914/6 conversion >> 2.2T timing chain question

[farleyd]

Hi to all, while dismantling the chain housing, i noticed as small oval-shaped piece of metal, which revealed to be one side of a link of the chain. The rivet that holds the chainīs parts together is broken, hence the small part in the bottom of the housing.

I guess that i should change the chain... Questions.

1) Do i have to split the case?
2) What is a master chain? Is it used to pul the old chain and roll the new?
3) Should i use a stock or masterlink replacement chain?
4) Do i have to remove the cams and retime them?
5) Any infos on how change chain? I have Anderson book, havent seen it.

Thanks!

[Dave at Pelican Parts]

It would be a very very good idea to figure out why the rivet broke before you dig too far into the motor. No point in spending a lot more time and money on something that may need lots of machine-work to set up correctly again.

1) You don't have to split the case if you use a "master-link" type chain. If you go with the stock chain, you do have to split the case.

2) Not sure.

3) See #1 above. I've heard that it's generally a good idea to use the stock chain if you are splitting the case. If you aren't, you have to use the master-link chain.

4) I don't recall if you have to remove the cams, but you will have to retime them. You will at least want to check the timing, and if you're checking, it's not much more work to correct it.

5) Nope.

A couple more things: New chain ramps would be a very good idea, as would new tensioners. If I recall correctly, you were going with the SC or Turbo tensioners, with collars. That is a good fail-safe option. The other good option is the Carrera tensioners.

Check the 911 BBS as well. And you might write to James, Pelican's 911 guy. I've seen him set the cam timing in the parking lot of a hotel. That was on his race car, which was on its trailer, at the Sacramento Parade last year.

--DD

[farleyd]

>>It would be a very very good idea to figure out why the rivet broke before you dig too far into the motor. No point in spending a lot more time and money on something that may need lots of machine-work to set up correctly again.

Answer is that there was mechanical solid tensioners. My guess is that it caused too much strain on the chain.