Cylinder wall treatment for Porsche?

[2EHA]

Just got done changing the oil on a friend’s 06 Cayenne S and just read up on some supposed cylinder scoring issues plaguing multiple different Porsche engines. Apparently the block is an Aluminum-Silicon alloy and if the hard silicon layer is worn out the engine begins to lose compression.

A couple of my old MBs had their blocks made with the same kind of technology and I’ve never heard of this being a problem. When you see those cars at the junkyard with heads off they usually have an impeccable cylinder finish, whereas apparently all porsches suffer scratching to some extent.

Some especially seasoned forum warriors are saying that LM Ceratec of all things have restored compression, oil consumption and overall worked miracles. Would there be any additive preferable for this sort of application?

 

[Kamele0N]

Just maybe.....

Honda EU10i smoking. To ring or not to re-ring. That is the question.

whether tis nobler in the mind… blah de blah Often the first symptom people actually notice is that machine cuts out after a few seconds running due to low oil level actuating the oil alert s…

petepowerblog.wordpress.com

You can just change the rings and the problem will be improved for a while but it won’t be long before you are back where you started. The best approach with an EU10i is to run it with a very light (400:1) mix of 2 stroke oil from day 1 to improve the upper cylinder lubrication.

 

[OVERKILL]

Just got done changing the oil on a friend’s 06 Cayenne S and just read up on some supposed cylinder scoring issues plaguing multiple different Porsche engines. Apparently the block is an Aluminum-Silicon alloy and if the hard silicon layer is worn out the engine begins to lose compression.

A couple of my old MBs had their blocks made with the same kind of technology and I’ve never heard of this being a problem. When you see those cars at the junkyard with heads off they usually have an impeccable cylinder finish, whereas apparently all porsches suffer scratching to some extent.

Some especially seasoned forum warriors are saying that LM Ceratec of all things have restored compression, oil consumption and overall worked miracles. Would there be any additive preferable for this sort of application?

No additive is going to repair mechanical damage. Is your friend actually suffering from this issue? BMW used the same process as well and as far as I know, there were no issues with it (unlike the Nikasil problems). My S62 had alumasil bores.

 

[Donald]

The solution if really worn cylinder walls is bore and oversize pistons. No additive will work, if it appears to it will not work long term.

 

[kschachn]

As someone who has an Alusil block in my old BMW I'm always interested in issues like this. I thought the Porsche problem was some sort of lack of lubrication, not the material?

 

[2EHA]

As someone who has an Alusil block in my old BMW I'm always interested in issues like this. I thought the Porsche problem was some sort of lack of lubrication, not the material?

The Cayenne Turbo has oil squirters and was supposedly touted to be immune from this issue, which turned out to be fake news. Both the S and the Turbo seem to suffer this issue at the same rate, as do the Flat Sixes.

 

[KCJeep]

The additive "Restore" actually works for this sort of thing, but is a short term band aid. It needs to be used every OCI and only lasts 2 to 3k. But it works, at least in some applications.

Don't do a UOA after using Restore though, it will make it look like the engine is about to grenade! (Restore uses a large amount of soft metal additives IIRC).

 

[Kamele0N]

What sulphur levels has your gasoline over there?

Nicasil is very sensitive over sulphur in gasoline..

 

[double vanos]

I can’t think of a single reason to use this technology over steel cylinder liners, except weight savings. Saving weight in the bore area of an engine, especially a Porsche engine, seems insane to me.
Steel liners add maybe 6lbs to an engine (guessing); I’ll take the extra weight gain to improve longevity.

 

[Chris142]

Same idea did not work for the Vega 50 years ago.

 

[2EHA]

I can’t think of a single reason to use this technology over steel cylinder liners, except weight savings. Saving weight in the bore area of an engine, especially a Porsche engine, seems insane to me.
Steel liners add maybe 6lbs to an engine (guessing); I’ll take the extra weight gain to improve longevity.

Seems to work fine for MB and BMW. Most of the engines with their heads off have this dull smooth silver kind of a finish on their walls. Just weird how Porsche continues to suffer with this whereas other brands have no problems.

 

[ollie]

I'm all for the Nikasil coating. In the powersport world it is used a lot. I have nothing but good to say about it. The only downfall to it is normally induced when cleaning the bore. It's easy to chip if you are not careful near the edges of ports, top/bottom of cylinder.

Same idea did not work for the Vega 50 years ago.

My Vega was a big oil burner!!!

 

[2EHA]

I'm all for the Nikasil coating. In the powersport world it is used a lot. I have nothing but good to say about it. The only downfall to it is normally induced when cleaning the bore. It's easy to chip if you are not careful near the edges of ports, top/bottom of cylinder.

my 99 Jag has Nikasil bores, compression is real healthy and i’ve never heard of issues outside of sulfur dissolving the coating when they first rolled out.

in 2000 they decided to just press in steel sleeves and call it a day. I’m sure there’s some places that still have questionable fuel.

 

[willbur]

Just got done changing the oil on a friend’s 06 Cayenne S and just read up on some supposed cylinder scoring issues plaguing multiple different Porsche engines. Apparently the block is an Aluminum-Silicon alloy and if the hard silicon layer is worn out the engine begins to lose compression.

A couple of my old MBs had their blocks made with the same kind of technology and I’ve never heard of this being a problem. When you see those cars at the junkyard with heads off they usually have an impeccable cylinder finish, whereas apparently all porsches suffer scratching to some extent.

