Clunk and not starting

Technical questions and answers about the Mazda Bongo

Moderators: Doone, westonwarrior

Post Reply
skinnyman
Apprentice Bongonaut
Posts: 2
Joined: Tue May 14, 2019 5:42 pm

Clunk and not starting

Post by skinnyman » Tue May 14, 2019 6:55 pm

Hi all.
Had my Bongo (2.5TD 1995 4WD auto) a couple of years now and it has pretty much always started and ran great. I had to leave it sat static for the last few months though and the battery went flat so it wouldn't start.

It has only gone flat one other time and then a quick jump start sorted it - but not this time. The battery didn't seem to be holding charge so I replaced it.

That helped and each time I turned the key afterwards the dash lights came on and I got a single clunk but nothing more. That sounded like a starter motor problem so I swapped it out for another from eBay.

https://www.ebay.co.uk/itm/FITS-MAZDA-B ... SwYIxX2Tdx

That didn't make any difference and I still have the same problem. I've tried starting in Park and Neutral but no difference. I know the clunk is coming from the starter motor because if I place my hand on it when turning the key I can feel the clunk as it happens.

I've seen posts on here about relays, filters and inhibitor switches causing starting issues but not sure what I should be looking at next. Any thoughts?

Thanks :)
User avatar
Bob
Supreme Being
Posts: 13362
Joined: Wed Oct 17, 2007 12:54 pm
Location: North Somerset

Re: Clunk and not starting

Post by Bob » Tue May 14, 2019 7:08 pm

Immediate thought is a flat battery.

Is the replacement new, have you charged it?

I'd certainly try jump leads or a booster pack before looking further. :wink:

Good luck.
Alcohol won't solve your problems, but neither will milk.

https://m.youtube.com/watch?v=hcF9JSxkUSE
skinnyman
Apprentice Bongonaut
Posts: 2
Joined: Tue May 14, 2019 5:42 pm

Re: Clunk and not starting

Post by skinnyman » Wed May 15, 2019 9:01 am

Thanks Bob.

Yes, replacement battery is brand new and charged. Tried jump leads too but still the same - a single clunk then nothing. :?

The inhibitor switch sounds plausible as it doesn't even try to turn over so I guess I'll start with that.
teenmal
Supreme Being
Posts: 3387
Joined: Thu Mar 27, 2008 6:08 pm
Location: north lanarkshire

Re: Clunk and not starting

Post by teenmal » Wed May 15, 2019 11:05 am

Before you bankrupt yourself I would disconnect the battery then make sure " manually " that the engine does in fact Turn.


Take care
User avatar
Tony x
Tribal Elder
Posts: 507
Joined: Mon Jan 28, 2013 5:23 pm
Location: Taunton

Re: Clunk and not starting

Post by Tony x » Thu May 16, 2019 2:06 pm

I'd replace the starter motor solenoid. There are two types depending on if you have the winter pack or not but both are replaceable. Symptoms of a failed solenoid are a clunk on turning the key but the motor not spinning.
You have to remove the starter motor to replace the solenoid (you can just about replace the solenoid without removing the starter if you have the more powerful starter that comes with the winter pack) so you could check if the starter spins off the vehicle.
Cost is around £30 ish
teenmal
Supreme Being
Posts: 3387
Joined: Thu Mar 27, 2008 6:08 pm
Location: north lanarkshire

Re: Clunk and not starting

Post by teenmal » Thu May 16, 2019 2:27 pm

Tony x wrote:
Thu May 16, 2019 2:06 pm
I'd replace the starter motor solenoid. There are two types depending on if you have the winter pack or not but both are replaceable. Symptoms of a failed solenoid are a clunk on turning the key but the motor not spinning.
You have to remove the starter motor to replace the solenoid (you can just about replace the solenoid without removing the starter if you have the more powerful starter that comes with the winter pack) so you could check if the starter spins off the vehicle.
Cost is around £30 ish

The OP,has changed the starter motor …



That helped and each time I turned the key afterwards the dash lights came on and I got a single clunk but nothing more. That sounded like a starter motor problem so I swapped it out for another from eBay.

https://www.ebay.co.uk/itm/FITS-MAZDA-B ... SwYIxX2Tdx

That didn't make any difference and I still have the same problem. I've tried starting in Park and Neutral but no difference. I know the clunk is coming from the starter motor because if I place my hand on it when turning the key I can feel the clunk as it happens.
User avatar
jimmo62
Bongolier
Posts: 298
Joined: Sat Jan 11, 2014 6:54 pm
Location: Bristol

Re: Clunk and not starting

Post by jimmo62 » Thu May 16, 2019 5:41 pm

Had something similar in an old Triumph Stag - turned out the starter ring on the flywheel had damaged teeth so the starter gear could not engage properly when the solenoid operates. You could try turning the engine over a bit by hand and see if the starter then engages. Also might be worth taking the starter motor off and have a look into the hole to see the starter ring is OK
rita
Supreme Being
Posts: 3100
Joined: Tue Sep 15, 2009 7:11 pm

Re: Clunk and not starting

Post by rita » Fri May 17, 2019 8:10 am

jimmo62 wrote:
Thu May 16, 2019 5:41 pm
Had something similar in an old Triumph Stag - turned out the starter ring on the flywheel had damaged teeth so the starter gear could not engage properly when the solenoid operates. You could try turning the engine over a bit by hand and see if the starter then engages. Also might be worth taking the starter motor off and have a look into the hole to see the starter ring is OK


You can check the Ring gear without taking the starter motor off,just remove the cover inside the cab at the rear of the engine.
Post Reply