starter motor squeely sound

2003 - 2009, roadster, coupe, facelift
Post Reply
Magicarcher
Member
Member
Posts: 178
Joined: Fri Jun 17, 2016 9:12 pm

starter motor squeely sound

Post by Magicarcher » Mon Nov 13, 2017 1:24 pm

I have noticed when I start my Z4 (which turns over and starts fine), the second it fires and I return the key to ignition position I get a squeely sound for one or two seconds, which I am thinking is the starter motor but not sure. It happens consistently. does anyone else get this or have any idea what it could be. The car is low mileage but 12 years old.
Z4 3.0L 2005.

User avatar
ph001
Member
Member
Posts: 562
Joined: Mon Oct 31, 2016 5:53 pm
Location: N. Yorkshire.

starter motor squeely sound

Post by ph001 » Mon Nov 13, 2017 2:15 pm

If it’s a squeel sound it’s more likely the aux belt slipping slightly on the alternator pulley. When you start the car you take a big load off the battery which in turn puts a big load on the alternator for a few seconds as it dumps current into the battery. The belt is automatically tensioned so you can’t really adjust it but the belt should be changed if still on it’s original at 12 yrs old.

The starter sticking is more like a grindy kind of squarwk...bit hard to describe. That is fairly common too. Can you do a youtube vid of the noise?
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual.

User avatar
Steve84N
Senior Member
Senior Member
Posts: 1483
Joined: Tue Jul 21, 2015 1:00 pm

starter motor squeely sound

Post by Steve84N » Tue Nov 14, 2017 11:37 am

I think it's the solenoid not disengaging quickly enough so for a split second the engine spins the motor very quickly causing a screeching sound. Probably fine for a while yet but you can replace the starter if you're worried.
3.0si Coupe | Quaife Torsen | B12 | H&R ARBs | Vibratech Engine Mounts | Weichers Strut Brace | 10mm Spacers | Whiteline Poly Offset LCA Bushes | RTAB Limiters | Grom USB3

User avatar
ph001
Member
Member
Posts: 562
Joined: Mon Oct 31, 2016 5:53 pm
Location: N. Yorkshire.

starter motor squeely sound

Post by ph001 » Tue Nov 14, 2017 11:44 am

If it turns out to be the starter solenoid - it can be cleaned out fairly easily. No need to replace.
Last edited by ph001 on Tue Nov 14, 2017 2:03 pm, edited 1 time in total.
2007 E85 Z4 3.0Si manual :driving:
19" CSL's | Eibach Springs | Aeroskirts | Z4M front bumper | Clear brake light | ZHP | RCH+| Stubby

2004 E46 M3 coupe manual.

MACK
Senior Member
Senior Member
Posts: 2041
Joined: Mon Jun 15, 2015 11:38 am
Location: Manchester

starter motor squeely sound

Post by MACK » Tue Nov 14, 2017 12:52 pm

Steve84N wrote:
Tue Nov 14, 2017 11:37 am
I think it's the solenoid not disengaging quickly enough so for a split second the engine spins the motor very quickly causing a screeching sound. Probably fine for a while yet but you can replace the starter if you're worried.
+1
Mine does this occasionally. Maybe one in ten starts. I'm not rushing to replace it just yet I'll wait till it's much more prevalent. Then I'll take it off and try freeing it up a bit rather than replace the whole thing. There not that hard to remove providing you can access it. If not it's a easy job for a garage to remove and like I said I'd try a bit of spray etc to free it off before replacing.
05 3.0i SE in Titanium.
Mods inc - Facelift Xenons, M Sport Wheel & Leather Elec/Heated Seats, 15 & 20mm Spacers & M Tyre Sizes. 3M Carbon Fibre Trim, 4 Spot Clear Rear Lights, Gaptech+, Cruise, MM Tips, ZHP, Stubby.

Magicarcher
Member
Member
Posts: 178
Joined: Fri Jun 17, 2016 9:12 pm

starter motor squeely sound

Post by Magicarcher » Tue Nov 14, 2017 7:35 pm

Thanks for all the help. I found a youtube video that "shows" how it sounds (only need to listed to the first 12 seconds) https://www.youtube.com/watch?v=eJ9qnnf2kWU. Mine doesn't sound as bad as this, but it happens most times. Sounds like Steve84N is likely to be right.
Z4 3.0L 2005.

User avatar
David
Member
Member
Posts: 105
Joined: Thu Mar 03, 2016 8:01 pm

starter motor squeely sound

Post by David » Tue Nov 14, 2017 7:59 pm

Magicarcher wrote:
Tue Nov 14, 2017 7:35 pm
Thanks for all the help. I found a youtube video that "shows" how it sounds (only need to listed to the first 12 seconds) https://www.youtube.com/watch?v=eJ9qnnf2kWU. Mine doesn't sound as bad as this, but it happens most times. Sounds like Steve84N is likely to be right.
Yep, I used the same video to help me out. My starter motor was a Denso BMW one. Took it apart, degreased in and re-greased it and all is fine now :thumbsup:

I used GUNK degreaser, some electrical connector cleaner (for the circuit) and then some Lith-Moly grease - all from Halfords.

You’ll need some external circlip pliers for one circlip. You can get these from Halfords too.
8069F4A1-B0CB-4417-B113-5DAEE72963D9.jpeg
8069F4A1-B0CB-4417-B113-5DAEE72963D9.jpeg (422.13 KiB) Viewed 45 times

Magicarcher
Member
Member
Posts: 178
Joined: Fri Jun 17, 2016 9:12 pm

starter motor squeely sound

Post by Magicarcher » Tue Nov 14, 2017 8:05 pm

Thanks David useful picture. Is it easy to get off the car?
Z4 3.0L 2005.

User avatar
David
Member
Member
Posts: 105
Joined: Thu Mar 03, 2016 8:01 pm

starter motor squeely sound

Post by David » Wed Nov 15, 2017 8:45 am

Magicarcher wrote:
Tue Nov 14, 2017 8:05 pm
Thanks David useful picture. Is it easy to get off the car?
I removed my starter from my 3.0si while the manifold was out for other reasons.

However, others have had success removing it with the manifold in situ. Definitely a squeeze but doable, so I’m told.

This makes it sound a lot easier than it actually is:

- Disconnect battery
- Disconnect the starter electrical connector
- Disconnect the bolted on thick cable/plate
- Undo two torx bolts that hold the starter in place - one from the front, one long bolt from the rear.
- Slide starter motor towards front of car and remove

Note: Be mindful of the crankshaft sensor and connector that sits right below the starter motor!!! If this is knocked and dislodged you will lose power steering and ABS, and the car will not want to start. Ask me how I know... :rofl:


David

Post Reply

Who is online

Users browsing this forum: Bing [Bot], Danz4coupe, Google [Bot], Z4LEE and 22 guests