2006-2009 Honda Civic engine blocks cracking

[anon86613489]

@oldtimer-11

I have always wondered why anyone bothered to make an F head engine ( overhead intake valve and exhaust valve in the block). The last one I can recall was used in some post WWII Willis .

Rover used IOE (F-head) straight sixes in the P4/P5 engines up to -67, where it got replaced by the Buick V8.

[VDCdriver]

@oldtimer-11

The only example I can think of is the Mercer.

And, speaking of the fantastic Mercer automobile, the family that manufactured it–The Roeblings–were the same folks who designed and built The Brooklyn Bridge.

[Triedaq]

@oldtimer-11 I think the reasoning behind the F-head engine was that the exhaust valves would run cooler in the block while having the intake valves in the head gave a better fuel flow into the cylinders.

[shadowfax]

@db4690

I can’t swear to it, but I think I may have seen older cars where 55mph had a prominent red line on the speedometer, perhaps to remind you of the speed limit

You’re remembering right. I had a number of cars which had the 55 highlighted. That little feature went away as soon as the feds loosened their stranglehold on speed limits.