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#781495 - Sat Sep 17 2011 01:23 PM Re: Adjusting Valve Lash on 235 [Re: Duwem]  
tclederman  Online
Joined: Sep 2001
Posts: 25,158
Jarvisburg, NC

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.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 46 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your foot-starter, either you, or your starter, or your engine, has a problem.


#781523 - Sat Sep 17 2011 06:01 PM Re: Adjusting Valve Lash on 235 [Re: tclederman]  
Duwem  Offline
New Guy
Joined: Oct 2010
Posts: 58
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

#782132 - Tue Sep 20 2011 01:23 AM Re: Adjusting Valve Lash on 235 [Re: Duwem]  
Duwem  Offline
New Guy
Joined: Oct 2010
Posts: 58
WI
Anyone? Hoping to get this back together and running again.



1950 3100 Project-just getting started

#782135 - Tue Sep 20 2011 01:32 AM Re: Adjusting Valve Lash on 235 [Re: Duwem]  
tclederman  Online
Joined: Sep 2001
Posts: 25,158
Jarvisburg, NC

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?


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 46 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your foot-starter, either you, or your starter, or your engine, has a problem.

#782162 - Tue Sep 20 2011 02:52 AM Re: Adjusting Valve Lash on 235 [Re: sm]  
LONGBOX55  Offline
Master Gabster
Joined: May 2006
Posts: 9,470
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

#782197 - Tue Sep 20 2011 04:32 AM Re: Adjusting Valve Lash on 235 [Re: LONGBOX55]  
Duwem  Offline
New Guy
Joined: Oct 2010
Posts: 58
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

#782210 - Tue Sep 20 2011 05:09 AM Re: Adjusting Valve Lash on 235 [Re: Duwem]  
Hotrod Lincoln  Online
Extreme Gabster
Joined: Feb 2004
Posts: 14,808
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



The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!

#782230 - Tue Sep 20 2011 11:14 AM Re: Adjusting Valve Lash on 235 [Re: Hotrod Lincoln]  
truckernix  Offline
Joined: Mar 2002
Posts: 8,849
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!

#782236 - Tue Sep 20 2011 12:43 PM Re: Adjusting Valve Lash on 235 [Re: truckernix]  
tclederman  Online
Joined: Sep 2001
Posts: 25,158
Jarvisburg, NC

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.


Tim
1954Advance-Design.com
1954 3106 Carryall Suburban - part of the family for 46 years
1954 3104 5-window pickup w/Hydra-Matic
Z-series (54/55) GMC 350 (2-ton) COE
If you have to stomp on your foot-starter, either you, or your starter, or your engine, has a problem.

#782380 - Wed Sep 21 2011 01:31 AM Re: Adjusting Valve Lash on 235 [Re: tclederman]  
Oilrag  Offline
Shop Shark
Joined: Apr 2006
Posts: 500
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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