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Thinking again ...
We are still asking:
What did you
get done on
your Bolt today
????


The question, initially posted May 23, 2005, was:
"Whatcha do on your Bolt
this weekend?"

After 51,906,997 views, 7378 replies over 185 pages, this thread in General Truck Talk is a happening! And it's not just weekends anymore.


Now with pictures
and No BOTS.


So ...


What did you get done on your Bolt today????


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Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1434831 Mon Dec 27 2021 03:47 AM
Joined: Jun 2004
Posts: 8,530
W
'Bolter
AC-R45S is the correct plug for that engine. The s is for extended tip. It is a better plug then the recest tip originally used. In the late 50,s the extended tip plug was invented & most auto makers went to them. They cannot be used on flat head engines though. The R is for resistor plugs.
George


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1972 Chevy c10 Cheyenne Super
Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1434887 Tue Dec 28 2021 01:40 AM
Joined: Mar 2010
Posts: 1,107
B
Curmudgeon
The stock spark plug for a 235 was AC-44 for regular (non-Ethanol) gasoline.

Today:
AC-R43S = colder range spark plug
AC-R45S = hotter range spark plug

Which one is best for your engine depends on which gasoline type you plan to run.
Ethanol generates more heat than non-Ethanol.


"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."
Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1434913 Tue Dec 28 2021 12:27 PM
Joined: Sep 2019
Posts: 102
R
'Bolter
It seems that I read somewhere that you should not use the R45S plugs in a 235 because they extend farther than the old R44 and can burn a hole in the piston. But they’re okay for the 216. Those are what I am using in my 216. Anyone care to shine a little light on the subject and either confirm or dispel?


I invest my money in precious metals, mostly rust!
Re: Spark plugs for a 235 engine 1954 Chevrolet
Rusty Heaps #1434925 Tue Dec 28 2021 03:39 PM
Joined: Jun 2004
Posts: 8,530
W
'Bolter
Originally Posted by Rusty Heaps
It seems that I read somewhere that you should not use the R45S plugs in a 235 because they extend farther than the old R44 and can burn a hole in the piston. But they’re okay for the 216. Those are what I am using in my 216. Anyone care to shine a little light on the subject and either confirm or dispel?


It sounds like the dumbest thing I ever heard.


They say money can't buy happiness. It can buy old Chevy trucks though. Same thing.

1972 Chevy c10 Cheyenne Super
Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1434935 Tue Dec 28 2021 06:04 PM
Joined: Dec 2008
Posts: 1,088
5
'Bolter
My 55.2 3100 235, calls for AC R43.


Brian
1955.2 3100 Truck


The older I get the more dangerous I am!!!!!
Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1434951 Tue Dec 28 2021 08:24 PM
Joined: Mar 2010
Posts: 266
L
'Bolter
I just bought a set of Ac delco r45 spark plugs to replace the set of autolite plugs in my 235


This is no longer fun
Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1435227 Thu Dec 30 2021 04:12 PM
Joined: Mar 2007
Posts: 162
A
'Bolter
I chose the R43's, most of my driving is with the engine running high cruising RPM's, that's why I went with the colder plug.

Re: Spark plugs for a 235 engine 1954 Chevrolet
laybacklenny #1435264 Thu Dec 30 2021 09:00 PM
Joined: Sep 2011
Posts: 1,104
B
'Bolter
I've been running # 7 - ACDelco for years w/ langdon mini HEI. Plugs stay very clean.


BC
1960 Chevy C10 driver 261 T5 3.73 dana 44
1949 GMC 250 project in waiting
1960 C60 pasture art
Retired GM dealer tech. 1980 - 2022
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