7k Ke30 5 Speed Dilemna

[ikon_idol]

hi ikon do you recall whether the crankshaft had balance weights on it or not? I am under the impression that due to the larger crank in the 7K that it may have been necessary to externally balance the motor due to lack of room in the sump area.

 

Hi.

My 7k crank looks similar (but stronger/thicker here and there) to a 4k/5k in that its balanced in the same way. Its counter weighted and balance drilled in the same way a 4k/5k crank is. It has a longer stroke than the 5k and the actual crankcase and oil pan is a little wider for this reason.

By the look of it very little drilling and grinding was needed to re-balance.

[Rollaboy2608]

Hi.

My 7k crank looks similar (but stronger/thicker here and there) to a 4k/5k in that its balanced in the same way. Its counter weighted and balance drilled in the same way a 4k/5k crank is. It has a longer stroke than the 5k and the actual crankcase and oil pan is a little wider for this reason.

By the look of it very little drilling and grinding was needed to re-balance.

if thats the case then I doubt I have a balance problem. I think I'm just gonna have to pull the box out and find out whats going on in there.I'll let you know what I find

[camerondownunder88]

Here is my 2 cents,

I run a 5K in a KE15 sprinter with its original 4 speed KE1X gear box with the forwards shifter position. I have no issues with the clutch at all.

 

But on the 5K when it was in my KE30 it ran a 3 dowel flywheel off a standard 3K/4K motor no issues and in the sprinter the older style 2 dowel early 3K flywheel. Again no balance issues all goes straight in.

 

I feel you have another issue some where. As also stated above the 7K is a counter weight balanced motor so fly wheel shouldn't affect the balance if the fly wheel inst damaged warped etc.

 

But do you have a harmonic balance on the front of the 7K? As most 5K/7K all run a harmonic balancer so if you went and used a normal pulley off a 3K/4K maybe this is the cause of vibrations? Un likely but.

 

And how was the fly wheel installed. EG was it torqued down properly? As my dads torana new from factory had awful vibrations shudder etc. We pulled it out when we got the motor rebuilt many years later and all we did was face the flywheel for a new clutch then we installed it torquing it properly and no more shudder or vibrations so maybe the fly wheel was torqued down wrong?

 

Also one last possibility. You have managed to snap the center part of the clutch that holds the springs and the spline bit away from the fiber section. YES it can be done. My 3K did this a month back. The little metal tabs that are riveted to the center of the fly wheel and then to the fiber section all snapped. While it was dying I though it was gear box issues. As I had major shudders. banging sounds yes I snapped a clutch cable and I also would engage the clutch and there would be vibrations then you wouldn't move much or slowly then it would pick up. As this was the center section spinning around and the fiber section held still so maybe the clutch plate is dead. And the clutch that went in my car had 100,000KM on it and wasn't flogged/ dropped clutch etc so it just gave up. So I say pull out box have a look. As a 4K flywheel will fit a 7K and should work in any K40/50 box with a standard clutch.

 

Cheers

Cameron

[Guest Sbox]

Deleted

Edited May 24, 2008 by Sbox