what other models engines fit in my 2003 trep! - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
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post #1 of 13 (permalink) Old 05-20-2012, 02:03 AM Thread Starter
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what other models engines fit in my 2003 trep!

Hey everyone my mom passed on her old intrepid to me! A little info on it i replaced the waterpump on it myself its the 2.7 l ad frankly its just not fast enough and the engine has 200k on it soo i think it's time for something better! So what engines from what models could i fit in there! Im no stranger to making things fit my first caris 67 parisienne with a 86 fuel injected engine from a firebird!... would a charger 3.5 fit the lh tranny????
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post #2 of 13 (permalink) Old 05-20-2012, 02:30 AM
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The best thing to do is buy Dan's swap manual, and swap in a 3.5 HO from another LH car.

Anything else and you're barking up a BIG tree. Sure, not impossible - but the reality is, this is not an '67 Pontiac with a simple 1986 swap...
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post #3 of 13 (permalink) Old 05-20-2012, 03:16 AM
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Try the search feature. its pretty handy
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post #4 of 13 (permalink) Old 05-20-2012, 03:23 AM
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Get Dan's book are do a lot of research.

Only "quick swap" engines would be a 3.2 and 3.5. To save yourself a lot more work, when shopping for a motor, you need one within the years of 2002-2004 to fit your 2003. Between 1998-2001, and 2002-2004 they deleted some things such as the EGR valve, oil coolers and other small things, and changed wiring harnesses etc. You can make a off-year model engine work but it requires more work like swapping timing gear(s) and intakes etc.

You'll need a complete drop too. Power steering, alt, a/c, engine mounts (literally a complete drop), the engine harness, some hoses, the transmission dip-stick tube; to name some big things to help you in the mean time search around.

Engines in the LX platform cars (Charger, Magnum, 300 etc) are the same identical engines. Intakes were redesigned, that's about it. But as said, your barking up a more difficult tree which will require a lot of wiring hassles, maybe a few mechanical timing issues to cooperate with different electrical components.

That said, if the 2.7 in your car has been well run through it's life time, never "granny" driven, it should produce excellent power as it won't be improperly broken in or carbon'd up. My 2.7 floats, literally smokes all my buddies fancy new Lancer's, even my friends la-de-da Mustang (highway we're talking here), 240KM comes quicker then any of them can touch 180KM. There are small things to do to pep it up such as true dual exhaust, cold air intake, bored out throttle body, port and polish heads, LX platform intake, bored throttle body, even a 300M SPECIAL PCM, which will even bring a 3.5L to life.

You'll gain from a 3.5 swap now though. Drop the 3.5 in and loose the waterpump worries, gain power and have a 2.7 in running shape to turn around and sell or keep for spare. Best part, you'll have 2.7L final drive gears on your tranny, so that 3.5 just got a bigger kick in the pants!

Lots you can do, just a matter of what you can get done or wanna spend.

Last edited by UPGI2AYDD; 05-20-2012 at 03:27 AM.
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post #5 of 13 (permalink) Old 05-20-2012, 03:32 AM
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Just be aware even with the 2.7 gears and the 3.5L HO the LH platform isn't a speed demon, and there's no way to get around that; our transmissions can't handle much more power than is given by the 3.5L, among other issues.
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post #6 of 13 (permalink) Old 05-20-2012, 03:54 AM
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Quote:
Originally Posted by Vilgent View Post
Just be aware even with the 2.7 gears and the 3.5L HO the LH platform isn't a speed demon, and there's no way to get around that; our transmissions can't handle much more power than is given by the 3.5L, among other issues.
What's up with that I thought they were tough, minus the valve pack..???
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post #7 of 13 (permalink) Old 05-20-2012, 03:59 AM
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What's up with that I thought they were tough, minus the valve pack..???
I'm not saying otherwise, but you mentioned transplating a Firebird engine into another project, so I just wanted to let you know that even with the stars aligning in terms of performance options the LHs still aren't going to be speed demons.

The 3.5L will be more reliable and notably faster, but even then just be looking at it from a reliability standpoint, rather than any sort of pure-bred performance gain.

Last edited by Vilgent; 05-20-2012 at 04:02 AM.
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post #8 of 13 (permalink) Old 05-20-2012, 09:12 AM
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Originally Posted by zerokool View Post
What's up with that I thought they were tough, minus the valve pack..???
I guarantee that unless there was an "aren't" in there somewhere no one has ever said "LH trans" and "tough" in the same sentence. They'll handle stock power forever without trouble, but most members have found that adding a lot of additional power up front will eventually cause problems in the trans.


As for the OP yes, get a 2002-2004 3.5HO from another LH, keep your 2.7L gears in the trans, and enjoy the tire roasting fun. Special PCM and a few other things will help (look up Shadowvox's mods), She'll throw ya back in the seat plenty nice.
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post #9 of 13 (permalink) Old 05-20-2012, 11:53 PM
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With the 2.7, you'll smoke all the ricer's and what not. Go the extra mile with the 3.5L and other goodies and you'll be all that more happier. But in short don't expect to shift into gear one, burn a pound of rubber, slam it into gear 2, burn another pound etc. She'll never do what old fashion muscle cars would do but top end she is all there.
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post #10 of 13 (permalink) Old 08-08-2012, 05:36 PM
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problem with car dying while at traffic light radio goes out then lights and dies and would not start back up cliking sound or nothing at all when i turn the key after a jump start the car is back to normal. please

Last edited by georgeovargas; 08-08-2012 at 05:40 PM.
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post #11 of 13 (permalink) Old 08-08-2012, 08:29 PM
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low or dead battery alternator not charging or bad connections at battery or bad connnection at the jump posts bad connnections can be intermittent allowing it to run but then cuts off starter pulls a lot of current so the bad connection can't make it spin the motor but if you jump it enough power is supplied just to run things until the connection deteriorates again due to heat or going over a bump or who knows what punctuation and capitalization make it easier to read try using it please thank you
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post #12 of 13 (permalink) Old 08-08-2012, 08:35 PM
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^^lmao!
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post #13 of 13 (permalink) Old 08-08-2012, 08:41 PM
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