wrd1972

iTrader: (12)

Got some scratches in nearly ever cylinder, some are more numerous than others. The scratches are around an inch or two in length and appear to be in the same uniform places on all cylinders.

Block has 78K on the clock and does not burn oil and ran cery strong before tear down, reason for tear down is worn camshaft bearings.

Attached below is a photo of the worst scratches, they can be felt with the tip of the finger. I would guess that the scratches are around .002" - .004" tops.


I really dont know much about honing, what is it capable of fixing? The cylinders are by and large good and does not shown any wear at the tops nor anything else but these scratches. Can honing fix this?

Formula350

iTrader: (3)

I haven't torn a motor apart in awhile, but that kinda looks normal.

Jditlfm

iTrader: (26)

i would take it to a mechine shop and get it blueprinted. Thats the best way to do it unless you have mic's and t gauges and know how to use them. they will tell you how bad the wear is and what kind of machining is needed.

gixxer92

iTrader: (2)

If you don't want to worry about things later clean it up good now while it's out, it may save you money later.
If there aren't deep scratches (have a machine shop give you a recommendation) honing and re-ringing with fresh bearings will get you another 70K easily thought just to contradict my top statement.

GOaT Cheese

That is completely normal wear.

wrd1972

iTrader: (12)

Okay if this is very normal wear what would you guys suggest I do, reuses as is with all new bearings or hone it? What is involved in honing and what is a fair price. Can I do this myself?

Formula350

iTrader: (3)

If you dont hone it I'll drive over and slap you Honing is a peice of cake. Go get a dingleberry hone (tall looking one with a bunch of round stones on wires), I think they're $25-30. Don't get the flat stone one. Just get an electric drill (corded, not battery) and go up and down the cylinders a few times untill you can see nice hatch marks. I'm sure there's a tutorial somewhere on the net to help you. If you have the money, you might as well bore it .030 or .040. Get some forged pistons.

freshlt1z28

iTrader: (2)

it looks like you are going to need to seriously ridge ream them. That ridge at the top of the cylinders looks fairly thick. But that doesnt make a difference if you are going to bore it.

GOaT Cheese

That is just carbon. Not an actual cylinder ridge.

wrd1972

iTrader: (12)

That is carbon ridge on the cylider tops, already check with a razor blade to make sure. What would you guys do with those scratches on the walls?

1. use as-is
2. Hone and ring
3. Bore to 355

Right now money has turned tight.

GOaT Cheese

If money is tight then do what Formula350 said, go to autozone and get a ball hone (glaze breaker), run it through the cylinders a few times and throw it back together.