300 Inline 6 Rocker studs.
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5th Wheeling
Joined: Jul 2016
Posts: 33
Likes: 1
From: Eastern MT
300 Inline 6 Rocker studs.
The truck is a 1983 F250 2wd with a 300 Inline six, that I recently bought and have had a fair amount of problems stemming to ham handed mechanics at the previous shop (it was a county rig). So I sheared the teeth of the fiber cam gear and decided to pull the motor and reseal the greasy beast, and in the process of replacing valve stem seals. I noticed the rocker arm studs are completely worn down, my guess from over torqueing, and are 100% needing to be replaced. This is not a performance rig, just a Daily Driver for me, so I want to do it right but keep the cost low. Ive never messed with rockers much and am almost clueless about non adjustable rockers, and backlash etc.
What can I replace the studs with? (they are pressed in)
What can I replace the rockers with? do they need to be replaced?
The fulcrum washers?? are suspect and most likely shot too, what can I replace them with?
What is my cost likely to be for a machinist to do the work? (the head is out and cleaned!)
What can I replace the studs with? (they are pressed in)
What can I replace the rockers with? do they need to be replaced?
The fulcrum washers?? are suspect and most likely shot too, what can I replace them with?
What is my cost likely to be for a machinist to do the work? (the head is out and cleaned!)
Moderator
Joined: Jan 2001
Posts: 56,980
Likes: 2,735
From: Virginia
What can I replace the studs with? (they are pressed in)
What can I replace the rockers with? do they need to be replaced?
The fulcrum washers?? are suspect and most likely shot too, what can I replace them with?
What is my cost likely to be for a machinist to do the work? (the head is out and cleaned!)
Thread Starter
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5th Wheeling
Joined: Jul 2016
Posts: 33
Likes: 1
From: Eastern MT
Thanks Dave!
Couple quick questions:
I could not find new press in studs, are they still available say online?
I like the idea of threaded studs, how do I find a set that are the right height to reuse the old rockers?
What are my options for new rockers, if I opt for the threaded studs?
I know a lot of chevy guys are using a kit from comp cams to pull and thread the studs in themselves, is this doable if a short enough stud can be found?
I'm a geologist and a rancher on the side, or by moonlight to be more accurate, not a machinist or mechanic.
Couple quick questions:
I could not find new press in studs, are they still available say online?
I like the idea of threaded studs, how do I find a set that are the right height to reuse the old rockers?
What are my options for new rockers, if I opt for the threaded studs?
I know a lot of chevy guys are using a kit from comp cams to pull and thread the studs in themselves, is this doable if a short enough stud can be found?
I'm a geologist and a rancher on the side, or by moonlight to be more accurate, not a machinist or mechanic.
Moderator
Joined: Jan 2001
Posts: 56,980
Likes: 2,735
From: Virginia
Your best bet is to find the machinist you like and that can help you. They can get the parts, and have the experience to help you get it going again. They have their preferences on what to use because they will guarantee their work. If you get hem hawing and the run around, then you know to move on and find someone else. They will want to look at the head and all your parts, and they can determine right away what it's going to need to make it last. I am assuming the least you are going to want to do is get the valves reground. So if you take it to them for that, they will have an opinion on the rest of it also.
More Turbo
Joined: Oct 2020
Posts: 529
Likes: 54
From: Houston
I had two press in studs redone. Here in Houston I paid about 90 bucks supplying the studs. I could have gone the screw ins route, but I am not hard on the old gal, so I minimized my final cost. I think I have a couple NOS left over (it was a pack of four). The weren't much , so if you need them, I'll let them go for shipping and a six of Lone Star.
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