Screech on start up

[WizzEssex]

Hi guys- can anyone advise- very very occasionally I get a kind of 'screech' on start up lasting only a second or so when I turn the key- then disappears- engins runs beautifully- quiet-no problems...
any thoughts ????
Thanks

 

[deka]

possibly the bearings in the starter motor or maybe a slipping belt... alternator?

I would say a loose belt

 

[fixit man]

Hi guys- can anyone advise- very very occasionally I get a kind of 'screech' on start up lasting only a second or so when I turn the key- then disappears- engins runs beautifully- quiet-no problems...
any thoughts ????
Thanks

Yes that sounds like the starter motor..sticky pinion gear , the starter gear is thrust into the flywheel gear(by a solenoid)to crank the engine , then when you realease the Ign. key it disengages from the flywheel gear by spring force If it's slow disengaging due to dirt/grease on the shaft the engine drives the motor causing that screech.

 

[docttor999]

I am getting this problem intermittently, will the starter motor eventually pack up?

 

[Stuart Truman]

It could be a belt tensioner too. Hopefully that as it would be cheaper than a starter motor!

 

[ranski]

As above probably the starter motor

However many of us get this but it only occurs on cold days

http://www.z4-forum.com/forum/viewtopic.php?t=35539

 

[McKoval]

Yes, I've also noticed that, only on cold or very humid days. i also think its a starter motor.

TapaTalking

 

[Mitch89]

Sound like this?

[youtube]5MmgKdQVbTY[/youtube]

For me it was the starter motor. Replaced and all good now.

 

[IvanDobskey]

Yep, sounds like another problem I've had :roll:

Tried lubricating the shaft (ahem) but didn't make any difference. In the end I got the starter motor replaced with a nice Bosch one (only cost me £135 total so not too bad). No more screeching on start up