Bore & Stroke a 3.3L V-6 - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat
 
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post #1 of 13 (permalink) Old 10-19-2001, 11:38 PM Thread Starter
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Bore & Stroke a 3.3L V-6

Has anyone ever attempted to bore and stroke the 3.3L V-6 in an Intrepid? The Chrysler 3.8L V-6 used in some of the older minivans is basically an bored and stroked 3.3L. Can anyone think of any reason why this wouldn't work?

The reason I ask is that I fear I may need to replace the head gasket on my 1993 Intrepid ES with 129,000 miles. While I have my engine half-apart, might it be not too much harder to perform this change and add a little oomp to this slow car?

Thanks.
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post #2 of 13 (permalink) Old 10-20-2001, 12:58 AM
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the only thing i would think is that maybe the computer will shit a brick trying to sort out what changes were made.
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post #3 of 13 (permalink) Old 10-20-2001, 01:08 AM
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you have an ES with a 3.3?.....
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post #4 of 13 (permalink) Old 10-20-2001, 01:13 AM
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I also have an es with a 3.3.....I dont know why it is an es, the only special things i have are the rims, message center, folddown armrest in back and power seats....everything else standard
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post #5 of 13 (permalink) Old 10-20-2001, 04:04 AM
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computer should really have no reason to shit a brick, because the only thing in there that I could imagine being Mucho different is the Rate of flow for the air. and the MAP sensor takes care of that. Might be a little tough on the tranny, because the shift points are geared for the lower HP.
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post #6 of 13 (permalink) Old 10-21-2001, 03:13 PM
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Well if that is the case all you would have to do is the reprogram technique for the transmission.
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post #7 of 13 (permalink) Old 10-21-2001, 09:52 PM
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Besides the trans will learn new tricks when it's up and running again.
Personally, I'd look into Bagging a 3.8 from a Town and Country or Dynasty if I could. I think they will bolt in O.K. I could be wrong though. Boring the block is straight forward, but to "sroke" it you'd be better off getting the bottom end of a 3.8 anyway. That way the crank and pistons and rods are all correct rather than choosing a special oversize set.
What makes you think you popped a headgasket?
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post #8 of 13 (permalink) Old 10-22-2001, 08:18 AM
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Why not get the head gaskets changed. $800 at your Chrysler dealer if you get both done. Then sell the car, and get a 3.5. You could put the extra few grand you would spend on mods into a better car.
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post #9 of 13 (permalink) Old 10-22-2001, 10:32 AM
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on the 3.5, the head gasgets cost MUCH MORE to change than that. Upwards of $2000 from the dealer. how can the 3.3 be so much less?
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post #10 of 13 (permalink) Old 10-22-2001, 01:03 PM
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Lafrad, you must be including new heads. Just to change the head gaskets doesn't cost that much.
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post #11 of 13 (permalink) Old 10-22-2001, 03:27 PM
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Chrysler dealer here in town said it would be over $2000 for the head gasgets. They Said $700 for just the water pump. Parts alone for the 3.5 (head gasgets, other gasgets needed for chainging) are $300+ if you go all aftermarket. add in water pump and timing belt ($120+), tensioner pully (if needed, $50). Took mine to a garage instead, got the price down to $1500 to get it done (including Cutting the heads and cutting the valves/valve seats). Couldn't justify $800 and 3 weeks or more of my own work outside in the Cool wisconsin fall to do what they got done in 4 days.

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post #12 of 13 (permalink) Old 10-22-2001, 04:16 PM
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I phoned my local dealer one time, and they said $800 to do both head gaskets. They must have given me the wrong info.
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post #13 of 13 (permalink) Old 10-22-2001, 10:08 PM Thread Starter
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My mechanic is telling me $1200 to fix head gasket. Says coolant is leaking out. I have been experiening shitty power delivery possibly because leak of coolant into cylinders? Car goes to mechanic for further inspection tomorrow.
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