All Small Six Help! Did I just screw up my new build?
- Thread starter WillingnessLimp
- Start date
This relates to all small sixes
There is oiling for the pushrod on adj. rockers, it comes out of the rocker at the adjustment screw/ball and flows down the screw/ball to the pushrod cup, over and down the push rod. No issue for hyd. lifters.
Jmustang_65
Famous Member
https://mewagner.com/ is the one that's been used on this site.
WillingnessLimp
Well-known member
I'm using that one you linked from Summit: ACDelco Gold PCV Valves 19310788. It seems to work as well as the ancient one that was on mine originally. My old one was probably fine and rattled when I shook it but for less than $5 I thought it would be silly not to put it on the new engine. I've tried it with both and there is no noticeable difference.
For the sake of interest, as a test, I might put a breather on my catch can block the vacuum port on the log to see if there is any difference in how it idles and runs. It'll have to wait for some nicer weather around here though. Probably a few more weeks.
. Amazon says it fits the I6 but doesn’t fit the 390. It’s not a generic one
WillingnessLimp
Well-known member
I’m still in limbo with my engine: trying to figure out carb situation and what to do with the rocker arm.
In the meantime I picked up an adjustable rocker arm assembly and going to clean and rebuild it with tips from Falcon Performance handbook.
I guess I got couple questions for you guys:
1. Why do people get a used adjustable rocker arm assembly? I was searching for some replacement parts and you pretty much can just assemble the rocker arm with NOS parts… even for a rebuild from rocker arms unlimited it’s about $350. Getting all new parts will possibly be cheaper? That’s just a side note.
2. I noticed that the assembly I picked up doesn’t have a stand with flow for extra oil, like I had on mine. How necessary is that? Should I just swap out one from mine or keep it as it is?
3. Push rods. Some of the ones I picked up are slightly bent, so I’m thinking of a new set (or just replace the ones that bent). RockAuto gives me 2 options:
- SBI 1901280 (8 inches long)
- Melling MPR 81 (7.85 inches long)
Any suggestions on these ones?
Thanks, Tim
In the meantime I picked up an adjustable rocker arm assembly and going to clean and rebuild it with tips from Falcon Performance handbook.
I guess I got couple questions for you guys:
1. Why do people get a used adjustable rocker arm assembly? I was searching for some replacement parts and you pretty much can just assemble the rocker arm with NOS parts… even for a rebuild from rocker arms unlimited it’s about $350. Getting all new parts will possibly be cheaper? That’s just a side note.
2. I noticed that the assembly I picked up doesn’t have a stand with flow for extra oil, like I had on mine. How necessary is that? Should I just swap out one from mine or keep it as it is?
3. Push rods. Some of the ones I picked up are slightly bent, so I’m thinking of a new set (or just replace the ones that bent). RockAuto gives me 2 options:
- SBI 1901280 (8 inches long)
- Melling MPR 81 (7.85 inches long)
Any suggestions on these ones?
Thanks, Tim
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1) Are you asking why people don’t rebuild the non adjustable one with adjustable rocker arms and the cup/ball pushrods? The reason I assume is cost and availability. it seems the only OEM adjustable rocker arms are available at Rocker Arms Unlimited (RAU) unless you choose to buy the Australian Yella Terra aftermarket ones (comes with pushrods and lifters). Personally, I was planning to go the Yella Terra route but I was able to secure a rebuilt adjustable assembly with ball/cup pushrods, some spare parts and with the mod to the rearmost rocker shaft support for better oil flow to the rocker shaft for a fraction of the cost of a Yella Terra set or from RAU. I checked all of the usual suspects (Rock Auto, Clifford, Classic Inlines, etc…) for OEM adjustable arms and nobody appears to have NOS. I didn’t call RAU to check if they had stock.
2) I’m not sure how critical that piece (the stand with flow for extra oil) is. Hopefully someone knowledgeable can pipe in.
3) I have read that you get better geometry with the longer pushrods; @clochard68 mentioned it in a discussion about a head and adjustable pushrods a while back. More info and a link to his source here: https://fordsix.com/threads/winter-...ing-with-a-large-log.90134/page-3#post-731757
Looking forward to hearing about your successful conclusion.
2) I’m not sure how critical that piece (the stand with flow for extra oil) is. Hopefully someone knowledgeable can pipe in.
3) I have read that you get better geometry with the longer pushrods; @clochard68 mentioned it in a discussion about a head and adjustable pushrods a while back. More info and a link to his source here: https://fordsix.com/threads/winter-...ing-with-a-large-log.90134/page-3#post-731757
Looking forward to hearing about your successful conclusion.
frozenrabbit
Famous Member
That part is the oil return outlet for the rocker assembly.
WillingnessLimp
Well-known member
1. Yes, that was just my curiosity lol
RAU is charging $350 for a rebuild. He never offered a new assembly when I talked to him. Anyway, that was just a curious question, after I started researching parts to change.
3. Thank you, I’ll check it out!
But is it essential? The adjustable rocker assembly I got doesn’t have it, but I can swap it from my non adjustable assembly. Just wondering if I need to have it. In ford manual, it does show the oil return stand on the diagram.
frozenrabbit
Famous Member
I can't say for sure, '60-'62 and '63 supplement factory Falcon manuals show the drain back. My running '63 170 adjustable, and spare '65 200 head with adjustable both have it, but my on stand '70 200 non-adjustable does not.
Your non-adjustable set up does have it. What year is your head? Ford must have eliminated it at some point.
In theory, I think it would just increase over all rocker assembly oil pressure without it.
Your non-adjustable set up does have it. What year is your head? Ford must have eliminated it at some point.
In theory, I think it would just increase over all rocker assembly oil pressure without it.
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WillingnessLimp
Well-known member
My head and block are ‘66, this adjustable I picked up is from 170 engine, not sure of the year.
Could it be too much oil pressure in the arm? Also, I’m thinking maybe that’s why I didn’t have too much oil splatter from my rocker arm, when I ran it without valve cover - not much oil pressure. Also, I didn’t see much oil coming out of the valve side.
frozenrabbit
Famous Member
Having the drain back could have maybe caused less oil to that front lifter. I'd run it without it.
WillingnessLimp
Well-known member
WillingnessLimp
Well-known member
In terms of the pushrods, I found one at NAPA which is 0.2” longer than Melling/SBI
Just to be clear, are you talking about the loose oil splashing around the under the valve cover or the oil that exits the rocker arm shaft thru the stand on the opposite end that it enters? ( thru a stand )
It seems to me there would have to have some kind of restriction to keep oil pressure, like feed another part of the engine. Or maybe the rocker shaft is the end of line and doesn’t go anywhere else?
I am not familiar with the lubercation flow on 200
frozenrabbit
Famous Member
Rocker assembly bolts all have a secondary step down on the shank. Maybe you are thinking about the single head bolt that is stepped or flat for oil supply to the head, driver's side rear bolt.
Yep that sounds like what I was trying to remember. Would the wrong head bolt mess up the oil flow to the rocker assembly.
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