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> pulled the heads, looks like a bbq pit . . .
mcbain77
post Mar 4 2006, 10:56 AM
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So i pulled the cylinder heads off a 1970 1.7L engine and they look really pretty . . . (IMG:http://www.914world.com/bbs2/html/emoticons/icon8.gif)

This is my first Type IV to dismantle so does anyone have any suggestions? How does it look? I also took off the oil filler assembly and found 1/2" of rusted out gunk on the area below the breather assembly. How do i clean this out? Should I crack the case and just start from the beginning?


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mcbain77
post Mar 4 2006, 10:57 AM
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Area below the breather . . .





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Allan
post Mar 4 2006, 10:57 AM
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Doesn't look so bad.
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mcbain77
post Mar 4 2006, 10:59 AM
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The top of the pistons look just about as good. Any suggestions on removing the carbon?
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r_towle
post Mar 4 2006, 11:52 AM
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Easy off oven cleaner...works awesome.

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anthony
post Mar 4 2006, 11:54 AM
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Why did you take the heads off?
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mcbain77
post Mar 4 2006, 01:13 PM
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Fake answer = the rocker assembly has some nasty corrosion and there was crap all over the inside of the head. I also pressure washed the engine and wanted to make sure i got the thing dry.

Real answer = DWD (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)
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mcbain77
post Mar 4 2006, 01:16 PM
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What about the gunk in the area below the breather assembly? The oil filler corroded and there is a significant amount of deposit. I am betting there are deposits all throughout the crankcase because of this. Can this be flushed out?
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mcbain77
post Mar 4 2006, 01:29 PM
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Also . . . . broken fin

so new cylinder is needed right?


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Andyrew
post Mar 4 2006, 01:37 PM
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If the fin was a regular one.. I would say you could us it..

but that fin is needed to hold the cylander... Thats a toughie!!

Its only a 1.7, so you should be able to find a new cylander cheap..
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Allan
post Mar 4 2006, 01:39 PM
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You can run it with that fin broken. The head actually cinches the barrel down and doesn't come in contact with it.
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mcbain77
post Mar 4 2006, 01:40 PM
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Only a 1.7??????? I'll have you know that thing can crank out a mean 80HP at the wheels on a good day when the stars are aligned!

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fiid
post Mar 4 2006, 01:40 PM
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I had a fin like that on my 1.7 and was told to leave it - it's only a small peice missing the heat dissipation won't change much.

I think (contrary to what Andyrew said) that the fin isn't actually the mating surface so I think you'll be okay. IIRC my 1.7 had exactly the same thing.
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mcbain77
post Mar 4 2006, 01:49 PM
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I'll probably leave it then. If the engine blows then it is only a 1.7 anyway. (IMG:http://www.914world.com/bbs2/html/emoticons/laugh.gif)

As for the gunk below the oil breather, has anyone seen any corrosion like this? It is just sediment so I can clean it out the top. However, I was thinking that stuff like that floating around in the case is a recipe for disater. Even more so than a broken fin.

Can you flush a case? Maybe with consecutive oil changes after short running periods? Hmmm. (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)
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Allan
post Mar 4 2006, 01:53 PM
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QUOTE (mcbain77 @ Mar 4 2006, 11:49 AM)
Maybe with consecutive oil changes after short running periods? Hmmm. (IMG:http://www.914world.com/bbs2/html/emoticons/idea.gif)

That's what I would do.
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Joe Ricard
post Mar 4 2006, 04:06 PM
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My resolution isn't very good on this computer. Is that piston Domed or dished.
Domed is 80 HP early "W" case
Dished I don't think it makes enough power to pull it's self out of a wet paper bag. ON A GOOD DAY.
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mcbain77
post Mar 4 2006, 06:29 PM
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Dished. And now served.

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Bleyseng
post Mar 4 2006, 07:10 PM
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dished so you are in busland a whooping 67hp.....change them out to a set of domed 90mm's.
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Allan
post Mar 4 2006, 07:11 PM
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QUOTE (Bleyseng @ Mar 4 2006, 05:10 PM)
dished so you are in busland a whooping 67hp.....change them out to a set of domed 90mm's.

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McMark
post Mar 4 2006, 07:46 PM
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QUOTE (Andyrew @ Mar 4 2006, 11:37 AM)
but that fin is needed to hold the cylander...

The fins are only for cooling. The cylinder mates of the head at the cylinder wall only. In fact, if your fins are hitting the head, it can cause sealing problems.
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