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Topic: Project Elimination: The Mysterious Underhood Chirping (Read 7619 times) previous topic - next topic

Project Elimination: The Mysterious Underhood Chirping

Reply #30 –
How would I go about adding the tension then? When I pull one way on the nut, it breaks loose, and when I go the other way on the nut, the whole tensioner moves, and belt becomes limp. I guess I should also ask...is this tensioner something I can buy at an Autozone type place?
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
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Project Elimination: The Mysterious Underhood Chirping

Reply #31 –
Pull on the bolt the way it comes loose but not hard enough to make it come loose.  If it comes loose that easily, the pulley might be a source of the chirping.

I just search AAP online.  They seem to have new tensioner assemblies.  They start at about $60.  So check your tensioner the way I described and also without the belt on for side to side play before shelling out that kind of money for something that won't fix the noise.

Project Elimination: The Mysterious Underhood Chirping

Reply #32 –
There should be a square hole that a 1/2" ratchet or extention fits into. Use that to add additional tension, I'd be careful when doing that though. I wouldn't loosen the bolt that attaches the whole tensioner to the engine. Just my .02

Afterthought, I don't remember an actual tensioner on my 2.3t, there was an idler pulley though and belt tension when adjusted by either the alternator or the a/c compressor itself. I didn't have a serp belt, I had v-belts.


John


86' T/C 4.6L DOHC
16' Chebby Cruze 1.4L Turbo
17’ Peterbilt 389 600hp 1850ftlb Trq 18spd

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“Heavy Metal Mistress”
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Project Elimination: The Mysterious Underhood Chirping

Reply #33 –
Clutch air gap adjustment from the '84 shop manual. Probably not the same compressor that you have but the idea is the same.

This first picture shows where the shims are. What I called the clutch disc, they call the hub.

The second picture shows where to check the air gap with a feeler gauge.

I could have shrunk it down, but thought you may be intertested in the rest of the stuff on the page.



Project Elimination: The Mysterious Underhood Chirping

Reply #34 –
That's the HR980.

softtouch, where did you get the jpg?

Project Elimination: The Mysterious Underhood Chirping

Reply #35 –
Ok, using the feeler gauge, I determined the gap between the Hub and mating surface is approx. .047 inches. It was a snug fit.

What does this mean?
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
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Project Elimination: The Mysterious Underhood Chirping

Reply #36 –
Quote from: JeremyB;172156
That's the HR980.

softtouch, where did you get the jpg?


I scanned it from the '84 shop manual for all rear wheel drive FMC cars.
It covers compressor models FS-6, HR-980 and 6P148.

Project Elimination: The Mysterious Underhood Chirping

Reply #37 –
Quote from: DMC24guy;172179
Ok, using the feeler gauge, I determined the gap between the Hub and mating surface is approx. .047 inches. It was a snug fit.

What does this mean?


All three of the compressors in the '84 shop manual have a clutch hub to pulley air gap of .021"-.036" .

I do not know what compressor you have but it looks like your air gap is too wide.

Project Elimination: The Mysterious Underhood Chirping

Reply #38 –
What should my next step be? Would this gap cause the chirping?

(HR980)
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
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Project Elimination: The Mysterious Underhood Chirping

Reply #39 –
Quote from: DMC24guy;172192
What should my next step be? Would this gap cause the chirping?

(HR980)


I think this can cause it to chirp.
Yes you should reduce the shim thickness. I don't know how thick the shims are.
It looks like the tricky part is holding the compressor shaft from turning when you loosen and tighten the nut.

Project Elimination: The Mysterious Underhood Chirping

Reply #40 –
What I can't figure out is why it started in the first place...if it is the Gap problem. It never chirped before, and then about 2 months ago, it started. If the gap is too wide....how could it have...grown? Seems a little peculiar to me.
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
[/SIZE]

Project Elimination: The Mysterious Underhood Chirping

Reply #41 –
Quote from: softtouch;172190
I scanned it from the '84 shop manual for all rear wheel drive FMC cars.
It covers compressor models FS-6, HR-980 and 6P148.

My '85 manual has tissue thin pages. If you scan it, the page behind bleeds though.


Quote from: DMC24guy
What I can't figure out is why it started in the first place...if it is the Gap problem. It never chirped before, and then about 2 months ago, it started. If the gap is too wide....how could it have...grown? Seems a little peculiar to me.

The air gap may/may not the the source of your problem, but it is out of spec so you need to correct it to rule it out the trade space. Every time the clutch engages, there is a tiny bit of wear. Over years the gap grows. At some point, the clutch's ability to grab will be overwhelmed and slipping will commence.

Project Elimination: The Mysterious Underhood Chirping

Reply #42 –
Ok, tomorrow I will attempt to remove one of the Shims and see if that helps any.
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
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Project Elimination: The Mysterious Underhood Chirping

Reply #43 –
Well guy, I think I may have found the source of the squeaking. I shot a ton of Wd-40 into the back of the tensioner wheel, turned the A/C on, and the squeak was gone. So, does this mean I don't have to buy the whole tensioner...just the pulley wheel?
<---One must always remember to Remain cool, calm and collected when dealing with your fellow man, especially on the Internet....
-DMC24guy
[/SIZE]

Project Elimination: The Mysterious Underhood Chirping

Reply #44 –
Yup.

As an aside, my HR980 has an air gap of .04x and clutches just fine.