Bore & Stroke a 3.3L V-6 [Archive] - DodgeIntrepid.Net Forums - Dodge Intrepid, Concorde, 300m and Eagle Vision chat

: Bore & Stroke a 3.3L V-6

10-19-2001, 10:38 PM
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?


10-19-2001, 11:58 PM
the only thing i would think is that maybe the computer will shit a brick trying to sort out what changes were made.

10-20-2001, 12:08 AM
you have an ES with a 3.3?.....

10-20-2001, 12:13 AM
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

10-20-2001, 03:04 AM
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.

10-21-2001, 02:13 PM
Well if that is the case all you would have to do is the reprogram technique for the transmission.

silver ghost
10-21-2001, 08:52 PM
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?

10-22-2001, 07:18 AM
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.

10-22-2001, 09:32 AM
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?

10-22-2001, 12:03 PM
Lafrad, you must be including new heads. Just to change the head gaskets doesn't cost that much.

10-22-2001, 02:27 PM
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.

10-22-2001, 03:16 PM
I phoned my local dealer one time, and they said $800 to do both head gaskets. They must have given me the wrong info.

10-22-2001, 09:08 PM
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.