Finally!

All Porsche 911's, 912's & 914's.

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Bleyseng
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Re: Finally!

Post by Bleyseng » Fri Sep 14, 2018 7:28 am

Latest post of the previous page:

Amskeptic wrote:
Mon May 07, 2018 10:58 am
Man, I would love to do some CSI Air-Cooled on some of these tragic fails.
The fail is improper valve seat installation without the right interference fit into the head. This local shop is known for its failures but these heads were done in 1998 and made it 20,000 miles
Geoff
77 Sage Green Westy- CS 2.0L-160,000 miles
70 Ghia vert, black, stock 1600SP,- 139,000 miles,
76 914 2.1L-Nepal Orange- 160,000+ miles
http://bleysengaway.blogspot.com/

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Amskeptic
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Re: Finally!

Post by Amskeptic » Sat Sep 15, 2018 7:54 am

Bleyseng wrote:
Fri Sep 14, 2018 7:28 am
Amskeptic wrote:
Mon May 07, 2018 10:58 am
Man, I would love to do some CSI Air-Cooled on some of these tragic fails.
The fail is improper valve seat installation without the right interference fit into the head. This local shop is known for its failures but these heads were done in 1998 and made it 20,000 miles

It is a challenge to communicate to our machinists all the details we now know must be done correctly. Every problem I have had to face comes back to that moment where my heart sank as they said, "naw, it'll be fine, I've been working on these things for years."
Colin20kSinceMay23rd
BobD - 1978 Bus . . . . . . . . . . .111,130 miles
Chloe - 1970 bus . . . . . . . . . . . 206,787 miles
Naranja - 1977 Westfalia . . . . . 91 414 miles
Pluck - 1973 Squareback . . . . . 55,510 miles
Alexus - 1991 Lexus LS400 . . . 72,113 miles

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Amskeptic
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Re: Finally!

Post by Amskeptic » Sat Sep 15, 2018 7:56 am

Bleyseng wrote:
Fri Sep 14, 2018 7:25 am
I used the 96mm Biral cylinders this time. A lot bigger it turns out so the tin barely fits with some effort.
Any cooling concerns as a result?
Colin
BobD - 1978 Bus . . . . . . . . . . .111,130 miles
Chloe - 1970 bus . . . . . . . . . . . 206,787 miles
Naranja - 1977 Westfalia . . . . . 91 414 miles
Pluck - 1973 Squareback . . . . . 55,510 miles
Alexus - 1991 Lexus LS400 . . . 72,113 miles

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Bleyseng
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Re: Finally!

Post by Bleyseng » Sat Sep 15, 2018 3:07 pm

No, and the aluminum fins will cool the cylinders better. It wasn't a concern with steel cylinders but it's a experiment.
Geoff
77 Sage Green Westy- CS 2.0L-160,000 miles
70 Ghia vert, black, stock 1600SP,- 139,000 miles,
76 914 2.1L-Nepal Orange- 160,000+ miles
http://bleysengaway.blogspot.com/

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