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advice on engine knock 

 

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 Post subject: Re: advice on engine knock
Posted: Tue Jun 30, 2009 12:50 am 
Getting Side Ways
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Age: 66

Posts: 2548

Joined: 18th Mar 2006

Ride: EF-XR8chaser

Location: wollongong
NSW, Australia

eboost wrote:
15 w 40

im thinking the clearance is to big and if the journals are tapered and worn its worse,mains may be ??? then the rod pins to pistons,you may have to get a spec book and measure it up,a real p-----,he tried a quick fix.

 

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 Post subject: Re: advice on engine knock
Posted: Tue Jun 30, 2009 5:59 am 
Parts Gopher
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Joined: 24th Aug 2008

Location: Sydney
NSW, Australia

Sorry about the gap!

Ballsed up that.
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 Post subject: Re: advice on engine knock
Posted: Sun Jul 05, 2009 10:23 pm 
Fordmods Newbie
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Joined: 5th Jun 2009

Location: Not in Sydney
NSW, Australia

Have you checked the end float on the crank since this fellow had it re-sleeved? I'd have a look at the thrust bearings to see if they have bad wear. Also measure the crank journal where the knock was worst. Possible out of round since the re-sleeve caused by a twisting motion and forces on that journal. My guess is that the motors bores are not in centre with the crank and the journals. Motor will have to come out and measure everything to make sure it's right unless you get lucky and find something simpler giving him grief.
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 Post subject: Re: advice on engine knock
Posted: Sun Aug 09, 2009 7:37 pm 
Oompa Loompa
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Joined: 9th Aug 2009

Ride: EB SXR8 347 Stroker

Location: melton
VIC, Australia

lucky owner of disco V8.firstly dont buy one as it would cost you more than its worth.secondly,i have been tinkering with motors for many years and this ones got me stumped.cylinder 7 has the knock...piston to liner clearance 1.5 thou......suspect main bearing.....1.8 thou clearance......big end..1.5 thou clearance ....bearings look ..ok...no excessive crankshaft movement....could it be low oil pressure causing the knock??????? wrist pin was also found to be ok. :( any help would be greatly appreciated.
I have had to bring my xr8 out of retirement because of the unreliability of the rover.
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 Post subject: Re: advice on engine knock
Posted: Sun Aug 09, 2009 9:52 pm 
EFI Guru
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Location: Perth
WA, Australia

time for an F-series EFI 351W I reckon :D
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