou shorter than the ones in my motor.
I called the parts store, they said they could order in some smaller ones, but they couldn't get any longer pushrods.
What's going on? Is there anywhere to get longer pushrods? I've looked, but can't find any information at all about this.
Hopefully you guys can shed some light on this.
Thanks!
The truck has sat for 13 years on a farm, I got it towed back to my place where we changed the starter, ignition coil and a few other things, and got it fired up to find a few sticky valves.
We pulled the valve cover off and got them unstuck, but found two bent pushrods that had popped out of the rockers. We got the valves unstuck, Straightened the pushrods as a temporary fix to get it to my mechanics garage where we'd do the rest of the work.
3 days later, in the cold canadian weather it wouldn't start, we pulled the valve cover off again and found three intake valves stuck, and one more pushrod(a different one than before) had popped out and bent.
We got it running enough to pull into the garage, then went to get some new pushrods.
I got the OE pushrods, but when we got back, we realised that they are about 60 thou shorter than the ones in my motor.
I called the parts store, they said they could order in some smaller ones, but they couldn't get any longer pushrods.
What's going on? Is there anywhere to get longer pushrods? I've looked, but can't find any information at all about this.
Hopefully you guys can shed some light on this.
Thanks!
03-25-2014, 11:51 PM
#2
Senior Member
It's possible that somebody throughout the years put in different pushrods than what came in the engine. Might be why they are bending. You can look online at factory specs to make sure on the length of the pushrods. That should clear up some of the confusion.
03-26-2014, 01:44 AM
#4
Senior Member
http://www.akfiles.com/forums/showthread.php?t=58111
https://www.rockauto.com/catalog/x,c...%2B300cid%2BL6
This was with just a few minutes of Google. The first one explains a little bit about the differences and gives the torques. The second one shows 2 different lengths of pushrods. Are the pushrods you currently have either one of those lengths? If so it should be the correct one. I would verify that it doesn't have hydraulic lifters, but from what little i've read it shouldn't being an 86. If it does have hydraulic lifters, remove them and clean them in solvent. Make sure to soak them in oil before you reinstall them.
https://www.rockauto.com/catalog/x,c...%2B300cid%2BL6
This was with just a few minutes of Google. The first one explains a little bit about the differences and gives the torques. The second one shows 2 different lengths of pushrods. Are the pushrods you currently have either one of those lengths? If so it should be the correct one. I would verify that it doesn't have hydraulic lifters, but from what little i've read it shouldn't being an 86. If it does have hydraulic lifters, remove them and clean them in solvent. Make sure to soak them in oil before you reinstall them.