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lobby69
PostPosted: Sun Jun 05, 2005 2:39 pm 
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Location: thornleigh sydney...round crnr from suzitech!!!!
hey guys,
ive got a bad knocking noise from aruond back of the block, seems to be around the cam area.
what do you guys reckon it is?
we just put the 1100 in, with new cam, cam followers, timing chain, and reco'd head, what do you reckon it could be?
at idle its a constant knocking noise, when throttle is applied the noise becomes irratic off-beat knocking. and is quite loud.
any help is appreciated.
cheers fellas
Blake
:wink:

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FatMaserati
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PostPosted: Sun Jun 05, 2005 2:42 pm 
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Is it like "an exhaust knocking against the chassis" kind of noise"?

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min13k
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PostPosted: Sun Jun 05, 2005 5:38 pm 
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kez should be home soonish but sounds like a bearing failure
makka

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Bromley
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PostPosted: Sun Jun 05, 2005 5:46 pm 
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I had a similar noise, it turned out to be the front exhaust mounting bolt.
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-=MiniMafia=-
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PostPosted: Sun Jun 05, 2005 6:06 pm 
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could it be your engine steady bars?

good luck!!! if it sounds like its coming from inside your motor, stop driving it!!!!

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lobby69
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PostPosted: Sun Jun 05, 2005 6:15 pm 
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Location: thornleigh sydney...round crnr from suzitech!!!!
hey
no quite sure its not the xorzt rattling.
the knocking increases with revs. and becomes irratic and sometimes off-beat.
cheers
blake
:wink:
edit - no oil pressure guage :wink:
but its running thick gear oil atm

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71 MS75 toyota crown COUPE :) yes A COUPE!
76 ra23 celica wid 1ggte, GT3071r, 13.5@106mph with alot of spinin....

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Last edited by lobby69 on Sun Jun 05, 2005 6:19 pm, edited 1 time in total.

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Spaceboy
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PostPosted: Sun Jun 05, 2005 6:17 pm 
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small end or big end bearings..
whats your oil pressure like?
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drmini in aust
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PostPosted: Sun Jun 05, 2005 7:02 pm 
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If you put an RE13 or similar cam in, there may now be too much valve lift for the springs- check they are not closing up....

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supercharged 850
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PostPosted: Mon Jun 06, 2005 12:56 am 
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Maybe it could be the mechanical fuel pump (that is, if yours is a mechanical one) - its cam driven :roll:

I dunno, just a thought.

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Mike
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PostPosted: Mon Jun 06, 2005 5:16 am 
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Sorry to sound so agricultural, but could this be your fan hitting its shroud?
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1310/71
PostPosted: Mon Jun 06, 2005 6:52 am 
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Location: Plumpton, NSW
lobby69 wrote:
hey guys,
ive got a bad knocking noise from aruond back of the block, seems to be around the cam area.
what do you guys reckon it is?
we just put the 1100 in, with new cam, cam followers, timing chain, and reco'd head, what do you reckon it could be?
at idle its a constant knocking noise, when throttle is applied the noise becomes irratic off-beat knocking. and is quite loud.
any help is appreciated.
cheers fellas
Blake
:wink:


If it sounds like a rattle more than a knock, check the harmonic balancer. I've just changed mine and the keyway was broken and the rubber in the S type harmonic was gone. It sounded like a tappet rattle but in my case, it was worse at idle (or the engine was masking the noise at revs!)
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