Replacing a 4.7l with a 5.9l

Peacebythesea · 09-22-2009, 06:05 AM

I have a 2002 ram 1500 4.7l and manual tranny. I blew the engine for the second time in 100,000 miles i love the truck but the engine sucks so i am thinking about replacing the 4.7 with a 5.9. Can anyone give me an idea what else i'm going to have to do to make my truck compatable with a 5.9l?

Thanks

Dash · 09-24-2009, 08:26 PM

My '02 Dodge has the 5.9 and it's a bulletproof motor. Mine now has 130,000 hard miles and so far, I've replaced the belt twice, changed the spark plugs once, and changed the oil every 5000 miles. Motor has never been serviced.

Swapping your 4.7 though would be a tricky job. Sure the motor will bolt right up but you also have to change the computer. Then program the computer. I think the radiators are also different. 5.9 gas mileage is way lower than the 4.7 too. Have you tried looking for a 2nd generation 4.7? That'd be an easier swap.

Peacebythesea · 09-24-2009, 10:36 PM

THANKS FOR THE REPLY I'D HEARD THE 5.9's WERE BULLET-PROOF FIGURED IT BE A HASSLE. THINK I FOUND A COMPANY WITH A 2nd GEN 4.7 . I LOVE MY 4.7... WHEN ITS RUN'N AN WHEN IT RUN'N I RAN IT HARD! THANK FOR YOUR TIME.

A WISE MAN ONCE SAID "A WASTED YOUTH IS BETTER BY FAR THAN A WISE AND PRODUCTIVE OLD AGE" -MEATLOAF

bradrhale · 09-25-2009, 10:59 AM

5.9 is a good solid engine but she tends to be thirsty. few numbers though. the 5.9 magnum with MPFI comes stock with 245 hp and 345ftlbs of torque. the 5.7 hemi which gets alot better gas mileage than the 5.9 magnum comes stock 345hp and 375 ftlbs of torque. yeah it costs a bit more but what does 100 horses costs on an engine. probably worth the costs if you do it by the numbers.

09-22-2009, 06:05 AM	#1
Peacebythesea Junior Member Join Date: Sep 2009 Posts: 3	Replacing a 4.7l with a 5.9l I have a 2002 ram 1500 4.7l and manual tranny. I blew the engine for the second time in 100,000 miles i love the truck but the engine sucks so i am thinking about replacing the 4.7 with a 5.9. Can anyone give me an idea what else i'm going to have to do to make my truck compatable with a 5.9l? Thanks

09-24-2009, 08:26 PM	#2
Dash Full Member Join Date: Jul 2009 Location: San Francisco Posts: 14	My '02 Dodge has the 5.9 and it's a bulletproof motor. Mine now has 130,000 hard miles and so far, I've replaced the belt twice, changed the spark plugs once, and changed the oil every 5000 miles. Motor has never been serviced. Swapping your 4.7 though would be a tricky job. Sure the motor will bolt right up but you also have to change the computer. Then program the computer. I think the radiators are also different. 5.9 gas mileage is way lower than the 4.7 too. Have you tried looking for a 2nd generation 4.7? That'd be an easier swap. __________________ '71 Cadillac Eldorado convertible '71 Karmann Ghia convertible '89 Dodge W150 4x4 '92 Acura Legend '02 Dodge Quadcab 4x4

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09-24-2009, 10:36 PM	#3
Peacebythesea Junior Member Join Date: Sep 2009 Posts: 3	THANKS FOR THE REPLY I'D HEARD THE 5.9's WERE BULLET-PROOF FIGURED IT BE A HASSLE. THINK I FOUND A COMPANY WITH A 2nd GEN 4.7 . I LOVE MY 4.7... WHEN ITS RUN'N AN WHEN IT RUN'N I RAN IT HARD! THANK FOR YOUR TIME. A WISE MAN ONCE SAID "A WASTED YOUTH IS BETTER BY FAR THAN A WISE AND PRODUCTIVE OLD AGE" -MEATLOAF

09-25-2009, 10:59 AM	#4
bradrhale Senior Moderator Join Date: Apr 2006 Location: Texas Posts: 8,014	5.9 is a good solid engine but she tends to be thirsty. few numbers though. the 5.9 magnum with MPFI comes stock with 245 hp and 345ftlbs of torque. the 5.7 hemi which gets alot better gas mileage than the 5.9 magnum comes stock 345hp and 375 ftlbs of torque. yeah it costs a bit more but what does 100 horses costs on an engine. probably worth the costs if you do it by the numbers.