Total noob question [Archive]

mscottc

11-22-2009, 02:19 PM

ok so i was looking at my owner's manual and it dose not list the 2.4 ld9 as a option it list the 2.4 l4 with the vin letter being a t now my question is... is the ld9 and the l4 the same engine if so why dose the owner's manual call it by the l4 and if not whats the difference between them?

99alerogirl

11-22-2009, 02:22 PM

I4 just means it's a 4 cylinder in the I shape. it's like saying V6... a 6 cylinder in the V shape.

mscottc

11-22-2009, 02:34 PM

ok cus me and my uncle got into it about it so thanks

Chipmunk-Alero

11-22-2009, 03:06 PM

Sorry but I kinda got to laugh........

mscottc

11-22-2009, 03:44 PM

i thought i was right i just wanted to make sure lol

Valley olds

11-22-2009, 03:45 PM

"I" basically means all pistons are in line, while with a "V" the pistons are to the left and right side of the block (Ex. V4 would have two pistons on the left and two on the right I4 has all 4 pistons in one row) .

Chipmunk-Alero

11-22-2009, 03:49 PM

Pappa Smurf is the only one with a V4

[ion] C2

11-22-2009, 04:51 PM

I believe he's typing "L" when he says "l4" in his original post, not "I." Use capital letters when you're typing something like the L for liter, it eliminates a lot of confusion. The owners manual and many repair guides will call inline-4 engines "L4" to say inline-4. The owners manual of all inline-4s are going to call the engine an L4.... much like all the V8's are going to be called a V8.

The LD9 is the engine code for GM's 2.4L Twin Cam which is the name of that specific engine. Like LS1, LA1, VQ35HR.

01silveralero

11-22-2009, 07:18 PM

2 more different types you may see in different make automobiles would be rotary or flat. flat would be like the "boxer style" engine in a subaru, where the piston are flat/horizontal.

Vic28

11-22-2009, 07:21 PM

and the rotary??? ^ think you forgot it :haha:

01silveralero

11-22-2009, 07:38 PM

and the rotary??? ^ think you forgot it :haha:
rotary is a little bit harder to explain lol. well I'll try.....there's a rotor instead of a piston. the rotor rotates on a output shaft (instead of a crankshaft). the intake and exhaust ports are in the oval-shaped router housing. the rotor travels around three times to complete the combustion cycle.

mscottc

11-22-2009, 10:30 PM

ok so thats what i was thinking and my uncle kept confusing me on it lol he thinks the L4 is a sportier version of the LD9 lol