goon9

iTrader: (13)

Looking at the pully side, I can see that the shaft is roughly wondering 1/8". So Isuppose my crankshaft is bent.

How much are they?

Is it worth chaning one on a motor with 200k miles?

Matt93SE

iTrader: (44)

Is it the pulley itself or the actual crank? I've found it's usually just the pulley that's got a bit of wobble in it.

but if the crank is actually bent, jsut buy a junkyard engine. it's cheaper than buying a new crank.

goon9

iTrader: (13)

I was looking at the center of the bolt. It has a wobble. I sorts doubt the bolt is bent.

bvtran

iTrader: (3)

The bolt probably got loosen from under torque. Get an impact wrench, loosen that nut and check.

Also, chances are your pulley was bad so give Unorthodox a call to see if they got a clearance UDP replacement, the ones with a slight paint chip. I got mine for $90 4 years ago.

goon9

iTrader: (13)

Are you sure it's not my ecu?

bvtran

iTrader: (3)

lol yup definitely ECU j/k

maxmaxima91

make sure its not the washer under the bolt.. that can have someplay in it.

Greeny

iTrader: (43)

Time for a trip to redneckville?

goon9

iTrader: (13)

Maybe... It will be a little time.

Matt93SE

iTrader: (44)

pull the bolt off and rotate the crank from the other end. see if it's the crank or the bolt.

all of my cars have had a slight wobble on that bolt for some reason or another.

goon9

iTrader: (13)

Interesting. When I redo my belts soon I'll check it. OR when I do get a new pulley.

Chris Gregg

iTrader: (59)

I would consider this approaching catostrophic failure. I'm surprised there are not some other signs that your crank is actually warped. Would there not be a noticeable oil leak? Premature wear of belts? Difficulty turning engine over and loss of power? I agree, make sure the crank pulley bolt is on tight. Worst case, you do need a crank, I have one in my garage.

goon9

iTrader: (13)

I never changed a crank... I need to pull the motor?

I donno if it's really worth changing, vs a fresh motor. I don't drive it alot, maybe a 100 miles a week and it's been like this since I got it 100,000 miles ago. Only 2 sets of belts, that never needed changing. Runs good, lil rough because it might need plugs.

Greeny

iTrader: (43)

Pretty much....

maxitech

iTrader: (7)

My question is: what would bend the crank shaft in the first place?

Greeny

iTrader: (43)

the vg crankshaft snout has "issues"

Weak design..

maxitech

iTrader: (7)

I noticed a slight wobble when I put my UDP on...Nothing to worry about tho, right, Matt?

Hectic

iTrader: (20)

even if it really is tweaked, i'd just drive it till it breaks off. you can upgrade to an et after the engine goes.. I've also noticed wobble in mine although it seemed more like an optical illusion from markings on the snout than it did an actual wobble. didn't the snout issue get fixed for the 91+ vgs anyhow?

goon9

iTrader: (13)

I read some where online that you can put in a turbo crank with some machining? The bonus is that they are forged. Anyone know?

Chris Gregg

iTrader: (59)

I wasn't aware that the VG and VGT cranks were different. Installing a used crank into another engine would benifit from machining to make sure you had the right clearances.

After some further thought, you would have to remove cross member, drop engine down and remove oil pan, pull all front pulleys and timing belt, and drop tranny to pull flywheel in order to swap crank. Yeah, that does sound like a pain! Never mind. Well, I've got a good running complete VG engine too if you do need one. But, I agree....if there are no other signs, drive it till it breaks, especially if that is all the miles you put on the car.

goon9

iTrader: (13)

found more info
http://mywebpages.comcast.net/engloi.../vg30tips.html
look at the crank section. I donno how much is legit like most things.

Matt93SE

iTrader: (44)

Funny... the VG crank is good for 1000hp.

the problem is people put their belts on too damn tight.

Greeny

iTrader: (43)

I think i have read a few past threads about the snout breaking off on the vg crank,not sure why they did,but you are probably right as usual...

Matt93SE

iTrader: (44)

the snout breaks because people overtighten their belts. as the crank turns, it flexes on it right there over and over and over. If you know much about metallurgy, you'll be able to see that it's a fatigue failure. (I don't myself, but I sent a broken one from a customer car to a friend that works in materials testing industry..)

Greeny

iTrader: (43)

Going out to check my belts...

jonmandude

iTrader: (1)

Everything that I have read says that VG30E and VG30ET use the same crank and, yes, it is forged. I have read that a VG bottom end can withstand 25+ pounds of boost and around 700hp.

I am with Matt on the stess fatigue/belt tightening idea. Most people just install new timing belts and accessory belts and crank down on them (bad idea). Always check correct tension and torque settings when doing any engine work. For timing belts use the correct feeler guage on the tensioner.