2006-12-31 09:44:55 · 7 answers · asked by tommyquazar 1 in Cars & Transportation ➔ Car Makes ➔ Jeep
If the engines are in stock form:
4.0: Fuel injected, air filter located to the side of the motor, Some oil filters point upwards making a mess when you change them, only came with a serpentine belt, the thermostat housing has a large spigot pointing 45 degrees to the left and a small spigot pointing 90 degrees to the right.
4.2: Carburated, air filter located on top of the engine, all oil filters point down, most had standard v-belts but some had serpentine belts, the thermostat housing has both spigots pointing 45 degrees to the left.
2007-01-01 07:48:51 · answer #1 · answered by jeepnuk 4 · 0⤊ 0⤋
aside from it saying 1.6 or 1.8 on it, there's really no visual tell between the 2. you would have to find a miata that you knew for a fact had a 1.8 liter and put them side by side to compare. Even then, the differences might not be visible.
2016-05-23 01:12:15 · answer #2 · answered by Anonymous · 0⤊ 0⤋
Look under the hood. It will say on a white tag what size engine it is. the sticker usually has a belt diagram with it. Or it will say on the top 4200 or 4000 so on so forth
2006-12-31 09:58:22 · answer #3 · answered by friend_of_hess 2 · 0⤊ 0⤋
4.0 was 242 CID made from 1987-2006
4.2 was 258 CID made from 1971-1990.
If it is still in a vehicle, look on the emissions sticker, or look for casting numbers on the block.
2006-12-31 13:55:03 · answer #4 · answered by eferrell01 7 · 0⤊ 0⤋
4.0 was fuel injected 4.2 was carb.
4.0 had a solid metal wide valve cover gasket
4.2 some were made of plastic and were narrow
2006-12-31 09:55:06 · answer #5 · answered by cttoughguy 2 · 0⤊ 0⤋
It's usually marked on the manifold.
2006-12-31 09:52:32 · answer #6 · answered by Jack 6 · 0⤊ 0⤋
duh what year is it? and look the white tag on radiator support
2007-01-01 04:02:04 · answer #7 · answered by jamesonleadfoot77 3 · 0⤊ 0⤋