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Starter motor works on bench but not in car


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Raynman
Novice

Oct 30, 2020, 12:40 AM

Post #1 of 17 (240 views)
Starter motor works on bench but not in car Sign In

I've got a denso starter motor that was clicking and only spinning occasionally after reputedly turning the key so I "rebuilt" it and now it works fine on the bench but still does the same thing in the car. I've fitted a starter motor from a different vehicle and it seems to work every time I turn the key. Could it be the ignition circuit going bad and the other starter requires less amps or something and that's why it works and the other doesn't?


Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 30, 2020, 3:45 AM

Post #2 of 17 (225 views)
Re: Starter motor works on bench but not in car Sign In

OK, YOU rebuilt it not bought that way? It works in another vehicle and on bench barely counts but does some. Just clicking and sometimes cranks engine?
I'm asking those questions it's just not so clear to me.
I'll guess away that starter probably is enough but lacks proper amps to it now via lousy cables or still a connection somewhere don't forget grounds.


Please try to start off with what the vehicle is helps as a baseline in this case I made a fair guess. The next would be lousy trigger wire connection, after that it's too tight and needs shims but can't go there quite yet,


T



Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 30, 2020, 5:37 AM

Post #3 of 17 (220 views)
Re: Starter motor works on bench but not in car Sign In


Quote
I've got a denso starter motor that was clicking and only spinning occasionally after reputedly turning the key so I "rebuilt" it


You rebuilt it? You mean you replaced the brushes and maybe the solenoid?
I'm sure you don't possess the knowledge or equipment to totally do an actual rebuild of the unit.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 30, 2020, 7:27 AM

Post #4 of 17 (209 views)
Re: Starter motor works on bench but not in car Sign In

I asked HT on that and do, do some. If new parts it's what you just said. I shine up contacts NOT like turning them - no metal to do that anymore and or shine up brushes. Then run them like a break-in. Most work fine but no load test ability (by me) the test is in vehicle.
The joke is on us with buying rebuilds - that's about all they can do too! Now hard to find guts to costly stuff this might be if easy R&R try but still just smell not enough amps? T


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 30, 2020, 7:38 AM

Post #5 of 17 (206 views)
Re: Starter motor works on bench but not in car Sign In

I'm sure he didn't grind the armature, test the armature, replace the magnets, replace the bearings, etc.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 30, 2020, 7:49 AM

Post #6 of 17 (201 views)
Re: Starter motor works on bench but not in car Sign In

IDK what's possible on this one? Been a while most no bearings just bushings. If "magnets" are NFG it's gone to me. It's ones where "glaze" is wrecking contact of brushes to armature surfaces you can fix new or just clean up is what local BRAND NAME rebuilder does! It's why we get new if we can on this stuff NOT meant to redo them since Eisenhower, Rambler, DeSoto and Studebaker were household words. Laugh - still have one with oil cups at the bushings!
Tom

(This post was edited by Tom Greenleaf on Oct 30, 2020, 7:50 AM)


willierfelton
New User

Oct 30, 2020, 2:14 PM

Post #7 of 17 (174 views)
Re: Starter motor works on bench but not in car Sign In

I'm certain he didn't granulate the armature, test the armature, supplant the magnets, supplant the orientation, and so on.

Regards,


Link deleted ......... not allowed


(This post was edited by Hammer Time on Oct 30, 2020, 4:28 PM)


Raynman
Novice

Oct 30, 2020, 2:38 PM

Post #8 of 17 (168 views)
Re: Starter motor works on bench but not in car Sign In

Ok i shouldn't have said "rebuilt". I replaced the plunger and contacts and took the whole thing apart and cleaned every contact surface i could fine and greased all bearings.

The car is a 1989 subaru l series.

The starter motor now works fine when testing it on the bench (didn't work during test bench before contact and plunger replacement) but still only clicks when fitted to the vehicle.

I ftried another starter motor from a Subaru liberty in my l series and it works 100%.


