Spun Bearings and New Internals

[9!'clipseDOHC]

So I dropped my engine off at Luna Performance yesterday to get diagnosed, and sure enough they found the problem. It had spun both balance shaft bearings, causing damage to the pistons, crankshaft journals, oil pump/front case, and lifters.

My shopping list just got a lot more expensive. I just added:
Wiseco Pistons (.20 over) (not sure 8.3:1 or 9:1 yet)
ACL Race main and rod bearings
APR main studs
3g lifters (sucks because even the old ones were 3g)

The thing that bums me out the most is the crankshaft though. I have a good one in my non-turbo 6 bolt, but I'm still driving it. If I pull it out then I'm out my car until I finish everything.

I have another spare 4G63 in Virginia but I can't remember if its a 6 or 7 bolt. My Dad's going to check tonight and let me know. If its a 6 bolt then I'll have that one shipped out here, problem solved. If not then I have to decide whether to buy another one or pull the engine out my car early. I also don't like option B because then I lose a fully functioning spare engine.

As far the oil pump/front case goes, no problem, I have a spare. Isn't it awesome when you have a spare part and you actually need it. That front case has been in a box in my garage for the last 5 years and I'm finally getting some use out of it. At least that feels good.

If anyone has an opinion on 8.3:1 or 9:1 Wisecos, Please let me know. I'll be searching the forums most of the night. Before I go, here are some pictures. They were taken with my cell so they aren't that great.

View attachment 1771
Completely disassembled at Luna Performance

View attachment 1772
One of the spun balance shaft bearings in the oil pan

 

[9!'clipseDOHC]

**Edit** My spare engine is a 7 bolt so its a no go on the crank. I'm still looking. Also I'm leaning towards the 8.3:1 pistons.

 

[trevor425]

that sucks dude!
glad i did the Balance shaft elimiation when i did my t belt last month! besides, it gave a great boost in oil pressure too!

 

[9!'clipseDOHC]

glad i did the Balance shaft elimiation when i did my t belt last month! besides, it gave a great boost in oil pressure!

If only I had. They are definitely not going back in. I'm more worried about the oil pressure being too high. Did you port the oil filter housing?

 

[trevor425]

nope, just rotated the bearings and used the oem mirage part for the oil pump. oil pressure is always around the middle of the gauge now. after the car is hot it never drops below 1/4 of the stock gauge. i wouldnt worry about it being to high.

 

[9!'clipseDOHC]

Everything is here!
Mitsubishi 6 bolt crankshaft
Wiseco .20 over 8.3:1 forged pistons
ACL Race main and rod bearings
ARP main and head studs and rod bolts
Gates Racing timing belt
Mitsubishi BSEK
Mitsubishi tensioners and pulleys
Mitsubishi water pump
Mitsubishi engine gasket kit
ITM 3g lifters

One big (and expensive) step closer!!!

 

[herms99gst]

hell yeah good luck on the buildman!!

 

[herms99gst]

dont forget to get your mains align bored for the studs!!!

 

[90gst_sean]

Go for the lower compression pistons for sure.

And I can say this because I am currently running 2g pistons/1g rods in a 1ga GSX.

Unless you have all the tuning toys (I have Link) and truly know what you're doing, it can be more headache than it's worth.

If you do choose to go that route, I'd suggest these upgrades:

DSMLink (important to be able to control timing)

Wideband O2 &/or EGT (wideband minimal)

Knock suppression (meth/water or larger IC... I run Meth/water)

Extra fuel to help control knock when needed (550's minimum - 600-700's recommended and supporting fuel pump if running an larger turbo)

--Good luck with you build brother!

 

[9!'clipseDOHC]

Go for the lower compression pistons for sure.

And I can say this because I am currently running 2g pistons/1g rods in a 1ga GSX.

Unless you have all the tuning toys (I have Link) and truly know what you're doing, it can be more headache than it's worth.

If you do choose to go that route, I'd suggest these upgrades:

DSMLink (important to be able to control timing)

Wideband O2 &/or EGT (wideband minimal)

Knock suppression (meth/water or larger IC... I run Meth/water)

Extra fuel to help control knock when needed (550's minimum - 600-700's recommended and supporting fuel pump if running an larger turbo)

--Good luck with you build brother!

Thanks! Yeah I already went with the 8.3:1 cr Wisecos. I have an AEM wideband and a Walbro 255 with a Buschur/SX AFPR. DSMlink and larger injectors are next on the list once I get it running. Thanks for the advice!

hell yeah good luck on the buildman!!

Thanks! As far getting the mains aligned, the internals are being assembled at a performance shop and they've built some monster DSMs so I know they know what they are doing. Thanks though!