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Salvageable???


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Guest Anonymous

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URL: http://www.zeebuck.com/02bc/index.htm

Hi all,

I decided to tear into the core engine that I've had sitting on my engine stand for the past couple months. Well, this engine had a blown headgasket, and was sitting, full of coolant for a couple years. When I took the head off, well, you can see what I found! I took a rag, some brake clean, and some liquid wrench, and most of it cleaned up really well. I'm concerned about the rest of the rust though. Will it cost me piles more to have a machine shop rebuild this head, than if I went and bought a cleaner head, or does it really make a difference? I'm not too concerned about the block, as it will be receiving new pistons, and an overbore anyway. On that note, the pistons in there now are marked 89.06. I don't see that size in the FAQ piston chart, whats the deal? This motor is a 74, with an e12 head, BTW.

AlDSCF0002.JPG

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Guest Anonymous

web thickness between #1 and water passage

looks very suspicious. it needs to be able to be flat

and the same thickness as the rest, it looks

corroded. I would take a file and take a couple

thousands off, check with a .002 shim and straight

edge to maintain flatness across.

Michael

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Guest Anonymous

it's all in the pits man, finish stripping it down and get out a measure to see if your still within rebuild specs and even if your not, get out your port and polish kit (www.summitracing.com or wherever) and start practicing... whatever you do, don't throw it away, it's a learing exp. waiting to happen... : )

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Guest Anonymous

I've seen worse examples come out nicely with a fair amount of cleaning and a bit of resurfacing. I'll find out how well it performs with .020 off of mine :)

If not I've got a spare head sitting around... It looks somewhat decent. Don't ever toss a good piece of aluminum away! Try your hand at cleaning up the bowls, and if you screw up.. you'll still get a bit back from the aluminum recycler ;)

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Guest Anonymous

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URL: http://www.zeebuck.com/02bc/index.htm

Little update on the motor. I got it apart today, and it cleaned up fairly well. The head is still a little ugly, but far nicer than the above pics. The pistons had grown quite fond of their respective cylinders, and didn't want to be evicted. My friend hardwood, and his buddy 3lb BFH gave them some "persuasion", and they finally left! The cylinders could certainly use a hone at a minimum, but I'm thinking an overbore, and a little more compression are in order! Stay tuned!

Al

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Guest Anonymous

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URL: http://www.zeebuck.com/02bc/index.htm

I took a closer look at it today, and it seems OK. I think it's the pics that make it appear corroded. Either way, I'm still unsure if I want to use this head or not. The rocker shafts have some rust, as do the rocker springs, and even the cam. Its very light, but still...if I could get a better core head cheap enough, I'll probably use it instead. Decisions decisions.....

Al

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Guest Anonymous

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URL: http://www.zeebuck.com/02bc/index.htm

Thats what I was thinking, Mike. I've seen worse, and this one already cleaned up a bit, just with some brake clean, liquid wrench, and rag. My concern now is the bits of rust on the rocker shafts, springs, and cam. I might take you up on that other head.

Al

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Guest Anonymous

is at the machine shop, have them 'hot tank' it also. That will take all tha corrosion and crap out of the water passages. Get new freeze plugs put in too.

Cheers!

John N

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Guest Anonymous

Perhaps time to go with a regrind and some spiffy looking rockers? ;) How do the valves look? Perhaps go a bit bigger? Or just have them faced and back cut like I did. I should post some pics...

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