Cylinder Walls

[DSMfânâtic]

I recently bought a used 6 bolt block:

On my new block, there are gouges on the cylinder walls of 4 & 3 (I think, the 2 closest to the timing belt??) 4 isn't too bad, but in cylinder 3 you can feel them. They go straight up and down. The engine is already .020 over, and i'm starting to run low on finances for this. My options are:

1) Assemble it as-is
2) Get it bored, and buy new pistons ($$$)
3) Fix the 7 bolt

Give me some opinions.

Thanks

 

[NinjaTech]

No! Do not assemble it with those gouges.. The rings will never seal and it will burn oil.

At a minimum it needs a sligh overbore and rehone, with pistons to match.

Pat

 

[d_money1]

well...i would say, just overbore to the next size piston...but as u said, low finances...so i understand why that's really what u didn't wanna hear. But i would have to say your best option probably. Maybe shop around for a little while, see if u can't find a good deal on some .040 pistons. Good luck.
Neil

 

[boostedinaz]

You could also try and find a block that hasnt been over bored and just have them take that .020 to match your curretn pistons. Either way you shouldnt leave these walls like they are.

 

[defrag010]

Boring is only around 20$ a hole, I think. That won't be too much added onto the machinework $$. What kind of build are you doing on the motor?
I have seen .040" overbore stock 6 bolt pistons being sold on ebay for 55$ new.

It might sound bad, but if there's one thing I learned in building up my dsm, it's do it right the first time and spend however much $$ is needed. I am in the process of tearing apart my motor because I didn't put ARP rod bolts when I built it.

 

[nickrule99]

If I were you, I'd find another block and get that bored out, unless you can return your pistons and get .030's.

If you cant afford it now, then dont do it. You'll regret it if you throw all this money into an engine and your rings dont seal right becasue of those gouges.

Your going to need to get a block bored out either way, so you need to either a) bore this bock out to .030 and get new pistons, or b) find a new block and have that bored for your current pistons.

Cheapest route would be to sell the block you have now, find another one somewhere, and have that bored .020 for your current setup.

 

[DSMfânâtic]

The current setup isn't anything special. The pistons are .020 ITM on 1g rods. I talked to the machine shop today, and he mentioned sleeving that cylinder. I've been searching, and keep reading "4g63 engines are iron and don't need sleeves"

He said it would be about the same price to sleeve the one cylinder as to bore the block to .040. The only advantage to sleeving it is that I can keep my current pistons (fairly new, but cheap) If I overbore, I'm thinking of going with some .040 Wiseco's from summit. But, that's almost $400 in just parts.

Opinions?

 

[boostedinaz]

This is why you drop off the short block BEFORE you buy any parts. There are a few RIGHT ways to do it, if you do those you will be fine. If you go other ways it may cost you well over 400.00 that you are worried about now.

Get a new block or go .040 over and get new pistons. Those are the only acceptable solutions in my eyes, but in the end it is your car.