Battery question
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Cargo Master
Joined: Oct 2011
Posts: 2,246
Likes: 303
From: Kenner,La.
Battery question
A friend recently purchased a 38 Ford passenger car and it does turn over very well.
I looked at it and it has a 6 volt AGM battery with 12 volt cables. I told him the cables have to go and be replaced with the correct size 6 volt ones as well as the battery. Now the AGM has a high cold crank spec but I told him to get a 6 volt lead acid battery anyway as that is how the car was originally built and they worked correctly.
Any suggestions on what lead acid battery would be the best?
In addition he started telling me about 60 and 85 HP engines have different flywheels with 9 and 10 tooth starter gears along with 2 different length starter shafts. Needless to say all this is way before my time working on cars so someone please set me right so that I can help him.
I looked at it and it has a 6 volt AGM battery with 12 volt cables. I told him the cables have to go and be replaced with the correct size 6 volt ones as well as the battery. Now the AGM has a high cold crank spec but I told him to get a 6 volt lead acid battery anyway as that is how the car was originally built and they worked correctly.
Any suggestions on what lead acid battery would be the best?
In addition he started telling me about 60 and 85 HP engines have different flywheels with 9 and 10 tooth starter gears along with 2 different length starter shafts. Needless to say all this is way before my time working on cars so someone please set me right so that I can help him.
Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,367
Likes: 1,785
From: Western NY
6V AGM is perfectly fine. No need to go out and get lead acid. Most auto parts chain stores can load test the battery for you.
Provided the battery is healthy, next thing is to check all the cables and grounds. As you stated, replacing the older probably 4 gauge wires with new 00 or 2/0 will be a huge help! Don't forget the cable going from the solenoid to the starter itself!
The starter typically grounds through the mounting face. Be sure that is clean and clear of paint or other debris - you want metal to metal contact.
If the solenoid is older, the contacts can become worn and increase resistance. A new 6V solenoid is cost effective piece of mind IMHO.
Getting back to the grounds, be sure you have good grounds to the block, the frame, and the cab. SMP B14 is a good readily available style to go from the battery to the principal ground. B12G is good for secondary grounds.
As for flywheel and starter, yes, there were different combinations. More details about on the vehicle and engine and I can look up what is needed.
Provided the battery is healthy, next thing is to check all the cables and grounds. As you stated, replacing the older probably 4 gauge wires with new 00 or 2/0 will be a huge help! Don't forget the cable going from the solenoid to the starter itself!
The starter typically grounds through the mounting face. Be sure that is clean and clear of paint or other debris - you want metal to metal contact.
If the solenoid is older, the contacts can become worn and increase resistance. A new 6V solenoid is cost effective piece of mind IMHO.
Getting back to the grounds, be sure you have good grounds to the block, the frame, and the cab. SMP B14 is a good readily available style to go from the battery to the principal ground. B12G is good for secondary grounds.
As for flywheel and starter, yes, there were different combinations. More details about on the vehicle and engine and I can look up what is needed.
Thread Starter
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Cargo Master
Joined: Oct 2011
Posts: 2,246
Likes: 303
From: Kenner,La.
Battery question
Thanks for the reply. The owner just bought this car which is original and in good condition. He says the engine is a 85 HP model. I told him that over the years who knows what flywheel, starter engine combination may have been swapped especially during the WW2 years as I have been told parts were hard to get at that time.
We will have to count the flywheel teeth to hopefully start in the right direction.
The AGM is 3 years old so maybe he should get a new one also.
Does anybody know anything about the different length starter shafts?
We will have to count the flywheel teeth to hopefully start in the right direction.
The AGM is 3 years old so maybe he should get a new one also.
Does anybody know anything about the different length starter shafts?
Parts Nerd Extraordinaire
Joined: Sep 2010
Posts: 4,367
Likes: 1,785
From: Western NY
The serial number will tell you the model of the vehicle. Models 81A had the 85 HP V8. The Model 82A had the 60 HP V8.
Starter 18-11002 was used on the 85 HP V8 passenger vehicles 32-42 and had a 10 tooth bendix drive and 112 tooth flywheel for this application. This used a 18-11005 armature assembly.
Starter 52-11002 was used on the 60 HP V8 passenger vehicles 37-40 and had a 9 tooth bendix drive and 122 tooth flywheel for this application. A 52-11005 armature assembly was used here. Much of this setup was shared with the Ford N series tractors.
Starter 18-11002 was used on the 85 HP V8 passenger vehicles 32-42 and had a 10 tooth bendix drive and 112 tooth flywheel for this application. This used a 18-11005 armature assembly.
Starter 52-11002 was used on the 60 HP V8 passenger vehicles 37-40 and had a 9 tooth bendix drive and 122 tooth flywheel for this application. A 52-11005 armature assembly was used here. Much of this setup was shared with the Ford N series tractors.
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