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Old 09-14-2008, 03:16 AM
NoCalMer's Avatar
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Join Date: Nov 2005
Location: California
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Changed Starter Solenoid & problem is worse

I have been driving this year with a flaky starter solenoid. It takes a few times to engage the engine sometimes when starting. I ruled out the key switch by shorting the screws on the fender awhile back.

I ordered a new Bosch Solenoid (part # 31035). I have a SR70X Bosch starter with the solenoid on the bottom cause of the trap. I pulled the solenoid today and had to drill out the screw heads since they were stuck and stripped. I got some new screws M5x.8 45mm long and installed the new solenoid. When I got it back in I turned the key and just got a click on the relay on the drivers fender and also could feel the starter solenoid click but not engaging of the engine or spinning. I tried it a few times with the same result. Pulled the starter again and put the old solenoid back on the starter. I put the starter back in with the same result I have been having for the past year. It clicks and then spins sometimes before engaging the engine and starting.

It seems like the solenoid is engaging but not pulling the piece back to push the ring gear out that turns the flywheel. What should I check next? What caused the flaky solenoid? I clean my old solenoid inside with steel wool and lightly oiled it and it didn't seem to help at all.

Any suggestions?

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Old 09-14-2008, 11:50 AM
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Quote:
Originally Posted by NoCalMer View Post
I have been driving this year with a flaky starter solenoid. It takes a few times to engage the engine sometimes when starting. I ruled out the key switch by shorting the screws on the fender awhile back.

I ordered a new Bosch Solenoid (part # 31035). I have a SR70X Bosch starter with the solenoid on the bottom cause of the trap. I pulled the solenoid today and had to drill out the screw heads since they were stuck and stripped. I got some new screws M5x.8 45mm long and installed the new solenoid. When I got it back in I turned the key and just got a click on the relay on the drivers fender and also could feel the starter solenoid click but not engaging of the engine or spinning. I tried it a few times with the same result. Pulled the starter again and put the old solenoid back on the starter. I put the starter back in with the same result I have been having for the past year. It clicks and then spins sometimes before engaging the engine and starting.

It seems like the solenoid is engaging but not pulling the piece back to push the ring gear out that turns the flywheel. What should I check next? What caused the flaky solenoid? I clean my old solenoid inside with steel wool and lightly oiled it and it didn't seem to help at all.

Any suggestions?
Just some ideas to take a look at.....I am sure that you have inspected the starter when you took it out, but sometimes, the starter drive gear gets rounded off, and will not engage the flywheel ring on the first try. The other thing to consider are the starter brushes....sometimes, you get a flat spot on the starter armature, which will not allow the starter to energize. When the trouble you mention happens, you might want to consider tapping the starter case with a small hammer of block of wood. If the starter responds, you might consider getting a new or re-manufactured one. Good luck
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Old 09-14-2008, 12:36 PM
Biodiesel300TD's Avatar
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Join Date: Dec 2004
Location: Albany, OR
Posts: 4,845
I tried putting just a solenoid on a 240 once and it did the same thing. There was no change in the starting issues. I ended up putting on a whole new starter. Which fixed the issue. I don't know why the solenoid didn't fix the issue but it didn't. I was having the same issues you were. A whirring of the solenoid but no starter. Then I put the new solenoid on and it didn't change anything.

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