Thick wall 88's Too Thick

[satterley_sr]

Just built a 1679cc for a customer using the aa 88 mm thick wall cylinders.

What a PITA. There was interference between the fins on adjacent cylinders. Installed one cylinder and then could not install the other because it hit the fins on the other cylinder. Grind/try/grind/try, after four times it finally fit.
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DDC racing

[LivinInnaVWBus]

Interesting. I've used a few sets of these and the only issue I had was the last cooling fin closest to the case hit one of the center case mating nuts. No big deal and an easy fix with a grinder. Assembling another engine with thick wall 88s as soon as the parts get back from balancing.

[surflvr911sc]

Were these the AA thick wall slip-ins w/ machined heads?
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Ryan Williams
'64 VW Sportsmobile "lil' Blue"
TEAM WILLIAMS

[gt1953]

Wonder if they are number 1 2 3 4.
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72 type 1
72 Squareback
({59 Euro bug, 62, 63, 67, 68, 69, 73 type ones 68 & 69 type two, 68 Ghia all sold})

[esde]

Is it possible that the case bores were set too close together when they were done?

[58Dub]

so does the head fit?
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58 Beetle (now just a pile of parts in the corner)
60 Beetle (2221 turbo under construction)
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[satterley_sr]

Yes these are AA machine in 88's,

If the bores are too close together, then VW did it cause you don't machine them.

yes heads fit engine is together after I ground down one side of the cylinder.
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DDC racing

[Brian Mathe]

If these are machine in 88's don't you have to "machine" the case to get them in?
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59 Kombi
66 Porsche 912
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[[email protected]]

This is just part of checking, and fixing, "stuff" that comes up during an engine build.
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[satterley_sr]

http://www.aapistons.com/collections/vw-piston-lin...-90-5-head
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DDC racing

[58Dub]

[bugguy1967]

Hmm... I guess it was just extra casting flash. I doubt you did serious mocking up and measuring, or you'd have even bigger complaints about how aftermarket stuff sucks and doesn't fit.

At least you will know for next time to check barrels in the case registers. I check for a different reason. One time, one of the steps inside wasn't cut to the right dimension, and my barrel wouldn't drop all the way down. That held up my estimated build time for my client at the time.
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"A petrol engine can start readily, run smoothly and give every appearance of being in good order, without necessarily being in good tune." - Colin Campbell, "The Sportscar Engine"

[satterley_sr]

There was not extra casting flash, just letting others know of the situation. I have built probably over 100 engines and not run into his before but this is the first time with the machine in 88's. I think this is something that AA should correct since it is a stock case!
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DDC racing

[LivinInnaVWBus]

[Brian_e]

My last two sets did the same thing. 2 minutes each on the bench grinder and they are perfect. No big deal at all.

The TW92's and the 94's always hit the 19mm case nuts also. Another 2 min. each on the bench grinder.

Brian

[[email protected]]

[Bill Dykes]

I have the same problem. AA thick wall 88s. Never had this happen before. Getting out the grinder tomorrow.

[LivinInnaVWBus]

[VWCOOL]

It's not rocket surgery

[64delux]