L28 from 82 ZX teardown

[siteunseen]

But a set of brass core plugs and give them to the machinest. I used Sealed Power I think?

This will keep you awake tonight...

cylinder piston ring types have different honing/hatching recommendations. I bought chrome faced molly and it's different than steel. Something else to research. It never ends when you get bit by the Z.

[Zed Head]

There are fairly simple things that people do for minor improvements.  Paint the inside of the block with glyptal to seal it and any casting sand that might still be there, and for quicker oil drainback (after you have it hot-tanked).  Clean up the coolant passages of casting flash with a grinder (before you have it hot-tanked).  Apparently there can be quite a bit.  Smooth the crankshaft weights so they don't hang on to oil.  Balance things, generally.  The "How to Modify" book is worth a look for ideas.

Since you have time.

[Av8ferg]

Thanks ZH. I have the book and will do some of those things but not go crazy. These engines run pretty darn good stock. So far the engine is in good shape, probably would have gone a many more miles than I’d ever drive it. All the carbon will be nice to clean up as I’m told they can become relative hot spots and start degrading performance.
I plan to send the block, crank and head next week.


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[Av8ferg]

Okay, pulling crank now. I decided to label with a paint pen after wiping the areas with denatured alcohol. My kids have a habit on moving crap in my garage. They’d be sure to mix them up while I’m on a work trip.





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[madkaw]

Some folks just use a starter punch and put dots on the caps . It doesn’t take much to mark them so you don’t have to wack them hard or anything . They won’t wash away either 

[madkaw]

I just pulled the same engine apart that had been sitting in someone’s garage for over 10 years on a stand . I was pleased to see these cylinder walls

[Av8ferg]

Almost got all the freeze plugs out, except the front and back ones. They don’t want to move.
There appears to be a bunch of rust in the engine behind all the plugs I pulled. Behind the coolant drain plug is was packed full of debris.
This block needs a nice hot tank to clean all this up.
Probably need the shop to remove front and rear drain plugs.




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[Zed Head]

34 minutes ago, Av8ferg said:

Almost got all the freeze plugs out,

Core.

https://en.wikipedia.org/wiki/Core_plug

[siteunseen]

They do serve as a high pressure "path of less resistance".

I've read on here where someone romped on their Z before the thermostat opened and one blew out. I've seen one that was pushed out of a water filled frozen block on an old pickup of my Dad's.

They're the duct tape of the liquid cooled motor. Started out as one thing but ended up useful as others.

[siteunseen]

I ruined an f54 trying to get that rear plug out. Drilled a small hole in it to thread a screw in to pull on with some vise grips. It's so close to #6 I drilled through the soft plug and before I could stop I'd drilled all the way into the bore. Stupid, stupid, stupid or maybe 1beer, 2 beers, 10 beers?

[Av8ferg]

I ruined an f54 trying to get that rear plug out. Drilled a small hole in it to thread a screw in to pull on with some vise grips. It's so close to #6 I drilled through the soft plug and before I could stop I'd drilled all the way into the bore. Stupid, stupid, stupid or maybe 1beer, 2 beers, 10 beers?

I can see that happening without beers. I drilled a hole to put in a small bolt, screwed the self tapping bolt in with my drill and almost hit the bore. Whew....had to flash a light in there to verify I didn’t hit it.

That plug is in there good. I need to have a professional remove it. I tore it up good trying.

 

 

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[Mark Maras]

 Looking at its current state, in my mind, it's begging for a hook of some sort, attached to my slide hammer with a lot of heat around the edges. Beer is optional.