Quote:
Originally Posted by husker boxster
Steel dissipates heat at different rates (slower) than aluminum, so your engine runs hotter. You'll also have potential trouble with head gaskets. This isn't an issue when they're used in race engines since those are rebuilt more often than a street engine.
But if I'm having to rebuild every 4 yrs, maybe I have a race engine. 
I would just like to know if it was something I did or if there was an error made assembling last time. The #6 cyl was good and that's the one that always fails. |
Yes, i know that steel has a different expansion coefficient that aluminium. But it seems to work. Over here in Germany we have different engine builders that are specializes in that topic for M9x6 and Mx7 engines. It works. But there are a lot of things to take into consideration. Gaskets is only one.
A full engine rebuild every 4 years is definitely not the way to go.
I would check if the piston ring clearance was OK and if they were mounted in the right direction. Also i would check if the cylinders are really round over the whole length. The oil supply for the oil spray nozzle for that cylinder might also have caused a problem. And of course you have to check the overall piston clearance.