Squeal when under load. Especially when high RPM shifting. (audio included)
#1
Junior Member
Thread Starter
Squeal when under load. Especially when high RPM shifting. (audio included)
Here's an audio bite of the sound my RX7 is making. Under light throttle it's not present but with spirited driving or full throttle up into 4th gear. Haven't driven it over 65MPH so not sure if it will do it at high RPM in 5th under load. In the audio clip you can hear it even just faintly at the top of 3rd. I could have made it squeal a lot more, this was about 3/4 throttle and stopped at about 4,900 RPM.
Squeal!
Thoughts? Release bearing? Slipping clutch. Doesn't feel like it's slipping. Sounds like it comes from the front of the car the most.
5-speed/12A/carb'd/'85 stock GS (A/C removed)
Squeal!
Thoughts? Release bearing? Slipping clutch. Doesn't feel like it's slipping. Sounds like it comes from the front of the car the most.
5-speed/12A/carb'd/'85 stock GS (A/C removed)
Last edited by phixer; 06-09-18 at 05:11 PM. Reason: better title
#3
JDM Junkie
iTrader: (5)
Yep I would agree with this.
Super easy one to check - tighten your belt a fraction and see if it happens less/stops entirely. Only tighten a little though, you don't want to over tighten that belt and put pressure on the bearings. Unfortunately it's a bit of a crap shoot on the first gens with the old pry bar method....
Recommend getting one of these if you haven't already:
Banzai Racing Alternator Bracket Kit (79-91 RX-7)
Tom
Super easy one to check - tighten your belt a fraction and see if it happens less/stops entirely. Only tighten a little though, you don't want to over tighten that belt and put pressure on the bearings. Unfortunately it's a bit of a crap shoot on the first gens with the old pry bar method....
Recommend getting one of these if you haven't already:
Banzai Racing Alternator Bracket Kit (79-91 RX-7)
Tom
#6
Junior Member
Thread Starter
Thanks! Looking forward to good results. Got a belt for the air pump this evening, the alternator belt was out of stock. Those are my only two. Looked closer at the air pump belt, almost completely failed in spots, yikes!
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#8
Junior Member
Thread Starter
#9
Junior Member
Thread Starter
#10
Junior Member
Thread Starter
The air pump belt is shot and slipping. I don't see where to losen/tighten anything to get the belt off. Im also assuming the fan has to come off first?
My first time working on an RX-7.
My first time working on an RX-7.
#11
ancient wizard...
12mm pivot bolt on topside of air pump. 12mm adjustment bolt 180 degrees from top bolt. feel with your hand down on front bottom of air pump for bolt. Use mirror if can't see bolt.
Loosen pivot bolt about a turn,loosen adjustment bolt til you can slide air pump over in its bracket,slip belt off. Belts can be removed and replaced without removing fan.
One belt at a time remove from pulleys and feed over/into/around fan blades while turning fan by hand to free belt. Reverse process to install.
Correct belt tension is about a thumbwidth or 13mm or 1/2" deflection on longest run of belt,both alternator and air pump. No need for belts to be tighter than that. After couple hundred miles of run in,belts will stretch some and need to be retensioned to same spec at which point they'll hold their adjustment.
Good idea to spin alternator,water pump and air pump pulleys while belts are off and feel for any roughness/notchiness in them.
Bolts for air pump and alternator will be very tight if not been loosened in some time. Particularly on air pump bolts,use 6 point socket,extension,ratchet when breaking loose 1st time.
Loosen pivot bolt about a turn,loosen adjustment bolt til you can slide air pump over in its bracket,slip belt off. Belts can be removed and replaced without removing fan.
One belt at a time remove from pulleys and feed over/into/around fan blades while turning fan by hand to free belt. Reverse process to install.
Correct belt tension is about a thumbwidth or 13mm or 1/2" deflection on longest run of belt,both alternator and air pump. No need for belts to be tighter than that. After couple hundred miles of run in,belts will stretch some and need to be retensioned to same spec at which point they'll hold their adjustment.
Good idea to spin alternator,water pump and air pump pulleys while belts are off and feel for any roughness/notchiness in them.
Bolts for air pump and alternator will be very tight if not been loosened in some time. Particularly on air pump bolts,use 6 point socket,extension,ratchet when breaking loose 1st time.
#12
seniorchief
If you are having problems finding RX-7 parts Amazon is a good place to check, especially with all the third-party vendors that utilize the site. Last summer I picked-up a Wells Throttle Position Sensor for my GSL-SE that typically runs about around $286.00 for $27.54 from some wholesaler that was probably just trying to clear out old stock.
#13
Junior Member
Thread Starter
OMG, I'm so silly. I didn't see the adjustment bolt at the bottom of the air pump. Until I got my 1000 lumen light, LOL.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
#14
Junior Member
Thread Starter
OMG, I'm so silly. I didn't see the adjustment bolt at the bottom of the air pump. Until I got my 1000 lumen light, LOL.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan and fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan and fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
#15
ancient wizard...
OMG, I'm so silly. I didn't see the adjustment bolt at the bottom of the air pump. Until I got my 1000 lumen light, LOL.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan and fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
The Autozones around me have RX7 guys, turns out they kept a few belts in stock
Too bad my fan is like Bakelite plastic doody! I touch and it breaks apart. Guess I should get a new fan and fan clutch before the fan disintegrates. Clutch is probably all viscous-ed out.
#16
Junior Member
Thread Starter
12mm pivot bolt on topside of air pump. 12mm adjustment bolt 180 degrees from top bolt. feel with your hand down on front bottom of air pump for bolt. Use mirror if can't see bolt.
Loosen pivot bolt about a turn,loosen adjustment bolt til you can slide air pump over in its bracket,slip belt off. Belts can be removed and replaced without removing fan.
One belt at a time remove from pulleys and feed over/into/around fan blades while turning fan by hand to free belt. Reverse process to install.
Correct belt tension is about a thumbwidth or 13mm or 1/2" deflection on longest run of belt,both alternator and air pump. No need for belts to be tighter than that. After couple hundred miles of run in,belts will stretch some and need to be retensioned to same spec at which point they'll hold their adjustment.
Good idea to spin alternator,water pump and air pump pulleys while belts are off and feel for any roughness/notchiness in them.
Bolts for air pump and alternator will be very tight if not been loosened in some time. Particularly on air pump bolts,use 6 point socket,extension,ratchet when breaking loose 1st time.
Loosen pivot bolt about a turn,loosen adjustment bolt til you can slide air pump over in its bracket,slip belt off. Belts can be removed and replaced without removing fan.
One belt at a time remove from pulleys and feed over/into/around fan blades while turning fan by hand to free belt. Reverse process to install.
Correct belt tension is about a thumbwidth or 13mm or 1/2" deflection on longest run of belt,both alternator and air pump. No need for belts to be tighter than that. After couple hundred miles of run in,belts will stretch some and need to be retensioned to same spec at which point they'll hold their adjustment.
Good idea to spin alternator,water pump and air pump pulleys while belts are off and feel for any roughness/notchiness in them.
Bolts for air pump and alternator will be very tight if not been loosened in some time. Particularly on air pump bolts,use 6 point socket,extension,ratchet when breaking loose 1st time.
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