Rotation direction?

[ElEsprito]

Probably the silliest question on this forum, but the 907 engine is turning clockwise, correct? That is: when I'm standing in front of the engine at the timing belt end of it, then turning the crank clockwise rotates the crank in the correct direction?

What normally tells you which direction the engine turns?

Rgds

Dennis

[andydclements]

Normal method to determine direction is, look at valves/ cams.

Think of suck squeeze bang blow. Now, that also works as blow suck squeeze bang (just starting in a different point, so the exhaust valve and the inlet valve are normally open momentarily at the same time (or have no significant period between exhaust closing and inlet opening). Turn the engine the right way and you'll see the inlet opening and the exhaust closing simultaneously. turn the wrong way and you'll see the inlet closing and the exhaust opening simultaneously.

[lotus4s]

In the absence of sucking, banging and blowing, clockwise is the correct direction when viewed from the front....

[molemot]

Easy tip....cambelt will be pulled by the crankshaft pulley, and the tensioner is always in the slack side of the belt...so the belt from the crank pulley pulls the exhaust cam, then the inlet, then the auxiliary and next comes the tensioner before you get back to the crank again. So, yes, it turns clockwise when viewed from the crankshaft pulley end.

[Rich H]

pretty sure 90% of manufaturers have their engines running clockwise when viewed fomr the front. IIRC Hondas generally run backwards!

[DanR]

With some exceptions, think back to when engines were hand started with a crank handle if you're unsure.

[ElEsprito]

Great, thanks a lot. This confirms a few thoughts I had after staring at it for 15 minutes!