Fram HM3593A Cut Open - Engine failure

[Sayjac]

Quote:
Fascinating information. So it appears some of the major Japanese manufacturers are intentionally spec'ing low efficiency filters, since the Toyota OEM is also known to be a very low efficiency filter. Since it appears intentional, I wonder what the reasoning could possibly be?

I'll tell you the possible explanation I got when I asked the question last fall at the Fram Labs. The lead engineer said that in Japan because of very strict emission testing and inspection laws cars are generally certified for a relatively short period then sold used in other countries. I googled this idea and found it easily on Wikipedia under the topic Japanese used car exporting. Others here have stated that it's because Honda recommends using an oil filter for two oci's. But, Honda is the only 'major' Japanese auto maker that has such a recommendation, not Toyota, or Mazda or Subaru, so I'm more skeptical about that explanation.

Not saying the Japan certification explanation is definitely the reason, but I think it's plausible. And imo, I don't believe Honda and Toyota know more about oil filtration, than other auto makers or the aftermarket filter companies which make filters for those vehicles. Especailly true since it's those aftermarket companies that make the OEM filters.

 

[cptbarkey]

cleaning up the garage for the ressurection project and snapped pics of more engine carnage.

first one is the camshaft which is gouged.
second valve is missing and very chewed up.
third two pistons, the bore is glazed.
forth under the oil pan looking at the crankshaft.
fifth is the missing piston and cracked bore.

http://imgur.com/a/z5ZWM

i will split the block someday to look at the crank and bearings, but rounded the final case bolt so have to drill the head of the bolt off eventually.

looking at the second picture is interesting, burned areas where the head gasket is supposed to seal the water jackets, so i suppose it was a combo head gasket failure? or could just be residual head gasket material.

 

[bpracer]

That engine dropped a valve. Oil filter had absolutely nothing to do with it.

 

[bullwinkle]

+1-blown head gasket, valve dropped, piston disintegrated. Lots of coolant corrosion in that cylinder head-it was bad for a WHILE!

 

[wag123]

Originally Posted By: ZeeOSix
Originally Posted By: wag123
An oil filter's flow rate could be a VERY important specification in vehicles that use variable displacement/flow oil pumps. I don't know if Honda is using them (yet) but Chevy, Ford, Chrysler, BMW, Mercedes, Renault, and Toyota definitely are.


How do those types of oil pumps differ in design from a good old positive displacement oil pump?

Oil filter restrictiveness to the engine's oiling system shouldn't be a problem with a solid positive displacement oil pump.

A variable displacement oil pump basically gives you a lower horsepower draw because it pumps less oil under situations when the engine doesn't need the higher flow (like having a much smaller pump) and is able to pump a lot more oil when required (like having a much larger pump). Efficiency is the reason for it. The car manufacturers are doing everything they can to improve efficiency to improve fuel mileage. An oil pump that is capable of pumping 4 or 5 times what is actually needed in a given situation (and going into bypass mode) is wasting horsepower and fuel. I can see where an oil filter's flow rate can seriously affect the function of this system.