Timing Chain removal

[joetiii]

Scratching my head on this one so I need someone to jog the thought process. I have a 3.0 that was rebuilt bottom to top 25k ago. I am planning an upgrade w/ 98mm P&Cs, cams, etc and figure the bottom end is solid. I don't think the case needs to be split but I do want to change out the timing chain. I know pelican sells a split chain w link, but I'm not sure how one goes about removing the solid chain..... Thoughts?

[jwasbury]

you'll need to cut it, or maybe you can press one of the link pins out with a motorcycle chain tool.

[lindy 911]

Not sure why you would change the chains at 25K miles. New chains mean new sprockets both at the cam and at the I shaft.

Lindy

[brads911sc]

Did you change your intermediate shaft sprockets?

M Callas at Rennsport in Sealy checked mine and told me they were fine and advised me not to change them... He also advised against changing the Wrist Pin bushings. Said they were like new and in spec. I had new parts in hand.. but if the pros say no.. who am i to question...

Now Im thinking I should go ahead and change them...

Originally Posted by lindy 911

Not sure why you would change the chains at 25K miles. New chains mean new sprockets both at the cam and at the I shaft.

Lindy

[lindy 911]

Lots of schools of thought here; I'm basically of the opinion that with chains and sprockets if you change one component you need to change the others as well. This comes for my motorcycle days; putting a new chain on old sprockets quickly made for an old chain. Sprockets are cheap. Splitting the case is not.

Lindy

[brads911sc]

That is a good point... Since I have the gears I might as well change them.

I agree with you on the question to the OP... There is no way that any of that needs changed on Joe's car unless there is some issue we dont know about...

Originally Posted by lindy 911

Lots of schools of thought here; I'm basically of the opinion that with chains and sprockets if you change one component you need to change the others as well. This comes for my motorcycle days; putting a new chain on old sprockets quickly made for an old chain. Sprockets are cheap. Splitting the case is not.

Lindy

[lindy 911]

Joe,

If you're set on replacing the chains , removing the old chain is not hard. Pick a link plate and grind both pins flush with the surface of the link plate. With a punch, knock the pins and the back plate out the back side with a hammer. You can also go down to your local kart shop and buy a small chain breaker that works like a small "C" clamp that will push the pins out without grinding. Either way is simple.

Lindy

[cmcfaul]

Just did this and it easy.

Grind off a pin on the chain and remove the pin. The chain is now broken. Use a zip tie to connect the old chain to the new one and turn the engine via the drive shaft to pull the new chain in and around the sprocket in the case.
Insert the master link in both ends of the new chain to complete the circle and done.

Chris
73 911 E

[lindy 911]

Make sure the open end of the master link clip follows the direction of the chains movement. Don't install the clip with the open end facing the direction of the chain travel. If the chain travels from left to right, place the clip so the open end points to the left.

Lindy

[joetiii]

I don't think I have any issues with my main chain. I was reading wayne's book and he recommended to always replace the chain. I know the book has been out for awhile and opinions have been formulated since then that all the gears should be changed out as well which requires a case split.

I suppose once I get it open I can check wear.....