I while ago I replaced my starter, and regretfully cheeped out with a new one. When I start the car it makes a bad grinding noise when it starts up. I've noticed that when I turn the key and quickly release it it wont grind, but I cant always guess how long to crank it for, for it not to grind. I'm guessing that the starter solenoid is being engaged for to long? Could this be just the solenoid? Or could it have something to do with ignition? Thanks!
Grinding when starting
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Did your old starter have alignment pins that the mounting bolts went through? Did you have these alignment pins on your replacement starter or did you transfer these pins to your replacement starter prior to install ?
I don’t remember any pins at all. But one of the bolts did get slightly stripped during the process. Maybe this bolt is getting loose or wasn’t able to bolt in all the way?
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Something like this happened on my 89 trooper and one of the two bolts that hold the starter to the trans housing had come out so the engagement was off. Torqueing it down it fixed my problem. Might not be your issue but it's easy to check. In the haynes manual, "check the mounting bolts" was actually listed as a possible remedy to troubleshooting a starter grinding noise.
Mike
Mike
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I am no expert, but #1 a few Isuzu diagrams from the factory manual show 2 hollow tube type pins to align the starter ( and take some load ) that the 2 starter bolts go through. The transmission to block also follow this alignment pin / bolt up concept. Many people do not notice, lose, or do not transfer the factory pins to replacement starter or transmission and it causes a hole new line of problems down the line. #2 there should be a tin shield installed before starter is bolted in. Again i am no expert, but possibly the thickness of this shield has some effect on spacing from flywheel / block when starter is bolted in. #3 any of these issues and your possibly stripped bolt issue can cause bushings in starter nose gear to wear out from miss alignment... it might seem good at first but eventually starter gear becomes sloppy. I have experienced all these problems recently as i am working on 2 troopers right now ( a 2000 and a 2001 ) doing transmission replacements. Both troopers have come to me after several other people before me took these vehicles apart. Possibly many times since original factory build. shade tree mechanics and pro mechanics often lose or leave out parts, alignment pins, and strip bolts. I try to take my time and put in every part as per original factory build. Finding new parts is becoming almost impossible, but this blog has helped me source used parts from other members. Wanted to buy ad. Some alignment pins i have had to have made on a lathe from scratch.
You can download for free factory shop manual ( 23,000 pages ) that shows some procedures but more importantly assembly diagrams that show pictorial parts as original factory some what.
This info may help it may not.
Where are the pins located. I still have my old starter so I want to make sure that I get them transferred. When I removed the old starter there was no metal plate that came out with the old one..I just still don’t understand why cranking it for a less amount of time makes the grinding noise stop. I feel like if it was misaligned it would grind no matter what.
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I am no expert.
From the diagram i had seen, alignment pins, are like barrels or tubes, around bolts that hold on starter.
They look to index in starter case about 1/8 inch and index in block about 3/8 inch. Total alignment pin length about 1/2 inch total, inside hole slip fit on bolt, outside diameter to fit recess in cases, i have had to have these made in steel by a guy with a lathe , as they are pretty much unavailible to find or buy.
As for the tin shield between starter and block, mine is bolted to block with 2, 10mm head bolts. First then starter installed. I have gone all the way installing starter and electrical, only to have to back up remove it all and install shield first. When i was younger, and others , probably would have just said screw it and leave it out.
Most of the troopers i get to work on are broken needing repairs and always, someone else has been into them before i got them. It is common to find missing parts " like these tin shields ", missing or stripped bolts, missing alignment pins, and electrical plugs broken , spliced, or cut.
I am no expert.. hope this helps.
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