Balanced shafts
Posted: Thu Aug 31, 2006 10:33 pm
After much spanner twirling, head scratching, and more than a little cursing and swearing, my Sigma is back in action - and better than it's ever been (since I bought it, anyway...)
Had a stuffed exhaust valve (on a freshly reconditioned head
) and decided to replace the rattly balance shaft chain while I was at it. Talk about a big job! 
Finished it today (timing kit and VRS kit) and finally got to take it for a thrash - it will now rev to redline. 
As long as I've owned it, it would be vibrating badly by 5000rpm, and I've not had the guts to find the redline. I buggered up the disassembly, and didn't manage to work out if the balance shafts were properly synchronised, but I KNOW they're right now!
So, I'm guessing that some tosser somewhere in the past managed to assemble the balance shafts out of sync, and I'm amazed at the difference it makes. Getting it right is worth the effort!
So, those owners of 2.6 Pajeros - it may be tempting to eliminate the balance shafts in search of extra power, but I'm impressed by how smooth the motor runs when it's right.
Better than my 1700 Saturn ever was (although still not as fast... 
)
Cheers,
Scott
Had a stuffed exhaust valve (on a freshly reconditioned head
) and decided to replace the rattly balance shaft chain while I was at it. Talk about a big job! Finished it today (timing kit and VRS kit) and finally got to take it for a thrash - it will now rev to redline. As long as I've owned it, it would be vibrating badly by 5000rpm, and I've not had the guts to find the redline. I buggered up the disassembly, and didn't manage to work out if the balance shafts were properly synchronised, but I KNOW they're right now!
So, I'm guessing that some tosser somewhere in the past managed to assemble the balance shafts out of sync, and I'm amazed at the difference it makes. Getting it right is worth the effort!
So, those owners of 2.6 Pajeros - it may be tempting to eliminate the balance shafts in search of extra power, but I'm impressed by how smooth the motor runs when it's right.
Better than my 1700 Saturn ever was (although still not as fast... )Cheers,
Scott