EA81 exhaust buzz
- Silverbullet
- Senior Member
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- Location: Adelaide
EA81 exhaust buzz
Recently the old EA81 has developed a weird "buzz" noise at certain rev ranges. It used to do it in a very limited rev range so it was short and barely noticeable. But yesterday when my clutch started slipping because of no free play the buzz came in at a wider rev range and alot louder. Adjusted the free play in but the buzz is now in 2 different rev ranges and bloody annoying! The noise definitely comes from the rear of the car/tailpipe from what I can hear on the inside.
What could I be looking at then, loose connection? Loose mounting? Where the two pipes join midway doesn't have the correct gasket in it, after I bought that gasket 3 times and had to take the exhaust apart 3 times I just cut a piece of cork mat and put lots of RTV on it and it was fine...perhaps that is starting to leak?
What could I be looking at then, loose connection? Loose mounting? Where the two pipes join midway doesn't have the correct gasket in it, after I bought that gasket 3 times and had to take the exhaust apart 3 times I just cut a piece of cork mat and put lots of RTV on it and it was fine...perhaps that is starting to leak?
Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
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-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
maybe a loose baffle in the exhaust.
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Current
00 Outback with class, SOHC EJ25 auto 240,068ks
"B1" 90 Brumby with character 271,800K EA81 (But soon 5speed,103,000k EJ202)
"B2" wrecked and crushed
"B3" 89 Bush Bashing Brumby (BeeRumBee) Kept a Bucca
"B4" 89 Black Brumby (wam balam ) Kept at Kempsey
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Current
00 Outback with class, SOHC EJ25 auto 240,068ks
"B1" 90 Brumby with character 271,800K EA81 (But soon 5speed,103,000k EJ202)
"B2" wrecked and crushed
"B3" 89 Bush Bashing Brumby (BeeRumBee) Kept a Bucca
"B4" 89 Black Brumby (wam balam ) Kept at Kempsey
"B5" 92 Brumby (sold it)
"B6" 88 Beige Brumby
"W1" 83 wagon 308,000 AC and alot of rust repairs. (Wanda)
Brumby Trailer (Sulky)
LUV THAT BRUM !
RevMax Hobbies
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- steptoe
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then there is the spare wheel mounting bracket that breaks away from the firewall squeak, buzz affecting clutching to - where the stay bracket mounts to firewall. Also for the loose baffle in the muffler diagnosis. I guess if you get it checked by a muffler joint hinting that you want/need a 2" inch exhaust from y pipe back - they may be able to help rule things out.
- Silverbullet
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- Location: Adelaide
Hmm ok so loose baffle sounds possible since the noise is at the rear, I'll start looking for another rear exhaust section. Will check for cracks also cheers Bennie.
Jonno yes a 2 inch Y pipe back setup is on the list along with everything else When you say stay bracket do you mean that rod going from the firewall to flywheel housing? That might need adjusting like the clutch did, how do I know when it's right? should it be tight or loose?
Cheers
Jonno yes a 2 inch Y pipe back setup is on the list along with everything else When you say stay bracket do you mean that rod going from the firewall to flywheel housing? That might need adjusting like the clutch did, how do I know when it's right? should it be tight or loose?
Cheers
Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
- Silverbullet
- Senior Member
- Posts: 2870
- Joined: Mon Aug 23, 2010 6:20 pm
- Location: Adelaide
Tailshaft...cardboard baffle? just so I know what you're on about that's the shaft from gearbox to rear diff right? Had no idea that had anything in it let alone cardboard baffles.
This has me baffled...
This has me baffled...
Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
- sven '2'
- General Member
- Posts: 1357
- Joined: Sun Oct 14, 2007 5:45 pm
- Location: Adelaide, South Australia
I tells the truth.Silverbullet wrote:Tailshaft...cardboard baffle? just so I know what you're on about that's the shaft from gearbox to rear diff right? Had no idea that had anything in it let alone cardboard baffles.
This has me baffled...
You spin a hollow tube at speed and will generate a sound wave. Hence the cardboard baffle within.
I thought it complete BS, until I replaced mine.
73 Yamaha DT3 250
08 Ford BF wagon - LPG FTMFW
14 Toyota Kluger - goodness!
08 Ford BF wagon - LPG FTMFW
14 Toyota Kluger - goodness!
A cardboard baffle inside a steel tailshaft lol. Everyday you learn something new!sven '2' wrote:I tells the truth.
You spin a hollow tube at speed and will generate a sound wave. Hence the cardboard baffle within.
I thought it complete BS, until I replaced mine.
