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Bent rod? 

 

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 Post subject: Bent rod?
Posted: Fri Jul 27, 2012 10:14 pm 
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Just checking a few things on my XR6T block and when checking the distance between the block face and the top of each piston at TDC found variations of up to 1.5mm. Is that normal or do I have an issue with the rods?

 

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 Post subject: Re: Bent rod?
Posted: Fri Jul 27, 2012 10:39 pm 
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twase wrote:
Just checking a few things on my XR6T block and when checking the distance between the block face and the top of each piston at TDC found variations of up to 1.5mm. Is that normal or do I have an issue with the rods?

:cry: :cry: bent,should be close to a few thous of a inch .004-.008-or.1-.2mm,and thats generous

 

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 Post subject: Re: Bent rod?
Posted: Fri Jul 27, 2012 10:44 pm 
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Bugger, only cost $100 for the short motor anyway. I have a set of rods from another engine but no caps, are the caps interchangeable by chance?

 

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 Post subject: Re: Bent rod?
Posted: Fri Jul 27, 2012 10:53 pm 
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twase wrote:
Bugger, only cost $100 for the short motor anyway. I have a set of rods from another engine but no caps, are the caps interchangeable by chance?

can get the rod and cap resized,could use the caps off the bent ones,they measure the bore and resize it to the rod.

 

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 Post subject: Re: Bent rod?
Posted: Fri Jul 27, 2012 10:59 pm 
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hans hartman wrote:
twase wrote:
Bugger, only cost $100 for the short motor anyway. I have a set of rods from another engine but no caps, are the caps interchangeable by chance?

can get the rod and cap resized,could use the caps off the bent ones,they measure the bore and resize it to the rod.

Thanks, I might have to take the lot in to someone and get it done... I will strip it down tomorrow and see what condition the bearings are in.

 

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 12:20 am 
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after market rods will compare in price...........

 

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 10:05 am 
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Did some measurments this morning with a dial gauge rather than the crude vernier ones last night.
WRT Cylinder 6
cyl test1 test2
1 1.20mm 1.17mm
2 0.61mm 0.52mm
3 1.20mm 1.10mm
4 1.10mm 0.86mm
5 0.57mm 0.63mm
6 0.00mm 0.00mm

Test one from the center of the piston, test 2 from a point near the edge but below the lip where someone has previously cleaned a section of the piston. Looks like most if not all have issues...

 

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BF Fairmont Ghia Series II update.
GQ XR6T ghia patrol.

,======o00o
//__|__|_,\_____\,___
|_/--\'_|'__|_/--\_[]IIII[]
_( o ) )_____( o ) )=o=) )__

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 10:21 am 
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twase wrote:
Did some measurments this morning with a dial gauge rather than the crude vernier ones last night.
WRT Cylinder 6
cyl test1 test2
1 1.20mm 1.17mm
2 0.61mm 0.52mm
3 1.20mm 1.10mm
4 1.10mm 0.86mm
5 0.57mm 0.63mm
6 0.00mm 0.00mm

Test one from the center of the piston, test 2 from a point near the edge but below the lip where someone has previously cleaned a section of the piston. Looks like most if not all have issues...

check the gudgeon to piston top height,may have been a shoonky repair,grabbed all sorts of parts.

 

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 10:54 am 
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Pulled the main caps and the bearings are pretty worn, white metal gone in some parts, have not got to the conrod's yet.

 

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BF Fairmont Ghia Series II update.
GQ XR6T ghia patrol.

,======o00o
//__|__|_,\_____\,___
|_/--\'_|'__|_/--\_[]IIII[]
_( o ) )_____( o ) )=o=) )__

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 11:05 am 
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Is the NA crank the same as the turbo? This crank has a damaged end where the motor has been dragged on its end at some stage. The more I look the less of a deal this was.

 

_________________

BF Fairmont Ghia Series II update.
GQ XR6T ghia patrol.

,======o00o
//__|__|_,\_____\,___
|_/--\'_|'__|_/--\_[]IIII[]
_( o ) )_____( o ) )=o=) )__

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 1:15 pm 
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Sounds like someone's first go at a rebuild.
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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 1:22 pm 
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twase wrote:
Is the NA crank the same as the turbo? This crank has a damaged end where the motor has been dragged on its end at some stage. The more I look the less of a deal this was.

did you expect the boat anchor to have a pensioners life with-boost,crank it up and bend rods,main bearing wear confirms it,hard life.

 

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 1:31 pm 
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Not too worried, the bore has the hone marks and only a few minor marks. I suspected it was sus but the seller said he paid $550 for it from a performance workshop that someone had upgraded and it was going and low K motor. Anyway the only bit I really needed was one turbo piston from it, I have other 5 and 6 good (I hope) rods. I hope the NA crank I have is the same as the turbo version.

 

_________________

BF Fairmont Ghia Series II update.
GQ XR6T ghia patrol.

,======o00o
//__|__|_,\_____\,___
|_/--\'_|'__|_/--\_[]IIII[]
_( o ) )_____( o ) )=o=) )__

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 2:56 pm 
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Looks like they only just survived inside the block, few more drags and they would have been making there way out.
Attachment:
File comment: Theres the problem
Bent.jpg
Bent.jpg [ 472.32 KiB | Viewed 33 times ]

My spare set looks fine.
set
Attachment:
File comment: My good set
straight.jpg
straight.jpg [ 217.26 KiB | Viewed 35 times ]

 

_________________

BF Fairmont Ghia Series II update.
GQ XR6T ghia patrol.

,======o00o
//__|__|_,\_____\,___
|_/--\'_|'__|_/--\_[]IIII[]
_( o ) )_____( o ) )=o=) )__

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 Post subject: Re: Bent rod?
Posted: Sat Jul 28, 2012 3:41 pm 
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the top ones are definatly all bent.. :shock:
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