| Author |
Message |
Phil Hughes (Ferrarifixer)
Junior Member
Username: Ferrarifixer
Post Number: 143
Registered: 7-2003
| | Posted on Thursday, September 04, 2003 - 7:36 am: | |
all the 308/328 auxillary belts exc 3.2 alternator are "Gates" belts. The w/pump and alt on most are a "7M" size, and the A/C is an "11M". It could be any of them.
They have nylon strands inside, and take a "set" when left to stand a while.
The strands cause the belt to make a click noise from the pulleys, but this can be easliy isolated with a tiny squirt of WD40 or similar. The noise will go away for a while, and then come back. The only way to fix it is to replace the auxillary belts, and use the car regularly.
But it is a very common thing and not a problem other than a distraction.
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Craig Dewey (Craigfl)
Member
Username: Craigfl
Post Number: 667
Registered: 1-2001
| | Posted on Thursday, September 04, 2003 - 5:58 am: | |
When mine started clicking recently, I removed the A/C belt and it stopped. After careful examination, it looks like the two pulleys could be lined up better. I suspect the belt is climbing up the side of the groove and making the noise when cold. |
Lawrence Coppari (Lawrence)
Member
Username: Lawrence
Post Number: 758
Registered: 4-2002
| | Posted on Thursday, September 04, 2003 - 5:20 am: | |
If it were mine I'd remove all the accessory belts and start the engine. If there is no noise, put the first one on and so forth. That way you can determine which on makes the noise if, indeed, one of them is. |
Frank Parker (Parkerfe)
Advanced Member
Username: Parkerfe
Post Number: 2895
Registered: 9-2001
| | Posted on Wednesday, September 03, 2003 - 4:12 pm: | |
Paul, so you put 5k miles on your 328 in 4 months. That's great ! |
Dave328GTB (Hardtop)
Member
Username: Hardtop
Post Number: 667
Registered: 1-2002
| | Posted on Tuesday, September 02, 2003 - 5:22 pm: | |
The clicking sound on 308's and 328's when cold is almost always from the a/c belt. Don't know why but have seen this myself on several cars and heard of many others.
Dave |
Hayo (Hayo328)
New member
Username: Hayo328
Post Number: 21
Registered: 7-2003
| | Posted on Tuesday, September 02, 2003 - 4:36 pm: | |
Peter,
The waterpump on my 328 had a rebuild recently, so that can't be the soundmaker.
Belts are tensioned well also. Maybe one of the belt-pulleys is worn out to the sides and has become wider. The belts touches the bottom and starts to slip. Disappears when the rubber gets warm and gives more grip to the sides.
We can test this by measuring the clearance between belts and pulley-bottoms. If so: buy a wider belt! (waterpump: renew pulley).
Regards
Hayo. |
Peter B. (Gts308qv)
Junior Member
Username: Gts308qv
Post Number: 250
Registered: 5-2001
| | Posted on Monday, September 01, 2003 - 8:55 pm: | |
Do we know what causes the clicking sound ??
My 308 QV has the same intermittent clicking sound occasionally from cold. Yes, I have installed new belts and tensioner bearings recently. Plus the water pump has been rebuilt recently. The belts are correctly tensioned.
Any ideas other than water pump ?? |
Andrew A. Illes (Andyilles)
Junior Member
Username: Andyilles
Post Number: 187
Registered: 10-2002
| | Posted on Monday, September 01, 2003 - 8:44 pm: | |
Hayo,
Yes, belt tension will vary front to back during rotation since valve-spring tensions place different loads on the belts.. don't worry about it. When you rotate the engine, you'll see it change back and forth.. it's normal. As others have noted, do NOT retension.
The sound you're hearing could be from failing water pump bearings. There is a tube spacer between them in the pump that the shaft runs through, and when the bearings begin to wear, it flops around which can make a sound like you are describing.
Best regards,
Andy |
Hayo (Hayo328)
New member
Username: Hayo328
Post Number: 18
Registered: 7-2003
| | Posted on Monday, September 01, 2003 - 4:34 pm: | |
Ok, Thanks for the suggestions and advice!
Well, Dave: just tensioned the belt a little. It has still a free movement. But I will replace it!
Your advice maybe very true. A retensioned belt has lost its natural stretch capacity.
Paul and Scott: I forgot to rotate the engine. The next time it will be done, thanks!
Muteki: the tensioners were not replaced. The bearings did.
The tension is correct when you can turn one side the belt from horizontal to just vertical (15 minutes or 90 degrees) by using your fingers.
It did when I started driving.
Correct me please when I'm wrong about this.
Regards,
Hayo.
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308 GTS (Muteki)
New member
Username: Muteki
Post Number: 19
Registered: 8-2003
| | Posted on Sunday, August 31, 2003 - 11:20 pm: | |
I have heard the same thing as Dave. If you are having problems with the tension, the best bet is to get a set of new belt tesioners and replace the belts. They are not too expensive. Better to be safe then sorry. If one of the timing belts gives while the motor is in motion, it can be a pricey repair. |
Scott Anderson (Srandrsn)
Junior Member
Username: Srandrsn
Post Number: 178
Registered: 4-2001
| | Posted on Sunday, August 31, 2003 - 10:21 pm: | |
I just changed the belts on my car also and it was interesting how the tension was different at different points in the engines rotation. |
Dave328GTB (Hardtop)
Member
Username: Hardtop
Post Number: 663
Registered: 1-2002
| | Posted on Sunday, August 31, 2003 - 10:10 pm: | |
Hayo,
There was a thread on this subject recently that brought comments from a couple of mechanics that retensioning belts can lead to belt failure. Also, the workshop manual also mentions that retensioning even just once can lead to failure.
Dave |
Paul Jeffery (Peajay)
Junior Member
Username: Peajay
Post Number: 125
Registered: 4-2002
| | Posted on Sunday, August 31, 2003 - 2:57 pm: | |
Hayo try rotating the engine and checking again, I have noticed that there is quite a big difference depending on whether the valve train is under load or not. I also noticed that the left side (rear) belt seems to be looser than the front on my 328 when I did the belt change a couple of months ago. |
Hayo (Hayo328)
New member
Username: Hayo328
Post Number: 16
Registered: 7-2003
| | Posted on Sunday, August 31, 2003 - 2:45 pm: | |
Today I investigated the course of a clicking sound when starting my 328 from cold. It disappears after a few minutes. Suppose its coming from sticking waterpump or alternator belts.
I even checked the cam-belt on the left side of the waterpump (easy to reach).
The cam-belts are new (4 months and 5 K.
I set the tension properly at that time.
Tension on the right side belt OK. Left side tension was much looser. Not dangerous, but I decided to slacken the tensioner and set it again.
Any ideas what makes the belt stretch so much? Is this normal? The cams are rotating smooth and not sticking.
Hayo.
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