Re: Starter motor fault check list
Posted: Fri Jan 18, 2019 1:06 am
Hi Geoff,
It may be worthwhile using a vernier to measure the depth of the flywheel from the fitting face. Also, if you put 12 volts onto the spade connector, on the starter, the gear and shaft will extend, but will not turn. Measure the before and after and you have the throw of the starter. With these measurements, you should be able to ascertain what depth engagement you are getting between the pinion teeth and ringgear.
When I came to fit my Hi-Torque starter, I was only getting 3 mm of engagement over a 9 mm wide ringgear.
The easiest fix was to swap the pinion with a pinion with teeth that were 6 mm longer. I then had total engagement.
I see that Wosp (wosperformance.co.uk) sells a longer pinion for the Denso style starter. Part number: LMPK0929L.
Cheers,
Colin.
quote="Geoffers71"]Well I'm stuck as to what to do next. This hi-torque starter motor from SJ doesn't seem to be meshing properly although, of course, it's supposed to be pre- engaged. The noise from it when starting is alarming, a sort of graunching (is there such a word?) as if the pinion is not, as I said, meshing properly. It does start the car alright though. It LOOKS as if the body of the motor is flush and secure against the bell housing, but I can't be 100% sure as it's so difficult to see. I was initially worried that the pinion teeth, there ARE 9 of them, were not much more than a couple of cms long and might not be long enough to engage fully with the flywheel teeth, but it does have a label on it that says it's for a twin cam. I've loosened the securing bolts right off so that the motor is loose and wiggled it around to bed it in as well as I can considering I'm lying on my back and can't see anything. I tried to support it on a block of wood while tightening the bolts as I can't do both. Really fed up with it now, I think I'm going to find a local friendly garage who can have a look at it for me. Unless of course any of you bright souls have any suggestions [/quote]
It may be worthwhile using a vernier to measure the depth of the flywheel from the fitting face. Also, if you put 12 volts onto the spade connector, on the starter, the gear and shaft will extend, but will not turn. Measure the before and after and you have the throw of the starter. With these measurements, you should be able to ascertain what depth engagement you are getting between the pinion teeth and ringgear.
When I came to fit my Hi-Torque starter, I was only getting 3 mm of engagement over a 9 mm wide ringgear.
The easiest fix was to swap the pinion with a pinion with teeth that were 6 mm longer. I then had total engagement.
I see that Wosp (wosperformance.co.uk) sells a longer pinion for the Denso style starter. Part number: LMPK0929L.
Cheers,
Colin.
quote="Geoffers71"]Well I'm stuck as to what to do next. This hi-torque starter motor from SJ doesn't seem to be meshing properly although, of course, it's supposed to be pre- engaged. The noise from it when starting is alarming, a sort of graunching (is there such a word?) as if the pinion is not, as I said, meshing properly. It does start the car alright though. It LOOKS as if the body of the motor is flush and secure against the bell housing, but I can't be 100% sure as it's so difficult to see. I was initially worried that the pinion teeth, there ARE 9 of them, were not much more than a couple of cms long and might not be long enough to engage fully with the flywheel teeth, but it does have a label on it that says it's for a twin cam. I've loosened the securing bolts right off so that the motor is loose and wiggled it around to bed it in as well as I can considering I'm lying on my back and can't see anything. I tried to support it on a block of wood while tightening the bolts as I can't do both. Really fed up with it now, I think I'm going to find a local friendly garage who can have a look at it for me. Unless of course any of you bright souls have any suggestions [/quote]