1979 911 SC - timing chains
 

I have my 911 SC in pieces changing valve guides and piston rings.

Should I change the timing chains? The mileage on the chains is uncertain, but they look to be in good shape. Also, what is the opinion on using the ones for sale on Pelican with the the master link?

Many thanks.

1979 911 SC - timing chains
 

Here’s my two cents [emoji4]

A good thing to take into account is that even the new and genuine Porsche chains suffer from "not so good" quality. This was told to me by Steve Weiner when I spoke with him last january. May he now rest in peace <3

So if your chains and sprockets are in good condition I think I would ise them instead of new ones. Remember these two components has mated togheter and seemes to work well.

If new chains are mounted then the parts will need to mate togheter with even a bit more wear before they match properly.
[emoji6]


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It’s a good valve job you’ll raise the compression into the 170s#. New rings, you place more drag on the bottom bearings along with more compression. Is this where you want to be?
I personally have no interest in snaplink chains, they have to be properly assembled and then subject to failing as the snap link come apart, I have seen this happen.
You’re not going to open the case, you don’t want to look in the bottom end see the mains for wear and scratches and the worn intermediate shaft bearings. The gaskets for the bottom end is about $60.
Bruce