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Valve Lash Specs & Adjustment

Posted By oldcarmark 7 Years Ago
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Talkwrench
Posted 7 Years Ago
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Shaggy
Posted 7 Years Ago
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I think my 292 was around .040 when I got it.
oldcarmark
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Ontario Canada. Whats interesting about my Sunliner is that it was built in Canada. Not a lot of this Model were built here. Unique Color only on Canadian Cars. I am relieved that adjusting the Valves fixed my Idle Problem. Starting to wonder if there was a problem with burnt Valves or Ignition Wire Problem.

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miker
Posted 7 Years Ago
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Very nice, glad the little issues are working out. What part of the world are you in?

miker
55 bird, 32 cabrio F code
Kent, WA
Tucson, AZ
oldcarmark
Posted 7 Years Ago
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oldcarmark
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Talkwrench
Posted 7 Years Ago
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Whoa whoooaaa..! Mark you have a Sunliner..and have we seen pictures of this...?? 



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Tedster
Posted 7 Years Ago
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oldcarmark (7/10/2018)
I  adjusted the Valve Lash this Afternoon. I found about 5-6 with little or no Lash. Used the 1/4 turn System and verified as best Possible with Feeler Gauge just to double Check ... Couldn't get it to Idle even with the new Carb. No wonder with several Valves never closing ... Not sure why she wants to park in the Garage???? 

When using the 90° turn method keep in mind, just so we're clear, there's no point to using a feeler gauge it's not needed or even wanted, don't change the resulting gap after you make the turn. Valve Lash will tend to get tighter over time. Valve recession for example.

Garage - well, that's just crazy talk!!!
oldcarmark
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I  adjusted the Valve Lash this Afternoon. I found about 5-6 with little or no Lash. Used the 1/4 turn System and verified as best Possible with Feeler Gauge just to double Check. I bought this Sunliner about 2 Months ago.22,000 Miles on the Car since Frame-off in 1985. So far replaced the Intake with a "B", 390 Holley, 1957 Distributor, and Aluminum Rad. Couldn't get it to Idle even with the new Carb. No wonder with several Valves never closing. Straightened out the Linkage that I was asking about in One of my Previous Posts. Well it runs like a Watch now. Stays cool with the Aluminum Rad. After going over this car since I bought it I realize now it probably has seen little if any Use for at least 5 Years or so. Been in good dry Storage. For a 33 Year old Restoration its in excellent Shape. Just needs some Mechanical TLC which is really coming along well now. Canadian built Car with Canadian only Exterior Color Carousel Red, Power Seat, Power Top, Power Windows, Power Steering and light Tinted Glass. I will be selling my Town Sedan. Wife wants to use the Garage come next Winter. Not sure why she wants to park in the Garage???? 

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Tedster
Posted 7 Years Ago
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Supercharged

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Talkwrench (7/9/2018) "Its like words from a higher power"....Wink


LOL, well I try to help but, as far as divine intervention, as they say, "your mileage may vary".

I took a closer look at all the original rockers after replacement and what surprised me was how what appears to be even just a small amount of wear on the face can interfere with accurate lash adjustment. A few thousandths one way or the other probably isn't the end of the world but getting them all consistent makes for a smoother running motor.

It may be the wear and galling that's typical on the rocker bores and shaft has an outsize effect. All the slop or excess clearance has to be taken up before anything moves. The "1/4 turn" allows for some of this, but not all of it.

With fresh valve springs and the new rockers, shafts, pushrods &c I realized a 5 to 10 psi compression improvement in several cylinders, everything is evened up now.


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