Daimler V8 1968
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dstjohn (11-15-2015)
#3
Coils are cheap, the only way to be sure if the coil is faulty is to substitute with a known working coil.
What happens is that over many years of heating and cooling (expansion and contraction) of the copper windings, the varnish that insulates the copper wire breaks down, this can cause internal shorting and out right failure. The shorts cause weak/intermittent spark.
Generally the shorts/failures usually occur in the secondary winding _ the secondary winding have thousands of turns of very fine copper wire and are more susceptible to failure.
Any 12 volt coil will work, but make sure to get the correct one _ with an external resistor or none.
The coil needing an external resistor will have around 1.5 ohms across the primary windings and the coil that doesn't need an external resistor will have 3 or more ohms across the primary windings.
That is the resistance across the negative and positive terminals of the coil.
With out checking, your Daimler uses a 3 ohm coil.
Also, the coil on the Daimler is probably mounted side ways, so an oil filled coil can leak over time.
A coil that is epoxy filled is recommended, but make sure that the coil is the problem before going out and spending money on an epoxy filled coil.
Last edited by JeffR1; 11-14-2015 at 11:57 PM.
The following users liked this post:
dstjohn (11-15-2015)
#4
Daimler v 8 coil
has not been tested. (it's not their money, so it's simple for them, replace)
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