Squealing from Engine Bay!

CHC (RIP) · October 23, 2010, 10:01:23 PM

Tightened fan belt on JAZ and when the engine idols - no problem, it sounds nice and sweet. If the engine is revved there is a squealing sound!
Bling! ...... my 1st thought was that I had tightened the belt too tight, so I slackened it off but no change.
So today I\'ve changed the Water Pump for a new one - that will stop it - NO!
So was this a wasted day or what?

Any ideas what might be causing the squealing?
Is it possibly a serious issue?
Suggestions please guys.

Cliff
:3Confused

captainbizzaro · October 23, 2010, 10:03:24 PM

Could be alternator bearing

syebba · October 23, 2010, 10:04:51 PM

Did it squeal before u tightened fan belt?

Ian65 · October 23, 2010, 10:05:04 PM

are you running the standard viscous fan?

CHC (RIP) · October 23, 2010, 10:08:10 PM

When I bought JAZ it was a non runner - needed battery so cannot say.

Yes it is running the standard viscous fan.

Ian65 · October 23, 2010, 10:10:09 PM

my money is on the viscous coupler then, they go bad, load the engine and when the egine revs up the belt can\'t turn the weight of the fan fast enough and the belt squeals

CHC (RIP) · October 23, 2010, 10:11:15 PM

Alternator bearing - hmmm ... never thought of that.
Wouldn\'t this squeal though even when idling?

CHC (RIP) · October 23, 2010, 10:12:59 PM

Quote from: Ian65;722744my money is on the viscous coupler then, they go bad, load the engine and when the egine revs up the belt can\'t turn the weight of the fan fast enough and the belt squeals

Quickest way to test for this being ..... remove the fan for a few minutes I would think?

captainbizzaro · October 23, 2010, 10:13:13 PM

Mine didn\'t when it expired

captainbizzaro · October 23, 2010, 10:16:09 PM

Yeah I would just remove the fan belt, eliminate the main engine and that only leaves three things!

Ian65 · October 23, 2010, 10:17:28 PM

Quote from: CHC;722746Quickest way to test for this being ..... remove the fan for a few minutes I would think?

correct! undo the 4no 10mm bolts that hold on the viscous coupler and rev it up...
while the fan is off, give the car a quick spin up the road, it won\'t overheat as long as you keep moving and you\'ve got airflow.... you\'ll be amazed at how much quieter and more responsive the engine is without that big heavy fan on it.

There is a trick you can do to fix the viscous coupler, I put it in this thread a while back...

http://mazdarotaryclub.com/forums/showthread.php?t=63089

CHC (RIP) · October 23, 2010, 10:20:38 PM

So tomorrow it will be:-

Option 1 - Without fan belt

Option 2 - Without fan

CHC (RIP) · October 23, 2010, 10:23:01 PM

Quote from: Ian65;722750correct! undo the 4no 10mm bolts that hold on the viscous coupler and rev it up...
while the fan is off, give the car a quick spin up the road, it won\'t overheat as long as you keep moving and you\'ve got airflow.... you\'ll be amazed at how much quieter and more responsive the engine is without that big heavy fan on it.

There is a trick you can do to fix the viscous coupler, I put it in this thread a while back...

http://mazdarotaryclub.com/forums/showthread.php?t=63089

I\'ll have to test it static as the car is sorn

syebba · October 23, 2010, 10:24:09 PM

Dose\'nt take long to get help round this place!
Problem posted 10.01pm,diagnosis complete by 10.17pm.

CHC (RIP) · October 23, 2010, 10:29:24 PM

Quote from: Ian65;722750correct! undo the 4no 10mm bolts that hold on the viscous coupler and rev it up...
while the fan is off, give the car a quick spin up the road, it won\'t overheat as long as you keep moving and you\'ve got airflow.... you\'ll be amazed at how much quieter and more responsive the engine is without that big heavy fan on it.

There is a trick you can do to fix the viscous coupler, I put it in this thread a while back...

http://mazdarotaryclub.com/forums/showthread.php?t=63089

Good information (as ever) on how to test/service the coupler - will see how I get on tomorrow and let you know.

:cheers