Originally Posted by vr6jetta18
whats up guys. right now i have a vr6 that has a horrible compression problem. four of my cylinders are only putting out 80 psi. my mechanic told me to take it to a machine shop and they can do it for me. thats what i'm going to do and while i'm at it i was gonna bore it out to a 3.0. can anyone tell me the parts that i'll need and about how much its gonna cost me for parts and labor?
The most common punch is to a 2.9L. Actually there is very little difference between a big 2.9L a 3.0L, they both use the same drop in pistons. I would take the block to a reputable machine shop (preferably VR6 specific) like Schimmel Performance, APTuning or EIP Tuning because bore a VR block requires a specially made boring bar.
The block will run you around $800 in labor depending upon the condition it is in. The pistons, rings, clips will (this is for a forged set) will run between $700-$825 depending upon who you go with. Rods is really up to you whether you are going with a forged set, shot peened/stress relieved stock set or off the shelf stock set. This is all in accordance to what money you have to spend and what your future plans are for the car. The you have rod bolts, might as well have the crank spec'd, main bolts, head studs all in which I would recommended ARP. For a complete short block punched and using stock rods all completely assembled you are looking at between $2500-$3000. If you want to use a forged rod then add between $950-$1250 to that price.
It is a high priced tag but if treated well the motor will most likely outlast your tenure with it. Of course that isn't even touching the head, it really starts to add up. Might want to checkout http://www.spturbo.com/
for some nice prices on complete short blocks. Of course these are turbo short blocks but I am sure Bill would be more then happy to hook you up with a NA setup if you chose