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Something NEW for the Bolters!

proudly announcing...

HEI for your 216/235/261 Stock Distributor!

Kits are easy to install and do no harm to your vintage distributor.

The entire kit instructions are available at:


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#364391 - Tue Jan 22 2008 08:30 PM 235 timing mark
philip t Offline
Shop Shark
Registered: Wed Jul 11 2007 12:00 PM
Posts: 243
Loc: central nc
i put a hei dist. in my 46 this weekend the engine.it is a 52 235
i pulled the valve cover and plugs bumped the engine over until the intake valve closed, turned the motor with the fan looking through the spark plug hole until at tdc. the rotor was pointing at number one. i put in the hei and it fired up. now comes the weird part
i could not find the timing mark with the light so i stoped put number one back on tdc of the compression stroke crawled under pulled the dust cover and the steel ball on the fly wheel is 180
from the pointer. why?
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#364482 - Tue Jan 22 2008 10:30 PM Re: 235 timing mark [Re: philip t]
Jim Meier Offline
Shop Shark
Registered: Tue Aug 21 2007 12:00 PM
Posts: 480
Loc: NW Ohio
Is this a trick question?
The steel ball is not 180 out, your distributor is.
Each cylinder hits TDC twice for one revolution of the crank.
The distributor turns at half the speed of the crankshaft.
If the steel ball is 180 out from the pointer you are in the number 6 cylinder firing position.
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#364509 - Tue Jan 22 2008 11:27 PM Re: 235 timing mark [Re: Jim Meier]
rustednuts Offline
Shop Shark
Registered: Fri Feb 10 2006 12:00 PM
Posts: 3165
Loc: Kingston, WA
If its a concern either pull and rotate the dizzy 180 degrees or swap the plug wires at the cap by rotating them out 3 plug positions over.

Jeff
_________________________
Hey guys, hows the weather? grin

Lifes to short to worry about how short life is.

1951 Oldsmobile Super 88 w/303 and hydramatic
My 1953 Chevrolet
1947.1 GMC Art Deco COE / 1947.1 Gallery
1972 C-10 1/2 Ton & 1972 C-30 1 Ton
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#364516 - Tue Jan 22 2008 11:44 PM Re: 235 timing mark [Re: rustednuts]
atomarc Offline
Master Gabster
Registered: Tue Jul 27 2004 12:00 PM
Posts: 5930
Loc: Eureka, CA
philipdltx18,

I'm confused. The flywheel is keyed to the crank. If you had #1 at TDC and the pointer on the ball...and the truck started and ran, then all is as it should be.

As Jim Meier noted, things can be 180&deg out, BUT, the truck wouldn't start! You said it started, so it isn't 180&deg out!

Why isn't the ball where it's suppose to be..I don't know. Some important fact has been overlooked. When you put a light on #1 plug wire, the ball must light up, that's the only way this engine operates.

Stuart
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#364695 - Wed Jan 23 2008 11:58 AM Re: 235 timing mark [Re: philip t]
philip t Offline
Shop Shark
Registered: Wed Jul 11 2007 12:00 PM
Posts: 243
Loc: central nc
i hear what you are saying jim but the piston only comes to tdc
on the compression stroke once. i rotated the engine until the intake valve closed then brought the piston up to tdc on 1 put in the dizzy the engine will run as it should but the ball on the flywheel is off
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#364700 - Wed Jan 23 2008 12:10 PM Re: 235 timing mark [Re: philip t]
atomarc Offline
Master Gabster
Registered: Tue Jul 27 2004 12:00 PM
Posts: 5930
Loc: Eureka, CA
I think there are several options here. You are looking at the incorrect mark on the flywheel, someone has altered the position of the flywheel on the crank (highly unlikely) or you are not clear on what you are seeing or the procedure you are using.

Keep us posted on this brain teaser!

Stuart
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#364737 - Wed Jan 23 2008 01:26 PM Re: 235 timing mark [Re: atomarc]
Jim Meier Offline
Shop Shark
Registered: Tue Aug 21 2007 12:00 PM
Posts: 480
Loc: NW Ohio
Philipdltx18,
I'm sorry, I'm sorry, I'm sorry. I gave out some bum information.
Earlier in the afternoon I had a root canal and thought the pain killers had wore off. I guess they hadn't.
The pistons hit TDC twice for every revolution of the distributor. The crank will have rotated twice for every rotation of the distributor.
This means that when the steel ball lines up with the pointer it is either on or 180 out. You are static timing it right by watching when the intake valve closes.
I had a similar problem when I put my 235 back together. What I finally ended up doing was watching when the intake valve closed,
then continued to rotate the engine until the ball lined up with the pointer. Then I set the distributor to fire on number 1 cylinder.
Then I followed up by using a timing light when the engine was running to rock in the timing adjustment.
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#364885 - Wed Jan 23 2008 06:16 PM Re: 235 timing mark [Re: Jim Meier]
tclederman Offline
Registered: Tue Sep 18 2001 12:00 PM
Posts: 20831
Loc: Castleton-on-Hudson, NY
Is it possible that some 235 clutch housings (car, maybe) had the timing hole on the carburetor/steering side of the engine (the flywheel would then be marked differently)? My question is probably ridiculous?
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#364924 - Wed Jan 23 2008 08:36 PM Re: 235 timing mark [Re: tclederman]
atomarc Offline
Master Gabster
Registered: Tue Jul 27 2004 12:00 PM
Posts: 5930
Loc: Eureka, CA
Tim,

I had a '54 Chevy car with a 235 and its peep hole for timing was on the conventional side...above the starter.

The ball is ALWAYS on the pointer when #1 is TDC. It might be TDC on exhaust or it might be TDC on compression, but the ball will always be on the pointer.

This wouldn't apply is someone mechanically altered the location of the flywheel to the crank, but there would be no reason to do this that I can think of...unless someone wanted to use a fresh section of ring gear and went through the trouble of drilling some new holes in the flywheel. I guess stranger things have happened huh!

Stuart
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#364956 - Wed Jan 23 2008 09:33 PM Re: 235 timing mark [Re: atomarc]
48bigtrucks Offline
Registered: Thu Mar 04 2004 12:00 PM
Posts: 4476
Loc: Center Point, Iowa
Dumb question, are you turning the engine over in the correct direction while watching the intake valve close?
Scott
_________________________
Scott Ward

2 1948 1.5-ton Loadmasters
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