Started taking apart the bottom half

Cyl #7



Cyl #8



A sample of what all the pistons look like. One of the verticle scores can be felt with finger nail, but a check of all the liners there is no damage or scores.



Another example of a piston



Inside one of the liners. Cannot see any visible cross hatch, but very glazed. You can see very fine lines going vertical in the bore.

[Polo-1]

Just because you have beaches all the way around you, don't use the Z for hitting the sand dunes

Looks like she has ate some sand in the liner.

Originally Posted by Polo-1

Just because you have beaches all the way around you, don't use the Z for hitting the sand dunes

Looks like she has ate some sand in the liner.

Good one Kevin. Yes, as a matter of fact you may have something there. This Z came from Florida and I remember when I first got it and all the detailing I was doing under car and in the engine compartment surprised me with all the sand I was finding everywhere. Even in the frame there were chunks of sand like small rocks and some as large as 2 inches that I had to dig out. I promise you that I have not put offroad tires on and been bikini watching on Waikiki beach.

I decided to insert photos here after the fact that were missed:



I am a little disappointed by the crankshaft end play that should be .0006 to
.0010 and as you can see .0010 at the max.



I would have preferred to use the correct tool or a 3 jaw at a minimum but it was still easy to remove the gear even with this Craftsman 2 jaw.



Getting ready to remove the oil pump.



I forgot what this is called but very critical not to scratch, ding, etc. so it was carefully wrapped, ziplocked and labeled.



Oil pump removed and ready to remove the main cap bolts and lower case

[tomtom72]

Holy smokes. How many miles on the motor?

Okay, I have only assembled a few chevy sb motors from the stone age so being largely inexperienced I would be very thankful to learn from all you guys that have way more knowledge than I have.

My questions:

All the scoring on the skirts and I thought I saw some in the bores(?) was caused by foreign particles in the oiling system? Or in the intake air? Or both?

How do those foreign particles get in the motor? Running w/no air filter? How do they get into the oil?

What is the proper repair/correction procedure for all that?

Kevin, you were kidding about a ZR-1 being used as a dune buggy, right?

Sorry for the hi-jack Craig. Sorry for these stupid Q's.


Tom

[John Boothby]

Coming from Fla with "chunks" of sand in the frame rails sounds like possible flood damage. I have heard this about Fla cars.

[Polo-1]

Fun out on Daytona Beach

If the filter is not seated right or sand get knocked in when changing out the old...........

Sand gets sucked in. I see this all the time on the 2 stroke bikes when we would go to Oregon Coast for riding, back in the day. Not a big deal, but every scratch ( going from top to bottom ) is a little loss in compression.

Other thing I see is the top and second ring are getting hammered. Lots of pitting at the edges.

Craig did this car sit for a long period of time?

Tom,

53K miles. No problem and hopefully some good answers will come of your questions.

John,

If it was in a flood it is not evident anywhere else and surely did not get into the interior cabin and the rest of the underneath is pretty clean and appropriate for the mileage.

Kevin,

Yes, stored for when I got relocated and deployed in 2004 and when I returned in 2006 it was relocated to my current home where it was stored again from 2007 to 2009 while being restored for other things like interior, engine upgrades, etc. but ran strong and no indication of issues other than some smoking at WOT when it was last shut down to get to where it is now.

I can't wait to see what the mains look like when I can get to them over the weekend.



The con rod journals look okay, but these shots are not that good and have dust showing.

[IMG]http://i78.photobucket.com/albums/j86/hawaiizr1/DSC01499.jpg[IMG]



[IMG]http://i78.photobucket.com/albums/j86/hawaiizr1/DSC01502.jpg[IMG]

[tomtom72]

Thanks Kevin for taking the time to 'splain things! There are no places where I can be near or drive on sand.....maybe where Frank lives out on Long Island.

Thanks Craig for being so tolerant of me in your threads!

I'm thinking that Kevin's comment about the rings ( I didn't even "see" an issue there! ) could apply to my poor car. 7400 miles in 14.5 yrs is not exactly "frequent use"...and then I buy it and drive it alot!

For your entertainment, here is what the main bearings look like. Hopefully someone with experience can share some good points about the condiion of these. I am thinking about getting them coated and I heard about Calico and Polydyn. Not sure if these qualify or not and will have to send them in to be looked at. I am leaning more toward Polydyn at this point.



Main #1 lower



Main #2 lower



Main #3 lower



Main #4 lower



Main #5 lower