Can someone point me to some reference data or explain the basic engine differences between the Cooper and S bedsides the turbo? Are there any other differences in the block, pistons, cams, valves etc?

What is the biggest contributor to carbon buildup and does the Cooper seem to have less of a problem with that than the S?

And are the manual transmissions the same?

Thanks

 

N14 Cooper S engine is direct injection. That's the biggest contributor to carbon buildup. Every direct injection engine has that problem. Even Porsche and Audi!

 

The manual trans and clutch are the same in the Cooper and Cooper S.

 

The modern (current) engine is the N18.

It has different ECU software, dual VANOS, and a major resign in the PCV area to help prevent the carbon issue.

Ford, and Lexus do not have carbon issues... It's not every manufacturer. The early Euro cars made some mistakes, but all seem to be doing much better now.

 

I have 2007 MCS, what is my best bet to Prevent most of the Carbon build up?
Catch Can or the blocks that are sold to go in the PCV lines, or?

 

I don't think you can prevent it... Only slow it down. I think a combination of catch can, PCV block, and Seafoam fogger are all good ways to slow it down.

 

Do not block any PCV ports without also using an OCC, otherwise all that oil will soak the intake with oil! OCC can slow the carbon buildup but not stop it completely, OCC is better than nothing.

 

N/a

 

PCV has a very real function, mainly to vent crank pressure (under load/boost) from the crank area (oil pan). Pressures must be vented (and scavenged) to prevent external oil leaks and sludge.

While the stock N14 Mini/Peugeot design sucks, you should still have some method to vent crank pressures.

Trust me, your putting a TON of stress on gaskets and seals in the engine.. Rear main, crank, oil pan, cam cover.. etc.

You should never block off 100% of the ports.

 

N/a

 

Sorry, the way you had replied to the post above yours it sounded like you were saying you had blocked off 100% of the ports and all was still ok.

And I didn't say soaked in oil, the other dude did. Passenger side block offs are perfectly fine.