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nuggitt · Moderator

I recently changed my clutch cover for a better one. Having read the article in the clutch section in the good book (Haynes) about removing the clutch cover. It says loosen the clutch cover bolts a ¼ of a turn at a time in a criss-cross pattern, which I did. When I removed the clutch cover. I cleaned all the surfaces up so they were spotless and dry. I made sure all the dowels were in place and then fitted a new gasket. I then did everything in reverse by tightening the bolts up a bit at a time in a criss-cross pattern.

After starting and getting the engine nice and hot. The problem I now have is a very, very slight oil leak coming from the middle part of the left-hand side of the clutch cover, which then runs down to the bottom part of the clutch cover. it’s not a lot but it’s there. Which I’m not happy about. You can see the small amount on my finger in the photo.

Now this has got me thinking of why you have to undo the bolts by a ¼ turn in a criss-cross pattern. If you don’t do that way and let’s say you, do it in a clockwise pattern will doing it that way cause the clutch cover to warp/twist??

Which leads me on to the question of the lad I bought it from. Now did he do it the correct way or the wrong way causing it to warp or twist? Can somebody enlighten me if I’m right in thinking this way?

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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

Goshreally2 · Spanner Monkey

Hi Nuggit, did you use any form of gasket sealer?
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Well I'll be .....

nuggitt · Moderator

No, but it was in my thoughts whether to use any or not. It doesn’t mention in the Haynes bible to use any gasket sealant. It looks like I’m going to have to get another new gasket and apply some sealant to it. 🤔
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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

Stig · Site Admin

The VERY small amount of twist possible by undoing it wrong must be rediculously small. The thickness of the gasket compressing should be able compensate imho
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AKA Bald headed b'stard

nuggitt · Moderator

That’s what I thought stig. All the surfaces were cleaned and there wasn’t any traces of old gasket that could cause a high spot. 🤔
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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

creedxup · Parts department

That point is right where the upper and lower crankcase halves join together, you may find the leak is from the joint in the cases rather than the cover, it’s bolted at about an inch further in than the cover, I’d be surprised if it was loose, but you never know.
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock

nuggitt · Moderator

I’ve just checked to see if that crankcase bolt is tight and it is. I’m waiting for a new gasket to arrive and when it does I’ll take the cover off again and investigate further. Would a bit of gasket sealant in that area help fix the problem? 🤔
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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

creedxup · Parts department

I’d be very surprised if the cover was warped, so it must be some damage possibly a scratch or scrape on the cover, or the dowel is damaged and not allowing the cover to sit flat on the cases, some sealant will help if you find a scrape or scratch but ensuring the cover sits fully flat on the cases before you fit the gasket is the best way.
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock

Goshreally2 · Spanner Monkey

I fitted a new clutch recently. When refitting the cover I used blue hylomar applied very thin and evenly. I remember thinking about the area of the cover Nuggit is having problems near - because it is next to the crankcase joints and is a fairly wide flat piece on the cover I felt that using the sealent would prevent any leak due to tiny imperfections. I have always used hylomar anyway unless the manufacturer says do not. Also I have checked the torque on the bolts 3 times since the refit.
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Well I'll be .....

Goshreally2 · Spanner Monkey

Sorry I left out that I did a very close inspection of the cover and crankcase for issues, none found but I still used the sealant because to be honest I didn't trust the crankcase joint for 100% accuracy and never have.
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Well I'll be .....

nuggitt · Moderator

I've got the gasket and sealant delivered today, so I'll be having another go at it maybe tomorrow. big grin

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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

nuggitt · Moderator

I may have chance to do this clutch cover today. Once I’ve had a look to see what’s happening, and whist I’m applying the gasket sealant, would it be a good idea to apply it to all of the cover area or just the section that’s got the leak? 🤔
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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

creedxup · Parts department

Normally I’d advise applying the hylomar on the cover so that it sticks to the cover and if you need to remove it again, the gasket comes off with it, I think in your case I’d put some on the cases as well, just in that area.

You only need a very fine bead of sealant or spread out thinly and evenly.
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock

nuggitt · Moderator

Cheers Chris.

I've got the cover off and this is what I've come across. If that's causing the oil leak, then we are in a mess? See photo 3. The two dowels look ok all the surfaces are flat and clean.

What gets me is, when I had the old cover on there wasn't any leaks.

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Bit of advice. Buy a good bed and a good pair of shoes, because if you aren't in one you'll be in the other.

creedxup · Parts department

I wouldn’t worry about that, just pull the loose piece off, it’s just excess sealant squeezed out when the cases were assembled that’s come loose.

All your surfaces look good, so it’s very odd that it was leaking.
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1992 RU midnight blue, Wiseco 1070, 6 speed, r1 calipers, ducati discs , 157 bhp crank, Ohlins shock