Small hole in cylinder wall

[TwoOhSickness]

I pulled the head on my '96 tsi after an overheat.
Head gasket was intact, but head was warped, so I planned on getting it resurfaced.

However I noticed a small pencil eraser sized hole (doesn't go through, maybe a half cm deep) in one of the cylinder walls.

Is the block toast? Or is this a casting defect and not a possible result from an overheat?

Would this cause loss of compression?

Thank for any help.

 

[silver bullit]

Block is toast, which cylinder was this on?

Yes that would definitely cause a compression loss.

 

[laserspeeddemon]

Yes, that is very toast. You can not bore it even close to 1/2 cm.

 

[TwoOhSickness]

Alright thanks guys. I had a feeling it was fried but wanted to make sure. I don't think it's worth trying to do an engine swap, do you guys think it would be more profitable to part it out (i could probably resurface the head and sell it) or try and sell it all at once? It's pretty much just a parts car at this point anyway... right?

 

[DoyoFCT]

if the hole isnt all the way thru, it may run fine that way, i say slap it back together, if it ran before it should still run. for how long? i dunno... but you could slap it together until you found another motor? or re-sell the car (just pretend you didnt see it haha)

 

[xxraptor660xx]

I'd make an attempt to shave it and put it back together. If the car runs crappy, part it out.

 

[Rex2342]

Looks like it's time for a 6bolt swap. Don't even bother trying to salvage that block. Sell the pistons if they're ok and whatever else you can to get a few bucks.

 

[TwoOhSickness]

When you say shave it do you mean re-bore?
What if you put a new cylinder sleeve in, can those things come out or are they part of the block? If they are, could you put an extra sleeve and get an undersized piston for it?
Any way to jimmy weld it flush with wall?

It would be cool to get it running and sell the thing and buy another one that wasn't raced to sh*t.

 

[silver bullit]

YOU CANNOT SAVE THE BLOCK.

It would cost more to sleeve it, (still have hole in block and the cost to do this exceeds any used block or a rebuilt one.), try to weld it which you cannot, It cannot be bored out, there is a hole in it, it is done.

Its much cheaper to find another one and use it or rebuild it yourself.

 

[Defiant]

Good god. Motor mice. I thought those were extinct.

I can't even think of how this would have happened.

 

[laserspeeddemon]

if the hole isnt all the way thru, it may run fine that way, i say slap it back together, if it ran before it should still run. for how long? i dunno... but you could slap it together until you found another motor? or re-sell the car (just pretend you didnt see it haha)

I'd make an attempt to shave it and put it back together. If the car runs crappy, part it out.

Comments like these can get you negative rep points. Why would anyone try to reuse that? Spend hundreds, maybe thousands of dollars, just to find out the motor was never good from the get go. A full gasket kit costs around $300 alone. This doesn't make any sense.

The cheapest route is to swap in a used 7-bolt block. The smartest route is to have a used 7-bolt rebuilt and THEN drop it in. The best route 6-bolt conversion and my favorite, the extreme (and most expensive) route, build a 6-bolt, possibly stroked, for serious race duty.

I also have to comment, I think the 7-bolts are WAY underrated. Sure, a few of them have crank walked but those are getting fewer and farer between, I believe the number is like around 15-20% and diving. Don't get me wrong, I love my 90 6-bolt with its external air-to-air oil cooler, but if I had a 2g, I would keep the 7 bolt bottom end.