UK Bloke said:
Hi
Rode my S10 for the first time today, engine isn't as quite as I had hoped, sounds like a cam chain rattle, local dealer says "they all sound like that" - do they?
Ta
It's a "dry" sump motor. It has no oil bath in the bottom to damp vibrations. They sound like a bucket of bolts because all the noises get bounced around and the sump plate is not damped by much oil.
Why did they do this?
The engine is can be mounted 2 Inces lower lowering the COG.
The pistons don't have to wade through oil so it allows better fuel economy than would otherwise be achievable.
If you blow a hole on your "sump" you don't loose all your oil straight away. If you notice it quickly you can fill the hole without all the oil draining.
The downsides is the engine sounds like a bucket of bolts.
Function over NVH is what it is.
The only way to know for sure is to find another one and compare, but the are not quiet motors in that regard.
Once you have answered that, you can go onto asking why the radiator is mounted on the side ;D