Can anyone suggest a reason why two VW Golfs would persistently fail to start when the engines are hot. The starter motor won't turn the engine, but all other electrics work. The cars start ok when the engines are cold. The cars are/were '93 and '83.
Any ideas?
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do the starter motors on both cars just not turn at all when hot, or do they just get slower and slower as a result of the cars not starting?
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They don't turn at all. This usually happens after a long motorway journey.
Connecting a wire between the battery terminal and the starter motor solenoid will (usually) pull the solenoid in and start the car but this doesn't always work. The older car had most of the suspect components (battery, alternator, starter motor, gear lever switch, ignition switch) changed, but the gremlin persisted. Both cars are/were automatics.
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automatics is the clue. Don't know where but there is a mechanism that stops the starter motor turning if the autobox is in gear. Might be a switch somewhere that is playing up?
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I know there's a switch interlocked with the gearbox, but it was changed on the older car without any affect. Anyone know where the switch is located and if it's likely to be affected by a hot engine?
This same problem affected both cars, so is it a problem known only to VW enthusiasts and mechanics?
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If these cars have been fitted with exchange Bosch starter motors, there's a chance that the replacement bush/bearing/widget supplied with the replacement starter motor wasn't fitted. Independent garages not familiar with the problem wonder what it's there for and either shove it in the car owner's glove box (just in case) or bin it. Unfortunately, replacing this bush/bearing/widget is essential. Sorry for not being more technically precise, but that's all I can remember.
HJ
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