Hey all. Question. can anyone tell me exactly what type of metals does Honda use in their engines, particularly the Acura's (NSX, TL, RL etc.)? I know generally that it is an Aluminum engine, but for example what are the piston rings made out of? How about connecting rods and other internal combustion components? Do they use Magnesium and Titanium? Or are these types of Metals typically found on Higher end Automobiles? Also Why SOCH as opposed to DOCH for the TL? What are the diffrences say in the Tolerance specifications of Honda relative to GM, Ford, Chrysler?

What makes the Japanese Automobile have such a far superior track record in comparison to the domestics?

Answers anyone? . . . . . .

 

I don't know the exact metals that each engine uses, but I'm guessing that the piston rings are molybdenum coated steel. Connecting rods and pistons, also steel. I know the TSX 6MT uses a magnesium casing to reduce weight. Some aftermarket tuner companies offer titanium valve springs.

I would assume SOHC was used in the TL just because its cheaper due to having fewer parts. DOHC is geared more for performance, and the TL isn't exactly a performance car.....

I don't know the exact specs for tolerances between manufacturers but I guarantee you, you can get tighter tolerances than factory by having it redone by a machine shop.


People really need to get out of the mindset that X manufacturer makes more reliable engines than Z manufacturer. It really all depends on what that manufacturer focuses on in regards to R&D, therefore they usually specialize in a certain engine type. I doubt Honda will ever make a pushrod the way GM does. And whose to say GM's engines have a poor track record? Obviously though, some manufacturers put much more engineering into their engines than others, though the result of which isn't always obvious.

Its the overall collective of the car itself, interior, apparent quality of materials, fun to drive factor, etc. Nowadays usually the engine is one of the lowest maintenance components in a car. Electronics, and supporting components of the engine are usually more trouble than the engine itself.

On a sidenote I admire the use of timing chains as opposed to timing belts.

 

Pistons are aluminum, rods and cranks steel. Block and heads can be either depending on manufacurer.