Must be pretty special cardboard so it doesnt burn when the tailshaft gets welded, maybe heat resistant resin or something
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Owner SubieLiftOz, lift kits for Subarus
'97 Forester: EJ22E; 4" Custom Body Lift; JDM STi plated LSD; 20mm WRX RSB; Snorkel; Kings
Owner SubieLiftOz, lift kits for Subarus
'97 Forester: EJ22E; 4" Custom Body Lift; JDM STi plated LSD; 20mm WRX RSB; Snorkel; Kings
- Silverbullet
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- Joined: Mon Aug 23, 2010 6:20 pm
- Location: Adelaide
Didn't get to inspect the muffler this weekend...by the time I remembered it was too late
But now the buzz is there in most rev ranges, also just today it's started popping and crackling like crazy from the tailpipe when coasting in gear (ie down hills or engine braking) but I'm not sure if this is muffler related.
But now the buzz is there in most rev ranges, also just today it's started popping and crackling like crazy from the tailpipe when coasting in gear (ie down hills or engine braking) but I'm not sure if this is muffler related.
Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
- sven '2'
- General Member
- Posts: 1357
- Joined: Sun Oct 14, 2007 5:45 pm
- Location: Adelaide, South Australia
Based on this, mufflerSilverbullet wrote:Didn't get to inspect the muffler this weekend...by the time I remembered it was too late
But now the buzz is there in most rev ranges, also just today it's started popping and crackling like crazy from the tailpipe when coasting in gear (ie down hills or engine braking) but I'm not sure if this is muffler related.
73 Yamaha DT3 250
08 Ford BF wagon - LPG FTMFW
14 Toyota Kluger - goodness!
08 Ford BF wagon - LPG FTMFW
14 Toyota Kluger - goodness!
- Silverbullet
- Senior Member
- Posts: 2870
- Joined: Mon Aug 23, 2010 6:20 pm
- Location: Adelaide
So does the muffler prevent this snap crackle popping? I thought it was my coasting bypass valve giving up as well. Better start ringing around for a rear exhaust half I guess. Thanks sven!
Will it ever end!?
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
-EA81 TWIN CARB!!!!
-L series 5 speed
-Custom paint job
-2" lift
-Full custom re-wire
-L series front end
- Brumby Kid
- General Member
- Posts: 1297
- Joined: Sun Jul 17, 2011 9:19 pm
- Location: Belair S.A.
Yeah Dave is good. If it is like a mini backfire, it is probebly just a hole in the exhaust. That was my problem. Hmmm, get dave to take a look.
A new exhaust would always solve it, A nice growling lukey perhaps, Hahahahaha.
A new exhaust would always solve it, A nice growling lukey perhaps, Hahahahaha.
When life gives you a corner, drop a gear, pitch, and stomp the loud pedal
Bianca: 1991 Subaru Brumby
My First / Project car
EA81 Rebuilt by Tony Knight from knight Engines
2" body lift
25" 185r14 Yokahama Delivery Star, light truck tyres
2" Sports exhaust
Rear Aguip step/bar
Liberty seats
Mums Car 08 Liberty Wagon
Bianca: 1991 Subaru Brumby
My First / Project car
EA81 Rebuilt by Tony Knight from knight Engines
2" body lift
25" 185r14 Yokahama Delivery Star, light truck tyres
2" Sports exhaust
Rear Aguip step/bar
Liberty seats
"Bianca"
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Dads Car: 02 Impreza WRX STi[SIGPIC][/SIGPIC]
Mums Car 08 Liberty Wagon
- Silverbullet
- Senior Member
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- Joined: Mon Aug 23, 2010 6:20 pm
- Location: Adelaide
- Brumby Kid
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- Joined: Sun Jul 17, 2011 9:19 pm
- Location: Belair S.A.
Yeah, I understand, Dad and i are finding it hard to justify spending money at the moment. And Mum and Dad both have Dr in front of their names.Silverbullet wrote:Not on what I earn
When life gives you a corner, drop a gear, pitch, and stomp the loud pedal
Bianca: 1991 Subaru Brumby
My First / Project car
EA81 Rebuilt by Tony Knight from knight Engines
2" body lift
25" 185r14 Yokahama Delivery Star, light truck tyres
2" Sports exhaust
Rear Aguip step/bar
Liberty seats
Mums Car 08 Liberty Wagon
Bianca: 1991 Subaru Brumby
My First / Project car
EA81 Rebuilt by Tony Knight from knight Engines
2" body lift
25" 185r14 Yokahama Delivery Star, light truck tyres
2" Sports exhaust
Rear Aguip step/bar
Liberty seats
"Bianca"
[SIGPIC][/SIGPIC]
Dads Car: 02 Impreza WRX STi[SIGPIC][/SIGPIC]
Mums Car 08 Liberty Wagon
- El_Freddo
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Do what I did all through uni - buy something useful or something you really need and go without something else to make ends meet. Save the same way for big items. Worked a treat and I'm still having a relatively good time at the moment. A job would help out a lot more but then again, I wouldn't have any time to do anything... I need sponsorship
Cheers
Bennie
Cheers
Bennie