2.7 abd 3.2 Differences?

**Jimsmag06** · 08-17-2007, 02:21 PM

OK, guys, I need some help.
I need everyone to talk to as many dodge people as they can, so we can try to determine what differences there were between the 2.7, and the old 3.2.
I was looking at Allpar, And they speak of the two engines, as if they were DOHC, 24Valve siblings......
If this is the case, we may have a possible stroker parts bin for the 2.7!
Lemme know!

**lafrad** · 08-17-2007, 02:30 PM

The 3.2L engine has nothing to do with the 2.7L engine.

The 3.2L engine is the same block, heads, and crank as the 3.5L engine.. just smaller bore size and pistons.

**DannyC** · 08-17-2007, 02:34 PM

Good thinking tho. I'm still trying to figure how I can get my hands on a Nitro 4.0 cheap to find out if heads, etc are interchangable.

**Jimsmag06** · 08-17-2007, 06:08 PM

Dammit!
Why cant they just make things simple, and base all v6`s off the 3.5?

**lafrad** · 08-17-2007, 06:12 PM

The 2.7 is a very powerful engine for the size it takes up.

It can move the light-er weight Stratus's quite well, and it does well on fuel milage and how quiet it is.

It was designed with that small external package size in mind.

The 3.5 was not as concerned with the engine bay size, as the smallest vehicles it was deisgned for are intrepids and pacifica's.

It comes in the 3.2/3.5/4.0 varieties.

If you check the www.dodgeintrepid.net forums, you will see that there are quite a few people who installed 3.2 and 3.5L engines in their 2.7L cars.

I can't imagine the procedure would be that far off base for the LX platform cars.

**Jimsmag06** · 08-18-2007, 02:37 PM

Originally Posted by lafrad

The 2.7 is a very powerful engine for the size it takes up.

It can move the light-er weight Stratus's quite well, and it does well on fuel milage and how quiet it is.

It was designed with that small external package size in mind.

The 3.5 was not as concerned with the engine bay size, as the smallest vehicles it was deisgned for are intrepids and pacifica's.

It comes in the 3.2/3.5/4.0 varieties.

If you check the www.dodgeintrepid.net forums, you will see that there are quite a few people who installed 3.2 and 3.5L engines in their 2.7L cars.

I can't imagine the procedure would be that far off base for the LX platform cars.

I love dodgeintrepid forums!
I would assume that the big problem would be the computer and harness, as I don`t believe its a stand alone system that is separate from the Chassis harness....And not to mention, the second manifold tuning valve. Please correct me If Im wrong, but I dont think the LH`s have the Tuning valves.
I would love to have a cable operated Throttle body, or evan a flash, to make the pedal/throttle body 1:1

**cm2005300** · 08-25-2007, 08:33 PM

The Diffrence Is About .5

**MagNite** · 08-25-2007, 10:59 PM

I had a 2.7 Intrepid and the only major thing I had to do with it was replace a water pump at 100K. I used Mobil 1 From about 35k till 110k when I got rid of it. Good motor. I beat the hell out of it every day for 5 years and it just wouldn't die. I've been a member of Dodgeintrepid net for years now. Some guys on there changed the 2.7 out to a 3.5 but then had problems with the computer. These days with the computer and sentry key feature, it's not so easy to swap engines.

**Jimsmag06** · 08-26-2007, 12:51 PM

Originally Posted by cm2005300

The Diffrence Is About .5

LoL......My kinda guy!

**lafrad** · 08-26-2007, 02:09 PM

Swapping really shouldn't be that far off... the computers definately will be confused, and there are tuning valves to make sure they match up.

BUT... displacement wise, .5L isn't much... my stroker kit runs without codes on a STOCK computer.... and thats .7L of a bump with an aggressive cam....

And now with B&G able to support you guys, it might be something that works well!

**Jimsmag06** · 08-26-2007, 02:24 PM

Well, This is my thinking.
I would love to have the power of the 3.5, but for me, upgrading to an sxt, would also be a step backwards, IMHO, in reliability.
I know that have only seen 1 case (Chambers)of a 3.5 failure, due to the timing belt, and plastic cogs, but thats the only reported incident that I have seen. There may be more that we don`t know about.
If I do ever get an SXT, you can bet that Ill be checking the belt every 20,000miles, as it looks easy enough to remove the cover, without having to get through too much to get to it.
Or just go all the way, and get an RT....as they can be had for SXT prices in some places.
I would still like to find out ho much the 2.7 could be bored and stroked, but it being a totally different animal, than the rest of the v-6 family which seems to be based on the 3.5, there are no parts available.

**cm2005300** · 08-28-2007, 03:24 AM

Originally Posted by Jimsmag06

LoL......My kinda guy!

im glad someone appreciated that.. but hey atleast my bean isint red yet so i guess thats good

**lafrad** · 08-28-2007, 09:57 AM

the 2.7's and 3.5's reliability has had a LOT of time to work itself out. they have been the workhorses of the Chrysler Large car line since 1999.
Check out that other board www.dodgeintrepid.net and get their views on the different engines...

I would *Highly* suggest that, with the 2.7, you are running proper weight, good synthetic oil, and that you change your water pump/timing chain/chain tensioner at around 75,000 miles. The 2.7's have had an alarmingly high failure rate due to sludge... which I personally think is due to the water pump being contained *inside* the oiled part of the engine.... The Timing belts on the 3.2/3.5's have *usually* had a very good run up past 100,000 miles, and their failure is usually a water pump slipping and puking coolant all over the ground...

**bigal470** · 08-28-2007, 03:22 PM

Originally Posted by lafrad

the 2.7's and 3.5's reliability has had a LOT of time to work itself out. they have been the workhorses of the Chrysler Large car line since 1999.
Check out that other board www.dodgeintrepid.net and get their views on the different engines...

I would *Highly* suggest that, with the 2.7, you are running proper weight, good synthetic oil, and that you change your water pump/timing chain/chain tensioner at around 75,000 miles. The 2.7's have had an alarmingly high failure rate due to sludge... which I personally think is due to the water pump being contained *inside* the oiled part of the engine.... The Timing belts on the 3.2/3.5's have *usually* had a very good run up past 100,000 miles, and their failure is usually a water pump slipping and puking coolant all over the ground...

the 2.7 with the sludge problem was in the older model car my moms intreped had one and she had the motor changed out for that reason... I did many hours of research on this and they did a redesign of the motor starting in are LX.......

**lafrad** · 08-28-2007, 04:24 PM

Originally Posted by bigal470

the 2.7 with the sludge problem was in the older model car my moms intreped had one and she had the motor changed out for that reason... I did many hours of research on this and they did a redesign of the motor starting in are LX.......

okay, cool. maybe the LH'ers should look at picking up a new-model 2.7 in the future then...