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 30, 2020, 4:30 PM

Post #9 of 17 (157 views)
Re: Starter motor works on bench but not in car Sign In

Working on the bench with no load means nothing as to how it will act when under load.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Raynman
Novice

Oct 30, 2020, 6:04 PM

Post #10 of 17 (150 views)
Re: Starter motor works on bench but not in car Sign In

But the fact it didn't work on the bench before and now that I've replaced the contacts and plunger it works on the bench does tell you something. :) any reason for the hostility?


(This post was edited by Raynman on Oct 30, 2020, 6:12 PM)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 30, 2020, 6:12 PM

Post #11 of 17 (142 views)
Re: Starter motor works on bench but not in car Sign In

Yes, it tells me that the old starter was totally worn out and should have been replaced, not repaired.
It's 39 years old and a couple of brushes and some oil isn't going to make it new again.



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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Raynman
Novice

Oct 30, 2020, 6:15 PM

Post #12 of 17 (138 views)
Re: Starter motor works on bench but not in car Sign In

Couldve said that the first time. Since it's a genuine part it was definitely worth trying to fix since you can't buy them new anymore and the replacement parts are cheap Chinese garbage.


Tom Greenleaf
Ultimate Carjunky / Moderator
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Oct 30, 2020, 11:25 PM

Post #13 of 17 (106 views)
Re: Starter motor works on bench but not in car Sign In

Raynman: Truth is the parts for "rebuilding" are junk also!
Late here now, duly noted from top post this lacked info on what was being worked on just a few posts back is from or about an 89 Subaru? That's a mix of age old quality you could work with or junk new IDK which, you need to look hard at the one in front of you.


The best of the best was first made to be 6 volt! Those you could machine down again and again, get real parts and just keep going.


Just BTW - the brand name smacks of quality (Denso) at least once the name was enough. Know that these names sold out also to that cheap junk buying that brand name only and sell you the junk new? Hard to know but need to.


Said I'll do this isn't enough sometimes the subject vehicle is such junk overall don't waste good $$ on it as it will croak from a 100 other problems lurking so just buying some time.


Load testing?: Said I can't except for putting a "starter" in this case in the engine for the load simply don't own or have access to a machine to do that. Jumping around on a work bench or floor testing one isn't under load but shows it works at all only.


This thread is all about that isn't so easy to know where the problem is now knowing what we are dealing with default would probably be new rather than redo/rebuild is just cleaning these up it's way past high quality to begin with - still guessing I don't have the thing in my hands to make that call,


Tom



Raynman
Novice

Oct 30, 2020, 11:40 PM

Post #14 of 17 (101 views)
Re: Starter motor works on bench but not in car Sign In

You're right, even if the whole things was rebuilt it would be with junk parts and I'm probably better off just buying a replacement thr only problem is they're ridiculously expensive and have a huge amount of bad reviews.

I'll pretend you didn't call my car junk:) it's a project car that's why I'm reluctant to spend money in it and yes I know 100 other things will break but that's project cars for you also a lifted, ej22 swapped l series like mine isn't that common and I love its irrelevant how "junk" you think it is.

Although you seem to have an issue with people trying to fix old things instead of throwing them in the bin I will thank you for your advice:)


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 31, 2020, 3:55 AM

Post #15 of 17 (93 views)
Re: Starter motor works on bench but not in car Sign In


Quote
Although you seem to have an issue with people trying to fix old things instead of throwing them in the bin I will thank you for your advice:)


The problem is that you are not "fixing" old things. You are shining them up and putting them back into the car. You're not fixing anything.

This thread is going nowhere. You are convinced you made the part new again and we are telling you that you did not.



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.



Raynman
Novice

Oct 31, 2020, 1:50 PM

Post #16 of 17 (72 views)
Re: Starter motor works on bench but not in car Sign In

Cool. This forum is Sh!t don't think I'll be posting here again


Hammer Time
Ultimate Carjunky / Moderator
Hammer Time profile image

Oct 31, 2020, 1:52 PM

Post #17 of 17 (70 views)
Re: Starter motor works on bench but not in car Sign In

No problem, I'll see to that



~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.







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