She's a squealer...
#1
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She's a squealer...
Pamela just started doing this wierd thing... if I floor it moderately to very hard, whenever she hits 4,000 RPMs I get a high squealing noise. Sort of like belt slippage. Not the nails-in-a-jar sound of predet, but '78-detroit-power-steering-belt-worn-raw sort of Stuka squeal. Once I'm up to speed it vanishes.
Suggestions on what to look for??
Suggestions on what to look for??
#2
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I get that too. I thought it was a noise from the fan......unless it is the belt on the fan, with the fan clutch being dead.
Only difference with mine, is that it will keep going with RPMS. From 4000 - 8000, it will stay squealing.
Which belt is it, people?
Only difference with mine, is that it will keep going with RPMS. From 4000 - 8000, it will stay squealing.
Which belt is it, people?
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Can you duplicate it while revving the car under the hood? Have a friend rev it to 4g and listen. I doubt throwout/pilot bearing.
Likely belt slippage, alt. bearing, water pump bearing, air pump.
If (!!!!!!!) it only does it under load, then check for exhaust backpressure. I saw a Pathfinder once that had plugged cat, it would squeal like mad under load at exactly 3-3200 rpm. The exhaust gas was pushing back toward the engine and escaping through the gasket at the flange where the cat bolted to the pipe. That was a weird one!
Likely belt slippage, alt. bearing, water pump bearing, air pump.
If (!!!!!!!) it only does it under load, then check for exhaust backpressure. I saw a Pathfinder once that had plugged cat, it would squeal like mad under load at exactly 3-3200 rpm. The exhaust gas was pushing back toward the engine and escaping through the gasket at the flange where the cat bolted to the pipe. That was a weird one!
#5
Ryan
maybe the fan, take it off but careful of the temp. see what happens. then R&R belts. see what happens. oh yeah and i heard that the V-belts smooth kind tend to do that, NAPA has teethed belts... try it. good luck mantis
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I also noticed with mine, when it squeels...you get that light metal bell ringing noise.....
Which, sounds like a pulley ringing.
Whats the common ringing noise maker in a 12a?
Which, sounds like a pulley ringing.
Whats the common ringing noise maker in a 12a?
#9
Do a quick and simple test. Remove your belts and start the car up and rev it a few times. Still hear the noise? Its an engine or transmission problem problem.
Noise gone? Its in your air pump/alternator/waterpump or AC compressor or fan clutch.
Noise gone? Its in your air pump/alternator/waterpump or AC compressor or fan clutch.
#10
Lapping = Fapping
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My '83 12A fan belts squeal at 5k and higher. It's gone without the fan there so my fan clutch is going.
Also, the throwout bearing can cause a funny squeal too. It goes up in pitch with RPM, especially in 1st, then when you push in the clutch to go to 2nd, it quickly winds back down. Maybe that's more of a tranny thing though. Or both?
Also, try lowering the alt so the belt has no tension and let it run for maybe a minute. Check if the sound is still there. Be careful! Good luck.
Edit: ah, slag posted while I was typing.
Also, the throwout bearing can cause a funny squeal too. It goes up in pitch with RPM, especially in 1st, then when you push in the clutch to go to 2nd, it quickly winds back down. Maybe that's more of a tranny thing though. Or both?
Also, try lowering the alt so the belt has no tension and let it run for maybe a minute. Check if the sound is still there. Be careful! Good luck.
Edit: ah, slag posted while I was typing.
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I've the power steerin/AC/Air pumps removed, and a relatively new, low obstruction RB exhaust, so that discounts those...
I'm thinking the fan clutch might be going. The squeal is somewhat intermittent, and I noticed today the car got past the 1/2 way mark on the temp gauge for about 3 minutes.
I'm thinking the fan clutch might be going. The squeal is somewhat intermittent, and I noticed today the car got past the 1/2 way mark on the temp gauge for about 3 minutes.
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Hey Manntis, do you have a dual sheave alt belt or the yoohoo belt?? I have the A/C, air pump, etc removed and I get the exact same squeal at 4k. The one and only fan belt left is slipping on the water pump at high RPM and driving me nuts. It didn't happen when the fan belt was new but as it has worn in it started slipping and I don't want to pull it any tighter than it is already!
I'm planning to stick the 3L220 yoohoo belt on this weekend and see if it clears it up. Plenty of people swear by it so I'm hoping for good results. Otherwise I'll be trying to hunt down that Mitsubishi dual sheave mentioned in the 2nd gen forum....
..Matt
I'm planning to stick the 3L220 yoohoo belt on this weekend and see if it clears it up. Plenty of people swear by it so I'm hoping for good results. Otherwise I'll be trying to hunt down that Mitsubishi dual sheave mentioned in the 2nd gen forum....
..Matt
#17
Driven a turbo FB lately?
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Re: She's a squealer...
Originally posted by Manntis
Pamela just started doing this wierd thing... if I floor it moderately to very hard, whenever she hits 4,000 RPMs I get a high squealing noise. Sort of like belt slippage. Not the nails-in-a-jar sound of predet, but '78-detroit-power-steering-belt-worn-raw sort of Stuka squeal. Once I'm up to speed it vanishes.
Suggestions on what to look for??
Pamela just started doing this wierd thing... if I floor it moderately to very hard, whenever she hits 4,000 RPMs I get a high squealing noise. Sort of like belt slippage. Not the nails-in-a-jar sound of predet, but '78-detroit-power-steering-belt-worn-raw sort of Stuka squeal. Once I'm up to speed it vanishes.
Suggestions on what to look for??
#18
Originally posted by Cortex
Hey Manntis, do you have a dual sheave alt belt or the yoohoo belt?? I have the A/C, air pump, etc removed and I get the exact same squeal at 4k. The one and only fan belt left is slipping on the water pump at high RPM and driving me nuts. It didn't happen when the fan belt was new but as it has worn in it started slipping and I don't want to pull it any tighter than it is already!
I'm planning to stick the 3L220 yoohoo belt on this weekend and see if it clears it up. Plenty of people swear by it so I'm hoping for good results. Otherwise I'll be trying to hunt down that Mitsubishi dual sheave mentioned in the 2nd gen forum....
..Matt
Hey Manntis, do you have a dual sheave alt belt or the yoohoo belt?? I have the A/C, air pump, etc removed and I get the exact same squeal at 4k. The one and only fan belt left is slipping on the water pump at high RPM and driving me nuts. It didn't happen when the fan belt was new but as it has worn in it started slipping and I don't want to pull it any tighter than it is already!
I'm planning to stick the 3L220 yoohoo belt on this weekend and see if it clears it up. Plenty of people swear by it so I'm hoping for good results. Otherwise I'll be trying to hunt down that Mitsubishi dual sheave mentioned in the 2nd gen forum....
..Matt
What the heck is a "yoohoo" belt?
#20
8/1 Building/Drive Ratio
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Check the waterpump.
When mine went out it was making a squeeling noise very similar to a belt or brake noise.
Grab the top of the fan and try to move it back and forth, if you can move it more than half a inch or feel some play then replace the water pump.
I got one from my mazda dealer for like $40 and it took about 2 hours to put in.
But I did a electric fan at the same time
When mine went out it was making a squeeling noise very similar to a belt or brake noise.
Grab the top of the fan and try to move it back and forth, if you can move it more than half a inch or feel some play then replace the water pump.
I got one from my mazda dealer for like $40 and it took about 2 hours to put in.
But I did a electric fan at the same time