39 replies to this topic

[unburntfuelinthemorning]

This'll teach me to check clearances better:

 

 

Should I have fitted an oil flinger with a duplex setup?

 

If so why is it contacting the chain?

[Icey]

Looks like you had it on the wrong way around? The side with the marks on should be away from the chain, not running against it.

Edited by Icey, 28 March 2019 - 01:22 PM.

[Steve220]

Looks like you had it on the wrong way around? The side with the marks on should be away from the chain, not running against it.

F is stamped on the other side of the disc, from what I can see, he had it the right way round.

[dodge44]

Too much crank or cam end float or the gears were not shimmed in alignment when fitted. Technically the 'F' should face outwards ie. 'F' stands for 'Front', but are often put on the other way round in error. Have also heard of rather generous proportions to some replacement chains which drag on the flinger so may be that. Manuals are not helpful with this item though as most still show the earlier type of flinger with a much more pronounced flange, which does go on the other way round!

[gazza82]

Where is the metal that got scraped off?

[GraemeC]

I've had them do that too - I put it down to a the IWIS chain being slightly wider than standard.

[unburntfuelinthemorning]

 

Looks like you had it on the wrong way around? The side with the marks on should be away from the chain, not running against it.

F is stamped on the other side of the disc, from what I can see, he had it the right way round.

 

Yes, the 'F' is on the other side so was facing outwards.

[unburntfuelinthemorning]

Too much crank or cam end float or the gears were not shimmed in alignment when fitted. Technically the 'F' should face outwards ie. 'F' stands for 'Front', but are often put on the other way round in error. Have also heard of rather generous proportions to some replacement chains which drag on the flinger so may be that. Manuals are not helpful with this item though as most still show the earlier type of flinger with a much more pronounced flange, which does go on the other way round!

The gears were shimmed to align them but end float is now slightly over what it should be.  That only accounts for a few thou though, the wear is much more than that.  It looked close to the chain upon fitting but I didn't think it was touching.  Maybe if I'd fitted the crank pulley without the timing cover and tightened the bolt it would have become apparent.

[unburntfuelinthemorning]

Where is the metal that got scraped off?

Best not to think about that.

[unburntfuelinthemorning]

I've had them do that too - I put it down to a the IWIS chain being slightly wider than standard.

That could be it; I fitted this chain http://www.minispare.../2H4905EVO.aspx as part of a duplex kit. 

 

How did you solve the problem?  Maybe some timing gear shims fitted between the flinger and the crankshaft timing gear would do the trick - they'd need a slot cutting to fit over the woodruff key

[imack]

I've not had a problem running a flinger with the Iwis chain and kent cams vernier duplex.
Recently fitted the MED alloy timing cover and was advised by MED not to bother fitting the oil flinger.

[Icey]

 

 

Looks like you had it on the wrong way around? The side with the marks on should be away from the chain, not running against it.

F is stamped on the other side of the disc, from what I can see, he had it the right way round.

 

Yes, the 'F' is on the other side so was facing outwards.

 

 

Yep, apologies, it looked odd to me so had a quick Google and the first image showed one fitted incorrectly. Looking again this evening you are correct.

[nicklouse]

i would say the crank was not shimmed correctly. that is to say the cam was not in the correct position.

[Spider]

It's evident from the witness marks and the bend in it that it was fitted back to front.

The F Stamping is heavy and can be seen on both sides, but if you look carefully, you'll see one side is backwards

[GraemeC]

Moke - you can see the F in the picture and that it is backwards - that shows it was fitted correctly.

 

It could be that the crank wasn't shimmed correctly, but I doubt this.  On reflection I would say a probably cause is aftermarket duplex gears where the boss on the front of the crank sprocket isn't quite long enough.

The only way to be sure it doesn't do it again is to dry build that end of the crank with no cover but install the damper and torque up then shim the flinger off the crank sprocket or adjust it with a bfh.

 

Similar to the thread running on the MiniSport gears not shimming correctly, I've had an instance where a (different) supplier chose to simplify their manufacturing by using the same crank sprocket for both their steel vernier set and steel non-adjustable lightweight set.  Only they didn't check the drawings properly and although the crank sprocket for each set looked the same, they were dimensionally different.

At the time it was all my fault and the crank was wrong, they'd never had an issue before, etc etc etc.  Fast forward a few months and when one of their own employees had the same problem they looked into it and found the issue. Never did get an apology....

Edited by GraemeC, 29 March 2019 - 08:11 AM.