Advice please

[cantgo2fast]

I did an engine rebuild in school too, I would feel confident about doing one again, especially with as much resources at my disposal, forums, books, videos etc. Im rebuilding the engine for the CSU race team and ive definitely never done an R6 motor before. Triple check everything for sure, even if it takes you triple the amount of time. Remember every single build after this will take you less and less time and you will get more and more educated. I dont know if the 420a motor has balance shafts but I would ditch those too while you have the engine out. Good luck!

[boostjunkie333]

Thanks, does anyone know about that? Do we have balance shafts?

[david-b]

420a does not have balance shafts, so no worries on that.

My first rebuilt motor was my 420a too. It's a little intimidating but as long as you read and research, it's all good. Mine only has ~200 miles on it so far, but the thing is beastly.

Machine shops cost for me was block ~$420 (bore, polish crank, decked, hole filled) and head was about $650, but that included a valve job, deck, and porting and polishing plus intake manifold port/polish. If you spend more than that on machine work, you're getting ripped off haha.

As Silvr said, replace all the timing components. I would personally use an OEM TOB. Both aftermarket clutched/TOBs I've had in the car make a rattle when they're cold. The aftermarket ones are metal and they vibrate. They don't supply any more hold that the OEM does, so no need for it. Nearly all clutch packages I've seen comes with a TOB, but I would still go to teh dealer and get OEM. Next time I pull the motor/trans, switching mine out.

[cantgo2fast]

Maybe thats whats making that damn noise!

back on topic

[boostjunkie333]

Dave, do I need to take the trans out to replace the TOB? or can it be done with the trans sitting there still in the car with the motor out?

As for the machine shop, at the least what do I need to do? And also, I can bore. 0.020 over without having to change my current piston setup correct?

[david-b]

Trans can stay in. The TOB sits on the input shaft up against the pressure plate. When you take the motor out, you'll see the TOB on the clutch fork just chillin there.

Assuming that your current pistons are standard bore, .020 bore will need new pistons.

[boostjunkie333]

Thank you. I take it advance doesn't carry oem TOB's do they?

[vanilla gorilla]

OEM "syle" But not OEM brand. Go to chrysler.

[boostjunkie333]

Will do. I ran into some confusion trying to purchase all the timing components I will need to replace at advance, Couldnt figure out what I would need and wouldnt need. Can someone fill me in on the complete list?

I got the complete gasket set, and the water pump. Have to go somehwere else for the oil pump.

Now I need a timing belt...and what else exactly?

I didn't realize this stuff would cost an arm and a leg...guess im not gonna splurge on a big brake kit...

[david-b]

Timing is a very important component. You don't go with cheap parts on that.

-Timing Belt
-Water Pump
-Oil Pump
-2 Tensoner pulleys
-1 Tensoner

[boostjunkie333]

Got it. Thanks