2nd Gen R58 Most liked posts in thread: Hard knock

I got a timing chain kit from Detroit Tuned. Once I got it apart the old tensioner was a quarter inch, at least, shorter then the new one. As most know I managed to brake one of the guide bolts, I did not feel my torque wrench click. Those bolts torque to 22lb, I knew I was going to tight. I should have stopped before that happened, it had been a long day.
The Gen2 cars are very different animals. It wasn't supper hard job but was not easy. The way the chain is set up it is very important to use the recommend procedures to tighten the pulleys, if not they can slip and cause damage.
Thanks Chad and everyone here that posted helping me with my broke bolt.

 

I may have been able to get away with just a tensioner but decided to do it all. I drove the Helmet a lot today it’s running great!

 

HA, or I am not running it hard enough. Just the joy of the N14 engine

 

After I put it back together and started it I know the noise was not the valves. I ran some Seafood through anyway because the valves should come up smooth not pop up. If I use a screwdriver as a stethoscope it is loudest when I put it on the belt tensioner near the block. You can even feel it. its a very pronounced knock.
So I took the belt off the AC and the generator. the sound was still there but much quieter. I could still hear it in the same spot with the screwdriver but agin much quieter. So that ruled out the generator. I put the car back together and it was louder. I took it for a drive but it did not go away. with the windows up and ac on you cant hear it. with the windows down you can.

Its a loud hard knock. I almost think its a rod but I don't see how.

Any ideas would really help.

 

Yes........fish oil is good for the N14 engine. Have you never heard that?

 

@minirab just took a long ride on mine today. Thanks. I don’t have a clue yet. I don’t think it’s the timing chain. It’s constant and changes with the RPMs.

 

Ok here is what the Helmet sounds like, guess I will be installing a new timing chain. As you can hear its a hard knock. I thought a timing chain rattle would sound like....well a chain rattling. That is why I didn't think the was my problem.

 

I don't know if maybe the replacement is a different design or what. But it is longer than the old one.