Ed,
This is a high output all aluminum engine. It is putting out almost
73HP per liter. This is well over 1 HP per cubic inch. Do not run this
engine with out a proper mix of coolant and water. Electrolysis and
severe corrosion will occur. Even just sitting there will be corrosion
occurring.
There will also be localized overheating that will not show up on
the temperature gauge. The engine will quickly be severely damaged. In
fact because this engine was run with the system being unpressurized it
may already be too late. I am an expert in these HO engines used in
Japanese and European vehicles. I can not over state this.
Thanks,
rich!
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On 9/15/2014 2:13 AM, edbreya@... [TekScopes] wrote:
I did mention it in the original post, but it's hard to see older
messages with this wonderful yahoo system. It's a 2007 BMW X5 4.8i.
It's amazing how much plastic is used in modern cars, and how well it
works - up to a point. In the good old days of copper and brass you
could just solder these kinds of things and know it would be OK.
I put it back in tonight and ran it at idle until the water started to
boil out, then capped it up. So far it has held at pressure and
temperature for a half-hour or so of idling, so it's probably OK as a
temporary fix, but there will always be some doubt. Right now the
coolant is almost all water, since so much was lost and refilled - it
tends to boil off easily, putting more stress on the system. I'll be
correcting the mixture to the usual 50:50, after I put in a new tank.
For now, we'll probably do a car switch and I'll drive it for a while,
and carry some extra water, tools, and epoxy for possible field
repairs, until it's resolved.
Ed
