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Truck wont start
#1412169 Mon May 31 2021 09:22 PM
Joined: Jan 2021
Posts: 17
S
SteveJ Offline OP
'Bolter
I have a 1949 Chevy 3600 that I have been working on over the past several months. My current issue is the truck won't start, when it did previously. I recently rewired the truck using a harness from classic parts and kept it 6 volts. I have replaced the positive and negative cables from the battery, and removed and cleaned the ground strap. All of this was done previously and the truck started. I also have a trickle charger on the battery which is new.

Now when I press the foot start pedal there is nothing or one "clank". No turning over at all. If I manually push the starter switch (which is new) the starter will run, but if I push the pedal down and try to engage the engine, it is like there is not enough power to turn the engine over. I have 6.3 volts at the battery and 6.3 volts putting my meter on the starter switch and on where the negative cable is attached to the engine. Why did it work yesterday and not today?

I have disconnected the new windshield wiper motor that I installed yesterday and no change. From what I read I thought this was a ground issue, but I am not sure what to try next. Very frustrated. I am trying to learn as I go, so not sure if I am even looking at the right places. Not sure if my explanation is clear. Any thoughts would be appreciated.

Steve


1949 chevy 3600
First attempt at restoration
Re: Truck wont start
SteveJ #1412172 Mon May 31 2021 10:28 PM
Joined: Mar 2014
Posts: 2,364
J
'Bolter
Make completely certain you have a good ground connection from the battery to the frame and also from the engine to the frame. This sounds exactly what happened to me with a 6v GMC about 40 years ago.


Jon

1952 1/2 ton with 1959 235
T5 with 3.07 rear end
Re: Truck wont start
SteveJ #1412176 Mon May 31 2021 10:46 PM
Joined: Apr 2005
Posts: 9,900
Grease Monkey, Moderator General Truck Talk & Greasy Spoon
As Jon said, you have more than one ground to worry about. Clean them all to bare metal.


Martin
'62 Chevy C-10 Stepside Shortbed (Restomod in progress)
'47 Chevy 3100 5 Window (long term project)
‘65 Chevy Biscayne 4dr 230 I-6 one owner (I’m #2) “Emily”
‘39 Dodge Businessmans Coupe “Clarence”



"I fought the law and the law won" now I are a retired one!
Support those brave men/women who stand the "Thin Blue Line"! Hug a cop!
USAF 1965-1969 Weather Observation Tech (I got paid to look at the clouds)

Re: Truck wont start
SteveJ #1412179 Mon May 31 2021 10:54 PM
Joined: Sep 2020
Posts: 59
H
'Bolter
You need good connections at both power and ground.

Since you can push the switch and hear the starter spin, you have proper connections, but corrosion at one or more increases resistance, which makes the starter not turn when the starter gear engages the flywheel.

Re: Truck wont start
SteveJ #1412184 Mon May 31 2021 11:51 PM
Joined: May 2005
Posts: 8,245
B
Sir Searchalot
As far as grounds, it's only a few.
1. Ground Connection at battery post. Clean, inspect and reclamp.
2. Ground Connection at starter mounting bolt. This is where battery ground is attached. Clean to bare metal and inspect.
3. Starter bolting to bell housing. Clean to bare metal at starter face and bell housing face. No paint!!!
4. Ground strap is not in play.

Next issues:
1. Battery positive cable post. Clean, inspect and reclamp.
2. Battery positive cable to starter button stud. Check.
3. Battery breakdown under load. Get it load test at two FLAPS.
4. Starter breakdown under load. Get it tested if you can find anyone to test it.
5. Be sure starter drive "bendix" is engaging. What exactly is the "clank"??????


Other unspeakables:
1. Hydraulic lock- check oil for milky look.
2. Timing gear and other mechanicals broken.
3. Trickle chargers have been known to sulfate batteries.

Bless our Troops: Past and present. Near and far.


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
Sometimes no nonsense makes sense, in a sense.
You can't teach a new dog old tricks.
Honk if you're Amish


Re: Truck wont start
SteveJ #1412192 Tue Jun 01 2021 12:59 AM
Joined: Mar 2010
Posts: 558
B
Curmudgeon
Maybe I'm too dense so humor me if I'm off. You said:

If I manually push the starter switch (which is new) the starter will run.
If I push the pedal down and try to engage the engine, it is like there is not enough power to turn the engine over.

To me that sounds like the mechanical foot starter linkage is not pushing the starter switch all the way in.

Re: Truck wont start
SteveJ #1412193 Tue Jun 01 2021 01:09 AM
Joined: May 2005
Posts: 8,245
B
Sir Searchalot
No you are not dense. That is a good point.


Watch out for careful drivers!!!
I'm away on an ego trip. Will be back on Feb 30.
I'm not an Auto Mechanic, but I play one on TV.
I charge $0.02 for every opinion and I take Paypal.
Plan B is always better than plan A, by definition.
Sometimes no nonsense makes sense, in a sense.
You can't teach a new dog old tricks.
Honk if you're Amish


Re: Truck wont start
SteveJ #1412194 Tue Jun 01 2021 01:33 AM
Joined: Mar 2010
Posts: 558
B
Curmudgeon
The picture is not exactly the same as what we have.
Also, heaven forbid, that the starter teeth are not having trouble engaging the flywheel and hinders the switch from closing fully.

Attached Files
Starter Example 01.jpg (57.48 KB, 136 downloads)
Re: Truck wont start
SteveJ #1412196 Tue Jun 01 2021 01:45 AM
Joined: Feb 2004
Posts: 22,586
H
'Bolter
Shade tree diagnostic trick- - - - -slip the screw top from a Coke bottle over the switch button and push the pedal. If the engine cranks, find the sloppy hole(s) in the mrechanical linkage and fix them.
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!
Re: Truck wont start
Hotrod Lincoln #1412200 Tue Jun 01 2021 01:57 AM
Joined: Jan 2021
Posts: 17
S
SteveJ Offline OP
'Bolter
Thanks for the feedback so far. I have tried the trick of putting something over the switch button and nothing.

However, there have been times during this episode where the linkage did not push the starter button all the way in. Is this a sign of bigger issues. What are "sloppy holes in the mechanical linkage"?


1949 chevy 3600
First attempt at restoration
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