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#781495 - Sat Sep 17 2011 08:23 AM Re: Adjusting Valve Lash on 235 [Re: Duwem]
tclederman Online
Registered: Tue Sep 18 2001 12:00 PM
Posts: 22739
Loc: Castleton-on-Hudson, NY

Sorry, Duwen, I missed your post with that block date code. I think you are correct with the 1958 interpretation (someone will correct us if we are wrong).

I248 = Sep 24 58
L248 = Dec 24 58

Nice photos of your truck that you linked-to on the other discussion board. Looks like you are very industrious. Pictures are nice to see - too bad none are allowed here.

It looks like you have a 54/55 235 valve cover (it has breathing slits in it).

Yes, the head date code is under the valve cover.
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#781523 - Sat Sep 17 2011 01:01 PM Re: Adjusting Valve Lash on 235 [Re: tclederman]
Duwem Offline
New Guy
Registered: Tue Oct 26 2010 12:36 PM
Posts: 58
Loc: WI
Pulled the valve cover. Found these numbers on the head:

Seen with cover on:
3835913
GM 12

Once removing the cover found these:

CON 9 G14

Does this help any?

Wiggling the rocker arms there does not appear to be any lash right now.

Here are some pictures with the cover off:

http://i22.photobucket.com/albums/b309/duwem/DSC01951.jpg

http://i22.photobucket.com/albums/b309/duwem/DSC01950.jpg


Any tips for resealing the valve cover? It had a cork gasket with a ton of orange RTV on either side. Should I try to straighten out the parts where the 4 screws go as they are dished some?

Got a new cork gasket.

_________________________
1950 3100 Project-just getting started
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#782132 - Mon Sep 19 2011 08:23 PM Re: Adjusting Valve Lash on 235 [Re: Duwem]
Duwem Offline
New Guy
Registered: Tue Oct 26 2010 12:36 PM
Posts: 58
Loc: WI
Anyone? Hoping to get this back together and running again.

_________________________
1950 3100 Project-just getting started
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#782135 - Mon Sep 19 2011 08:32 PM Re: Adjusting Valve Lash on 235 [Re: Duwem]
tclederman Online
Registered: Tue Sep 18 2001 12:00 PM
Posts: 22739
Loc: Castleton-on-Hudson, NY

Duwen,

I cannot figure out that code and it looks like you have posted it correctly (nice photos). Maybe someone will post an explanation/interpretation?
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#782162 - Mon Sep 19 2011 09:52 PM Re: Adjusting Valve Lash on 235 [Re: sm]
LONGBOX55 Offline
Master Gabster
Registered: Mon May 08 2006 12:00 PM
Posts: 9321
Loc: DANVILLE IL
Originally Posted By sm
what about this one Guys? I think it's a 58'ish 235. Not original to the truck, im sure.

FII03A - by the Distrib. (those are "i"'s not One's)
3769716 - casting code

thanks
stu

Stu, you'rs is a '58-'62 235 Passenger car with manual transmission engine, built at Flint on November 3rd. There should be a casting date near the sarter that will get you the year.
BTW, the "II" is supposed to be "11". I don't know whay they used I instead of 1, but I've seen it on several engines, including my own.
_________________________
Bill Burmeister
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#782197 - Mon Sep 19 2011 11:32 PM Re: Adjusting Valve Lash on 235 [Re: LONGBOX55]
Duwem Offline
New Guy
Registered: Tue Oct 26 2010 12:36 PM
Posts: 58
Loc: WI
I gota think looking at the rocker arms in the pictures someone can tell me if its hydraulic or solid lifters. One would think since there are adjusters it would be solid, but your saying even the hydraulics had adjusters?
_________________________
1950 3100 Project-just getting started
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#782210 - Tue Sep 20 2011 12:09 AM Re: Adjusting Valve Lash on 235 [Re: Duwem]
Hotrod Lincoln Offline
Extreme Gabster
Registered: Mon Feb 23 2004 12:00 PM
Posts: 12428
Loc: Dellrose, TN
The rocker arms on solid and hydraulic lifter engines are identical. The only way to be sure is to remove the side cover and look at the lifters themselves. Hydraulic lifters have a 2-piece construction with a small spring clip at the top which keeps the lifter parts from separating when the pushrod is removed. Solid lifters have 1-piece construction.
Jerry

_________________________
My six-pack grew up- - - -now it's a keg!

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#782230 - Tue Sep 20 2011 06:14 AM Re: Adjusting Valve Lash on 235 [Re: Hotrod Lincoln]
truckernix Offline
Registered: Sun Mar 24 2002 12:00 PM
Posts: 8518
Loc: Bracebridge Ontario Canada
I don't know about the lifters but if you really have a hose going from the fuel pump to the carb, I would be replacing that now with a steel line.
_________________________
1951 GMC 1 Ton Flatbed -- It is finally on the road and what a great time I have driving it!
1951 1 Ton Completed


My Chevy Master 4 Door is on the Road!
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#782236 - Tue Sep 20 2011 07:43 AM Re: Adjusting Valve Lash on 235 [Re: truckernix]
tclederman Online
Registered: Tue Sep 18 2001 12:00 PM
Posts: 22739
Loc: Castleton-on-Hudson, NY

Yes, it is a passenger car engine (from engine serial number).
Yes, it came from the factory with hydraulic lifters (all 56-62 235 car engines had hydraulic lifters).
Yes, it has a 1958 block date code (shown above).

Does anyone have an interpretation for the head date-casting code?
CON 9 G14 (it looks like Duwen got that code from the correct location - check his photos).

Duwen, Jerry's advice is the best advice to be be certain that your engine still has hydraulic lifters. Check a lifter. You'll most likely have to replace the side cover gasket.
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#782380 - Tue Sep 20 2011 08:31 PM Re: Adjusting Valve Lash on 235 [Re: tclederman]
Oilrag Offline
Shop Shark
Registered: Sun Apr 16 2006 12:00 PM
Posts: 500
Loc: PA, USA
Tim,

Is G14 his head date code?
Head casting 3835913 was available in 54.
And as you pointed out his valve cover is a 54/55.

Duwem, Yes, straighten out the dished valve cover.
If you don't it will probably leak.
The "dish" comes from cranking the screws down too tight.
_________________________
-Tom

1950 Chevy 3100 w/ 1956 235
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