Some especially seasoned forum warriors are saying that LM Ceratec of all things have restored compression, oil consumption and overall worked miracles. Would there be any additive preferable for this sort of application?

I can’t think of a single reason to use this technology over steel cylinder liners, except weight savings. Saving weight in the bore area of an engine, especially a Porsche engine, seems insane to me.
Steel liners add maybe 6lbs to an engine (guessing); I’ll take the extra weight gain to improve longevity.

Just got done changing the oil on a friend’s 06 Cayenne S and just read up on some supposed cylinder scoring issues plaguing multiple different Porsche engines. Apparently the block is an Aluminum-Silicon alloy and if the hard silicon layer is worn out the engine begins to lose compression.

A couple of my old MBs had their blocks made with the same kind of technology and I’ve never heard of this being a problem. When you see those cars at the junkyard with heads off they usually have an impeccable cylinder finish, whereas apparently all porsches suffer scratching to some extent.

Some especially seasoned forum warriors are saying that LM Ceratec of all things have restored compression, oil consumption and overall worked miracles. Would there be any additive preferable for this sort of application?

Why come here for advice? Few here own Porsche’s so don’t follow these issues. Visit Porsche forums, contact specialists, dealers, PCA. I have a Porsche and this is the first I have heard of this specific problem. Remember, there is a lot of internet hysteria out there about these cars. Porsche owners are susceptible to this as few actually work on a car. Contact the Pedro Porsche site and talk to him. Helpful guy. He discusses Porsche’s as he rebuilds and races them.

 

[ollie]

Why come here for advice? Few here own Porsche’s so don’t follow these issues. Visit Porsche forums, contact specialists, dealers, PCA. I have a Porsche and this is the first I have heard of this specific problem. Remember, there is a lot of internet hysteria out there about these cars. Porsche owners are susceptible to this as few actually work on a car. Contact the Pedro Porsche site and talk to him. Helpful guy. He discusses Porsche’s as he rebuilds and races them.

I figured the OP was asking for advice because he does work on his car. All the Porsche owners I know do almost all their own servicing and repair to their vehicles. With the exception of the electronics they are a very simple vehicle to work on.

 

[willbur]

I figured the OP was asking for advice because he does work on his car. All the Porsche owners I know do almost all their own servicing and repair to their vehicles. With the exception of the electronics they are a very simple vehicle to work on.

All two of them? Have they experienced this “problem”? Not so simple. Try doing the ims bearing with 5 timing chains to contend with. Must be old cars bc newer ones are all electronics.

 

[2EHA]

Seems to be a whole company dedicated to doing Porsche engine rebuilds using Nikasil plating as replacement. Reconditioned blocks cost upwards of a whopping 5k.

Nickies Block Sleeving and Nickies Lite Direct Nikasil Plating and Engine Reconditioning for Porsche Engines

Let the bore scoring experts at LN sleeve your Porsche engine with Nickies billet AL NSC-plated sleeves to prevent costly Alusil & Lokasil block failures.

lnengineering.com

On the BMW side these guys are sleeving engines to within an inch of their life for performance applications.

Are cylinder sleeves bad for your BMW engine?

www.vacmotorsports.com

 

[OVERKILL]

Seems to be a whole company dedicated to doing Porsche engine rebuilds using Nikasil plating as replacement. Reconditioned blocks cost upwards of a whopping 5k.

Nickies Block Sleeving and Nickies Lite Direct Nikasil Plating and Engine Reconditioning for Porsche Engines

Let the bore scoring experts at LN sleeve your Porsche engine with Nickies billet AL NSC-plated sleeves to prevent costly Alusil & Lokasil block failures.

lnengineering.com

On the BMW side these guys are sleeving engines to within an inch of their life for performance applications.

Are cylinder sleeves bad for your BMW engine?

www.vacmotorsports.com

There's definitely a market for sleeves regardless of the marque because you can't bore and re-hone an alumasil/nikasil bore, so if you are doing a rebuild, you have to sleeve it. I recall some guy on M5board who was doing a huge performance build and he sleeved his engine.

 

[928]

Common problem on older Cayennes - no idea if it has been solved- snake oils additives won't fix it- google it

Cayenne cylinder scoring.

Hi all, had a friend mention to me today that he’s experienced terminal cylinder scoring on TWO Cayennes. Wondering if anyone else has experienced this issue? Jeff

www.porsche.ab.ca

 

[willbur]

Seems to be a whole company dedicated to doing Porsche engine rebuilds using Nikasil plating as replacement. Reconditioned blocks cost upwards of a whopping 5k.

Nickies Block Sleeving and Nickies Lite Direct Nikasil Plating and Engine Reconditioning for Porsche Engines

Let the bore scoring experts at LN sleeve your Porsche engine with Nickies billet AL NSC-plated sleeves to prevent costly Alusil & Lokasil block failures.

lnengineering.com

On the BMW side these guys are sleeving engines to within an inch of their life for performance applications.

Are cylinder sleeves bad for your BMW engine?

www.vacmotorsports.com

Got your answer? I think this is limited to a very small population of cars (and racing). Like the way overblown IMS bearing issue. Since your friend works on his own porsche, he must be aware of a compression test, leak down test, or a comparative compression test with a scanner. Have his answer in an hour ( 5 min with the scanner). All easy to do. Test results speak loudly and clearly over opinions or i-net searches. Good luck