Took engine apart, Now need advice

[johnboy1065]

hey ya'll,

I recently bought a 1g talon awd turbo that had a blown headgasket

well, when I took the head off I found out it had some heat marks on number 3 and 4 cylinders where the headgasket was blown

Sooo, out came the engine

I originally planned on boring it out and honing it and using my 1g big rods with a 2g piston but then cam ANOTHER problem

One of the corners of the block had at one time broken off and been Mig welded back on.

I don't really want to put money in a block that I would have to worry about breaking all the time.

Do you think it would be fine for me to replace ALL the bearings in the current engine. Do a very mild Hone. and then put the same pistons and pistons rings back into the car? what about the stock connecting rod bolts? I've heard you cannot retorque the stock ones.

I plan on purchasing a spare block a friend of mine has that is in perfect condition. I just don't want to build this particular block, but I need the car running

let me know what you think,

thanks,
John

 

[johnboy1065]

BTW I already have the full rotating assembly out of the block. Just trying to decide what to do...(wish I had never taken it out )

 

[cheap90gsx]

I just did the same. It runs but I've only put 55 miles on it so far.

 

[jdodds]

grab another block, replace all the bearings, maybe get the crank micropolished when you take the 1g rods to the machine shop to get them fitted to the 2g pistons and youll be good.

 

[jdodds]

in my area a good block goes for about 20-40 bucks so its a pretty wise investment if you dont trust your current block.

 

[johnboy1065]

I just did the same. It runs but I've only put 55 miles on it so far.

have you checked your compression yet?

if so, what were your numbers?

did you get new piston rings?

 

[johnboy1065]

in my area a good block goes for about 20-40 bucks so its a pretty wise investment if you dont trust your current block.

a 6 bolt block is hard to come by where I'm from

 

[91 TSi GP]

i definatly wouldnt reuse the piston rings. At minimum inspect the crank fro any grooves or anything if it looks alright get it micropolished.. get new rod and main bearings.. get new piston rings!.. and for what its worth try to find a cheap block and clean it up get it honed and resurfaced. That way you dont have anything to worry about

 

[johnboy1065]

So the verdict is....

At the VERY least I should:

1. Get new main bearings (including thrust bearing).
2. Get new rod bearings
3. get new piston rings.
4. Get the crank micropolished...BTW there are no visible marks on the crank and no grooves that will catch my fingernail, should I still get it micropolished?
5. Hone the cylinders.


and thats it, correct?

 

[johnboy1065]

any opinions are welcome! especially with experienced engine builders!

thanks,
John

 

[PawlGST]

piston rings are pretty cheap to replace, you should never put old rings back in.. you usually wont be able to tell if they are bad with the naked eye anyways. goodluck with your rebuild

 

[johnboy1065]

took the crank to the machine shop today and they said the crank needed to be turned so oversized bearings will be ordered

 

[91 TSi GP]

oo man turning the crank is expensive! it was 40$ to polish mine and like $159 to turn it..

 

[johnboy1065]

yeah, but I guess I have to do it...I don't really want to slack on the essentials. even though I'm not wanting to do a lot with this block I do want it to run for a while.