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Knock/thud from bellhousing area?? 

 

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 Post subject: Knock/thud from bellhousing area??
Posted: Wed Sep 26, 2012 7:46 pm 
Getting Side Ways
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Ride: 1992 EBII Fairmont

Location: Aga
VIC, Australia

Sometimes when going to start the EB there's a very aggressive knock coming from the bellhousing area, like a surge or something. It goes away around a minute later but it's been slowly increasing over time. What might be causing this? The tailshaft uni's are good, it feels dangerous like somethings loose but it's absolutely fine when driving, no vibrations or anything. Cheers.
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 1:35 am 
Getting Side Ways
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Ride: 93 ED sedan

Power: 161 rwkw

Location: Rockhampton
QLD, Australia

Check tightness of some bolts/nuts....like bellhousing bolts, steering rack bolts/nuts, K frame bolts/nuts, g'box bolts, g'box mount bolts, starter motor bolts, etc......

 

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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 10:00 am 
Getting Side Ways
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Torque converter bolts... flywheel bolts....
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 6:49 pm 
Getting Side Ways
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I've checked the torque converter bolts and they're tight, is it possible to get to the flex plate and that without taking the gearbox out? I hope it's not the flywheel. It's only happened when the car is parked ans only on startup, nothing when driven so I can only think it's something that's moving.
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 7:03 pm 
Getting Side Ways
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ILLaViTaR wrote:
I've checked the torque converter bolts and they're tight, is it possible to get to the flex plate and that without taking the gearbox out? I hope it's not the flywheel. It's only happened when the car is parked ans only on startup, nothing when driven so I can only think it's something that's moving.



remove the inspection plate / cover underneath (like where the bellhousing / engine bolt together, you'll see a plate you can remove) - you should be able to look up on the engine side of the flex plate and see the bolts holding the torque converter to the flex plate...

 

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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 7:40 pm 
Getting Side Ways
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Ride: 1992 EBII Fairmont

Location: Aga
VIC, Australia

tearlejc wrote:
ILLaViTaR wrote:
I've checked the torque converter bolts and they're tight, is it possible to get to the flex plate and that without taking the gearbox out? I hope it's not the flywheel. It's only happened when the car is parked ans only on startup, nothing when driven so I can only think it's something that's moving.



remove the inspection plate / cover underneath (like where the bellhousing / engine bolt together, you'll see a plate you can remove) - you should be able to look up on the engine side of the flex plate and see the bolts holding the torque converter to the flex plate...


Yeah checked those and they were tight, just checked the other bolts such as k frame, crossmember, suspension and bellhousing and are all tight. The sound is coming specifically from inside the bellhousing or possibly the gearbox, goes away after 30 or so seconds after being started up.
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Thu Sep 27, 2012 9:02 pm 
Getting Side Ways
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Ride: S1 eb 5speed

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Bottom end on it's way out. ?
Is it different if you start it in park or neutral?
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Sat Sep 29, 2012 8:24 pm 
Getting Side Ways
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Hey mate only does it in park haha, just put it all back together and the plates hitting the bolts on the converter, sounds great lol. So I gotta take it all apart anyway
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 Post subject: Re: Knock/thud from bellhousing area??
Posted: Sat Sep 29, 2012 8:52 pm 
Getting Side Ways
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Yep that'll do it. Haha
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