Turbo Block Needed

[scam75]

Hi All

Following on from my HG thread, a boroscope has revealed water ingress in cylinder 4, presume HG, but more problematically cylinder 2 has heavy bore scoring and oil ingress, presume ring failure being the cause. Either way it's a big blow.

So I'm either looking at getting the block fixed or replacing it. Is the turbo block different to a non turbo block I suppose is the first question?

Another option is a 2nd hand engine from a silver rose, 110k miles, is on the bay for 3.5k at the moment. Apparently runs fine with no oil or water usage. Possibly I could recover money from selling my head etc.?

Also money is tight at the moment so I could really do with the cheapest proper solution I can get.

Advice please?

Gutted

Stuart

 

[blade7]

Liners in your block, surely the cheapest option? I wouldn't get ahead of yourself until the head has been removed though.

 

[Eldavo]

As above. Westwood Liners fitted and the block and head prepped for under a grand - you’ll need to add pistons though, suggest Mahle.


Late N/A blocks and Turbo blocks are the same - you can even buy new from Porsche for £2.5-3k.

 

[scam75]

Thanks guys.

I assume I would send the block to Westwood for the work? Head probably just needs a light skim as it hasn't overheated at all. What size pistons and what cost for Mahle? Assume they come with rings?

Cheers

Stuart

 

[scam75]

And if I bought a new block, I could use my own pistons? Does a block come with balance shaft housings? Sure I read these are matched to the block?

Stuart

 

[blade7]

When new blocks became available a few years back, I asked Cambridge OPC to get me a price for a bare 968 block. Despite chasing them for a while, they never got the price. I later read that the entire run of blocks were sold quickly in Germany.

 

[Eldavo]

Westwood just supply the liners, AMAC Engineering in Northallerton cut and fitted mine.


Your old pistons will have worn to the cylinders so I wouldn’t reuse them. New pistons will come with rings, etc. Performance Unlimited in York can get you a set of JE pistons, rings and pins for about £700. I can’t recommend Wössner without large caveats.

 

[blade7]

Maybe, though I'd have the pistons measured before chucking them out. Was it Kongsodoken that bought a good set of used pistons, and used them in his Capricorn nikasiled block?

 

[Waylander]

Pet shows a short block

looks to be with balance covers 944 100 961 00 £4115.00 inc vat

really sorry to hear that news Stu

 

[blade7]

Pet shows a short block

looks to be with balance covers 944 100 961 00 £4115.00 inc vat

It was 2 or 3 years ago I think. There was a friendly parts guy at Cambridge, that said he would give me some good discount. He moved on though, and his replacement didn't seem interested. Around the same time there were Mahle Motorsport Alusil compatible 968 turbo pistons available, but some builders had problems with those. So I went off the Alusil option.

 

[scam75]

Thanks Martin. Just need to take it on the chin.

Dave - I have asked AMAC for a price yesterday to source and fit the liners and pistons. I asked about re-using pistons but its a no go due to liner material, need pistons to suit. I still await Alastair to phone with price and I will ask about brand of pistons then.

I can probably sell my own pistons to recoup some funds, dunno, but they should be OK.

Cheers

Stuart

 

[blade7]

Dave - I have asked AMAC for a price yesterday to source and fit the liners and pistons. I asked about re-using pistons but its a no go due to liner material, need pistons to suit.

Cheers

Stuart

I'd use new pistons if the budget allows, you don't know if one of yours may have overheated. But I've never read the Porsche pistons can't be used in a ferrous liner, it's the rings that are material specific. Unless AMAC is twitchy about the low expansion rate/clearance for original pistons?

 

[blade7]

Westwood just supply the liners, AMAC Engineering in Northallerton cut and fitted mine.


Your old pistons will have worn to the cylinders so I wouldn’t reuse them. New pistons will come with rings, etc. Performance Unlimited in York can get you a set of JE pistons, rings and pins for about £700. I can’t recommend Wössner without large caveats.

The only downside I've read with JE pistons, is they're noisy from cold, did you use them?

 

[chrisg]

When my Turbo S burnt out an exhaust valve ( due to lean running) I had the block done with new liners from Capricorn - JE pistons with custom fly cut from Lindsay racing then had Mark Fish build the engine. That was 45K miles ago !

 

[Eldavo]

I have uncoated Wössner pistons in mine. They were a replacement for the failed pistons and have cost Allianz (their insurers) a fair bit too!

 

[scam75]

Thanks lads. I'm still waiting on a price. Might call again this afternoon if I don't hear back.

So assuming pistons cost about 700, probably looking at at least 1.5k to have the liners and pistons bought and short motor built up by AMAC?

Does that sound in the ball park?

Stuart

 

[blade7]

When my Turbo S burnt out an exhaust valve ( due to lean running) I had the block done with new liners from Capricorn - JE pistons with custom fly cut from Lindsay racing then had Mark Fish build the engine. That was 45K miles ago !

Did Capricorn use their Nikasil coated Alusil liners?

 

[chrisg]

When my Turbo S burnt out an exhaust valve ( due to lean running) I had the block done with new liners from Capricorn - JE pistons with custom fly cut from Lindsay racing then had Mark Fish build the engine. That was 45K miles ago !

Did Capricorn use their Nikasil coated Alusil liners?

Yes !

 

[blade7]

I've read Capricorn have plenty of motorsport work now, and may not even take one off jobs from new customers.