[Henry Schmidt]

See answers below in red

Originally Posted by cmcfaul

Getting ready to put it back together.

2.4 E engine with new JE pistons.

1. Do I need to replace the flywheel bolts? The 2.4/2.7 crank has inherent flaw. At rpm the crank tends to flex creating a rocking couple that results in an imbalance. This imbalance creates a vibration and at sustained higher rpm will cause the flywheel to loosen. We always use new bolts for this reason. In some applications we even use a better quality bolt.
2. I bought new rod bolts, do I also need new rod nuts? We always replace nuts as well but never use the stock nuts even with stock bolts. We use a serrated flanged, 12 point nut in this application.
3. Should I replace the fly wheel pulley with a bigger one to get more cooling...it does tend to run hot in the summer in traffic. Pulley size is strictly a function of engine rpm. If you spend a lot of time at low rpm a large pulley may help. Like everything else, engine building entails compromise, if you gain cooling at lower rpm you will lose cooling at higher rpm.
4. Any other details or tricks to the trade I should be aware of. There are a plethora of updates that improve the general performance and reliability of the 911 engine. Listing them all would require book. If you stick to proven methods you should be fine.

Many Thanks

Chris

73 911 E