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-   -   Timming chains (http://forums.pelicanparts.com/porsche-911-technical-forum/982144-timming-chains.html)

gomezoneill 12-31-2017 12:39 PM

Quote:

Originally Posted by hienz (Post 9867513)
Ivan
I am in San Jose, CA. Bought Porsche yoke from England and it arrived yesterday. Yes it has 4 spokes like in your picture. I cannot upload any picture from my iphone6 even the pic is 0.8MB. When I was younger I build and fly Nito power RC helicopters and got bitten by Porsche bugs since I jointed Lima Prieta PCA. Now on my week ends off from work I like to tinkle around with Porsches in my large 6-car garage. Nothing fancy in my garage yet but trying to collect some stuffs so I can tinkle when I am retired

I hope you mean tinker!;)

hienz 12-31-2017 07:39 PM

Yes, very expensive. I'll never do that again.
Happy New Year. Cheer!

hienz 12-31-2017 07:45 PM

Ivan,
Don from EBS sold me some valve covers last week. Please see photos he posted on this website.
Can you tell if they are aluminum or magnesium? I really like them because they are look and feel stronger than the original valve covers came with my 1975 911s. Those original valve covers came with my 911s look and feel like "potato chips"

proporsche 01-01-2018 01:47 AM

Hi Hienz which web address??

Daves911L 01-01-2018 06:19 AM

Heinz,
The replace-able link timing chains are useful in some situations. I have used them on occasion. In an emergency I would do as you are suggesting. In theory, if you replace the new chain back on the same tooth, there should be no change in timing, aside from any manufacturing tolerances in the chain itself.

But as a practical matter you will find that "fishing" the new chain around the layshaft sprocket is very tedious. In the process of feeding the chain through you will be rotating the crankshaft/cams (remember to fully loosen the rocker arms !). Since yours is not an emergency, It would be best to start with the cam nut and then re-time the cams to finish. It is not difficult to learn, and the tools are not costly.

Now to the heart of the matter, if your engine really has only 35K miles on it, there should be no need to renew the chains. Nor is there really any need to "upgrade" to pressure-fed tensioners. The sealed hydraulic tensioners cah be easily rebuilt, renewing the seals and re-filling with oil, and will work very well. I treat servicing tensioners as a regular maintenance item on my cars. I don't use the collars. You will hear a tensioner starting to "go soft". I think the collars can mask the sound of impending tensioner failure, effectively becaming mechanical tensioners. The collar then starts to get hammered by the action of the tensioner. I have seen a couple of engines where the collar broke and the pieces rode through the chain with the expected catastrophic results. If you go with the pressure-fed "upgrade", be aware that they can "go soft" just like the sealed units.

Don at EBS is a good guy. If he sent you a valve cover you can be sure it is the right one, and the best (aluminum) and latest revision.

hienz 01-01-2018 01:44 PM

I have replaced out old chains on my Ducati 916sps many times using master link on new chains since my 1998 and no problem on track days. Thought to cut corners and use master link would be simple on 911s, but like you said to get the master link on due to lack of room will be difficult. My 911s still running like new I should not touch the tensioner or updated to Carrera tensioner. I like babe covers I bought from Don at EBS. I now needed to clean one of my original intake valve cover to make the engine looks nice. Don sold me only 3 covers( 2 lower 1 upper).
Happy New Year

hienz 01-01-2018 01:46 PM

Quote:

Originally Posted by proporsche (Post 9868105)
Hi Hienz which web address??

FS here at pelican parts forums

proporsche 01-01-2018 02:19 PM

i c ,yes these valve cover are good to put on your engine .When you do oil change that is the time for it.Save the old ..don`t ask me why but anything retro in 10 years will be pretty penny..;-)
You can get the 4th cover on any web Porsche part store try Sierramadre collection in Pasadena..


Ivan

Bob Kontak 01-01-2018 03:18 PM

Quote:

Originally Posted by proporsche (Post 9868105)
Hi Hienz which web address??

http://forums.pelicanparts.com/porsche-911-used-parts-sale-wanted/979943-ebs-racing-fs-911-3-2-engine-parts.html

proporsche 01-01-2018 03:21 PM

thanx Bob..;-)
Ivan


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