can I change a 4 cil to 6 cil

Asked by juanjcj Jan 13, 2012 at 07:45 PM about the 1988 Jeep Wrangler 4WD

Question type: Car Customization

I have a 1988 jeep wrangler  4 cilinder engine can I change the engine to a 6 cil with
out having to change the transmission and it will perform engine and transmition
good

11 Answers

905

Hi you can do any thing you want but more work and Money

3 people found this helpful.
65

I have a 1988 Jeep Wrangler with a Chevy 350 small block, The Bigger your engine, The Bigger you gas bill.( I am sure you know this) Just keep it in mind, Also Keep this in mind...Enjoy Enjoy and again I say Enjoy your Jeep!!! God Bless

6 people found this helpful.
425

Mostly likely for better performance you would want to swap out transmission for different cylinder engine, jus the same if you were to swap for a v8 engine, you would upgrade the tranny as well. Not necessarily the bigger your engine, the bigger your gas bill, engine could possibly jus need injectors cleaned out, spark plugs, fuel filter, air filter maybe even an engine flush. It really depends how you utilize your vehicle's abilities and perfomance.

6 people found this helpful.
425

P.S your also going to have to upgrade radiator, and intake manifolds, and most likely several other essential parts, if you want to maintain the engine and vehicle lifespan. Best to agree with "MALLARD17"!!

5 people found this helpful.
2,165

the 2.5 4cyl does not bolt up to the 4.0 I6 You need: - PCM - Wiring harness - Radiator - Cooling fan - Radiator hoses - Motor mounts - Exhaust (I'm not sure if the stock 4 cyl exhaust down pipe bolts up to an I6 header or not) - Transfer case (you need a 23 spline input or an entire t-case from an I6) - Transmission (you need an I6 transmission. The 2.5 transmissions do not bolt up to the I6) - Driveshaft length modifications (potentially) all in all, not the best use of ur money.....also u have to know, u cant just get new motor mounts, u get new motor mounts, take OFF the old ones and WELD on the new ones....with precision if u want to take this thing wheelin', that 4.0 is a torque monster

20 people found this helpful.
30

Is.there a different transfer case from a different make of car that will fit a 93 4 cyl 2 5 jeep wrangler?

3 people found this helpful.
30

I have a2010jeep wrangler unlimited sport with 3.8 what trans missions will bolt up

3 people found this helpful.
40

Get the A-X 15 tranny and bell housing to mate. Replace motor mounts with those from a 4.0 YJ frame or TJ frame. Robb two injecter harnesses from 4.0 computer plug. Pin 38 for cylinder 5 pin 58 for cylinder 6. Add the two wires to bulk head weld on new brackets in new location .. included are new mount locations..

4 people found this helpful.

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