Crossflow Engine Earthing

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Jonathan Kay
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If you're going to change the starter how about before and after audio clips of cranking?

Jonathan

saundersian
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Starter removed and stripped. All looked OK, no obvious problems and clean. However, during removal, I noted the securing bolts were not as tight as I would have thought they would be. On removing the starter, I noticed the face of the flange of the motor and the mounting face on the bellhousing were covered with a fine film of oil. Both faces were cleaned with meths, the starter replaced and bolts tightened up satisfactorily. On starting a vast improvement in cranking speed over previous. I can only assume the starter motor earths to the engine through its mounting on the bellhousing and this was  compromised by slack mounting and oil on the flange faces

Jonathan Kay
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Glad it's fixed.

I agree, and I think that's consistent with what you've observed.

How many cables are connected to the starter and solenoid?

And how is the alternator earthed?

Jonathan

saundersian
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One cable between the starter and solenoid. (+ve feed)

The solenoid has the above cable to the starter, a cable to the battery +ve terminal and a wire which disappears into the wiring loom (presumably to the ignition switch). 

There is a single wiring block connected to the alternator with all wires going directly into the loom. I presumed the alternator earthed through its mounting bracket and bolts direct to the engine block.   

 

 

 

 

 

 

 

 

 

 

Jonathan Kay
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Thanks

Jonathan

randybugger
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After reading this I couldn't remember ever seeing an earth from engine to chassis and  on inspection there wasn't one! Now fitted and car starts much easier.

just goes to show. It pays to read tech talk.

randybugger
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After reading this I couldn't remember ever seeing an earth from engine to chassis and  on inspection there wasn't one! Now fitted and car starts much easier.

just goes to show. It pays to read tech talk.

saundersian
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Just noted on page 108 of Weale, the top photo seems to show what looks like an earth lead attached to one of the pedal bracket mounting bolts. I think this may be the earth strap I recalled in my original post with the other end of the lead terminating in a terminal attached to one of the bellhousing bolts. Can anyone confirm this? 

Jonathan Kay
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saundersian
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Thanks Jonathan- that’s the photo.

Must learn how to post photos on Blatchat I’m a bit of a Luddite, maybe that’s why I have a Crossflow!!