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 Post subject: 944S2 block wanted after engine failure after 100 miles
PostPosted: Sat Sep 22, 2018 2:53 pm 
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Joined: Sun May 08, 2016 12:17 am
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Severe engine failure 150km's after a full rebuild has left me devastated, so i'm exploring options while the piston supplier does an investigation,
I'm looking for a 944S2 engine or block/crank cradle/balance shaft covers with (preferably) good bores,
Need it shipped to Sydney Australia (although can arrange my own shippng as I have family in UK)

Cheers

Steve

Some nasty photos for you
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 Post subject: Re: 944S2 block wanted after engine failure after 100 miles
PostPosted: Sun Sep 23, 2018 12:24 am 
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Joined: Sun Feb 24, 2008 8:16 pm
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Location: UK
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What pistons are they. And wouldn't it be easier to fit liners to your block?


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 Post subject: Re: 944S2 block wanted after engine failure after 100 miles
PostPosted: Sun Sep 23, 2018 6:57 pm 
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Joined: Sun Mar 11, 2012 11:03 am
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Location: Bolton U.K.
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Looks like the clearance was too tight. Sleeves may be the only way to go. Shame but I scrapped an S2 block for a similar reason, it must have run too long with a blown head gasket. ( not by me )
Too hot , too tight = pickup = death.

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 Post subject: Re: 944S2 block wanted after engine failure after 100 miles
PostPosted: Thu Oct 11, 2018 10:19 am 
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Think I read a while back Barry Hart saying he'd seen a quite few S2 blocks with damage at the bottom of the bores. With the shallower water jacket perhaps they need top clearance. Could be part of the reason 968 blocks have the piston squirters.


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 Post subject: Re: 944S2 block wanted after engine failure after 100 miles
PostPosted: Sat Oct 13, 2018 6:32 pm 
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Joined: Sun Feb 17, 2008 7:43 pm
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Had the bores been honed, rebored, we're they Porsche pistons. I ask because the engines had a special treatment on the bores, trick back in the 1980s. If it was damaged or machined away it would require retreatement. I remember been told that chrome piston rings were a definite no no.


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 Post subject: Re: 944S2 block wanted after engine failure after 100 miles
PostPosted: Sat Oct 13, 2018 11:30 pm 
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Joined: Sun May 08, 2016 12:17 am
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Milly wrote:
Had the bores been honed, rebored, we're they Porsche pistons. I ask because the engines had a special treatment on the bores, trick back in the 1980s. If it was damaged or machined away it would require retreatement. I remember been told that chrome piston rings were a definite no no.

yes, they were bored to 105mm, but done the correct way (with paste etc to expose the silicon)
they were aftermarket pistons, sold specifically for the 944S2, used the rings which came with the piston set


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