Engine swap - Pirate4x4.Com : 4x4 and Off-Road Forum

kellymoe · 02-05-2006, 11:18 PM

I have the chance to get a used 3.9 with 90k miles on it at a pretty good price. I have a 3.5 now with a edelbrock 1404 carb and edelbrock intake manifold. I am planning on taking the manifold and carb off the 3.5 and moving it to the 3.9, I dont have the time or the money to make the EFI work the wa it should so am sticking with the carb which works pretty well now and have had few problems with that set up. Does anyone forsee problems with this? Things to consider?

PTSchram · 02-06-2006, 04:35 AM

Should be completely straightforward. I'm not sure what you're using for a fuel pump, but you may need to swap the front cover.

kellymoe · 02-06-2006, 08:41 AM

I have a low pressure FP in the fuel tank, I would think I shouldnt have to do anything with it since I am sticking with the carb setup.

PTSchram · 02-08-2006, 08:19 AM

I wasn't sure if you had a mechanical fuel pump driven from the cam-in which case, you would have needed to swap the front cover...

Good luck and let us know how it goes.

If AFI has his way, I'll be doin' an engine swap in my rig sooner than expected.

PT

androbus · 02-08-2006, 09:24 AM

Quote:

Originally Posted by PTSchram

I wasn't sure if you had a mechanical fuel pump driven from the cam-in which case, you would have needed to swap the front cover...

Good luck and let us know how it goes.

If AFI has his way, I'll be doin' an engine swap in my rig sooner than expected.

PT

to what?
i'm still not too excited about using the '89 shortblock in the disco, and since the 4.6 fell through...it's asittin!

Paul

PTSchram · 02-08-2006, 10:04 AM

Sadly, it will be a 4.0 with a hot cam. The 3.9 is very tired, the 4th gear shift valve is shot on the ZF and the LT-230 was run dry for an unknown period of time. The 4.0 that's going in only has ~70K miles and was junked due to arson damage to the passenger compartment (I can sure find them, eh?).

Compared to the mileage on the 3.9, this drivetrain will be new!

I had wanted to do the 4.2 and the whole deal, but with an impending move to Oregon, it was necessary to do something now to be able to wheel it in the interim and also to be able to drive it out west. I just (literally just a few minutes ago) listed the residence and the rental for sale to allow the move.

afirover · 02-09-2006, 05:28 AM

O SHIT
now you have spilled the beans

think of all the children in the world who are going hurry

PTSchram · 02-09-2006, 08:10 AM

Quote:

Originally Posted by afirover

O SHIT
now you have spilled the beans

think of all the children in the world who are going hurry

It's your fawking fault damn you. Now to find the $ for the cam and associated pieces. Don't wanna use a worn out chain/gears.

JSBriggs · 02-09-2006, 09:54 PM

Quote:

Originally Posted by PTSchram

I just (literally just a few minutes ago) listed the residence and the rental for sale to allow the move.

When we moved from PDX we didn't even do that, it was easier to rent out our house than it was to sell it. The day before we left, we rented the house out. We still have it. Our renters have lived there longer than we did. You might consider hanging on to at least the rental.

-Jeff

PTSchram · 02-10-2006, 07:15 AM

Quote:

Originally Posted by JSBriggs

When we moved from PDX we didn't even do that, it was easier to rent out our house than it was to sell it. The day before we left, we rented the house out. We still have it. Our renters have lived there longer than we did. You might consider hanging on to at least the rental.

-Jeff

They are both contiguous and together they are worth FAR more than individually.

02-05-2006, 11:18 PM	#1 (permalink)
kellymoe Registered User Join Date: Oct 2003 Member # 23246 Location: Somewhere in the Saline Valley Posts: 283	Engine swap I have the chance to get a used 3.9 with 90k miles on it at a pretty good price. I have a 3.5 now with a edelbrock 1404 carb and edelbrock intake manifold. I am planning on taking the manifold and carb off the 3.5 and moving it to the 3.9, I dont have the time or the money to make the EFI work the wa it should so am sticking with the carb which works pretty well now and have had few problems with that set up. Does anyone forsee problems with this? Things to consider? __________________ 1988 Land Rover 130 Crew Cab "there are no stupid questions, just inquisitive idiots"

02-06-2006, 04:35 AM	#2 (permalink)
PTSchram Registered User Join Date: Jun 2002 Member # 12499 Location: In a Snap-On truck tryin' to make it pay Posts: 10,561	Should be completely straightforward. I'm not sure what you're using for a fuel pump, but you may need to swap the front cover. __________________ Wrenchin' to riches! If you want peace, prepare for war.

02-06-2006, 08:41 AM	#3 (permalink)
kellymoe Registered User Join Date: Oct 2003 Member # 23246 Location: Somewhere in the Saline Valley Posts: 283	I have a low pressure FP in the fuel tank, I would think I shouldnt have to do anything with it since I am sticking with the carb setup. __________________ 1988 Land Rover 130 Crew Cab "there are no stupid questions, just inquisitive idiots"

02-08-2006, 08:19 AM	#4 (permalink)
PTSchram Registered User Join Date: Jun 2002 Member # 12499 Location: In a Snap-On truck tryin' to make it pay Posts: 10,561	I wasn't sure if you had a mechanical fuel pump driven from the cam-in which case, you would have needed to swap the front cover... Good luck and let us know how it goes. If AFI has his way, I'll be doin' an engine swap in my rig sooner than expected. PT __________________ Wrenchin' to riches! If you want peace, prepare for war.

02-08-2006, 10:04 AM	#6 (permalink)
PTSchram Registered User Join Date: Jun 2002 Member # 12499 Location: In a Snap-On truck tryin' to make it pay Posts: 10,561	Sadly, it will be a 4.0 with a hot cam. The 3.9 is very tired, the 4th gear shift valve is shot on the ZF and the LT-230 was run dry for an unknown period of time. The 4.0 that's going in only has ~70K miles and was junked due to arson damage to the passenger compartment (I can sure find them, eh?). Compared to the mileage on the 3.9, this drivetrain will be new! I had wanted to do the 4.2 and the whole deal, but with an impending move to Oregon, it was necessary to do something now to be able to wheel it in the interim and also to be able to drive it out west. I just (literally just a few minutes ago) listed the residence and the rental for sale to allow the move. __________________ Wrenchin' to riches! If you want peace, prepare for war.

02-09-2006, 05:28 AM	#7 (permalink)
afirover Registered User Join Date: Nov 2004 Member # 38070 Location: indianapolis Posts: 371	O SHIT now you have spilled the beans think of all the children in the world who are going hurry __________________ [COLOR=Gray]AFIROVER[/COLOR] [COLOR=DarkOliveGreen]"Well done is better than well said ." Ben Franklin [/COLOR]

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