Wiseco piston help

porkchopvw · Posted: Wed Feb 01, 2012 8:02 pm Post subject: Wiseco piston help

Does anyone know how to tell which way the wiseco pistons point on a rebuild? From what I can see, there are no identifying marks like the usual arrow. Any help would be appreciated. Marty
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Chip · Posted: Thu Feb 02, 2012 11:37 am Post subject:

Mine has an arrow on the inside of the piston, on the wrist pin area, mine isn't your standard wiseco, but the same may apply to yours. give it look.

yamaducci · Posted: Thu Feb 02, 2012 11:51 am Post subject:

No arrows uless you stamp one on there yourself. The valve pocket reliefs on the underside just need to be up not down.
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My 2498 Turbo Re-Build Thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=5578697#5578697

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Chip · Posted: Thu Feb 02, 2012 12:13 pm Post subject:

Good advice there, didn't even think to look there.

porkchopvw · Posted: Thu Feb 02, 2012 2:27 pm Post subject:

Just talked to a tech from Wiseco and he told me the pistons are completely symmetrical with no offset. Good to know. A small stamp for next time is definitely a good idea though. Thanks.
_________________
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"You work hard, you save money, you buy some chrome, and just when you think you're getting ahead... BAM!, the cardboard blows off the window."
1600cc O-cheesy-wall desert cruiser
2443cc OG (not grafted) '54 3-fold semaphore ragtop
1641cc '64 sedan daily driver

*** Duncan Peters Motorsports ***

Eaallred · Posted: Thu Feb 02, 2012 4:03 pm Post subject:

Valve pockets should go toward the bottom, not the top. That is where the piston gets notched for clearance. If you're not notched, it really doesn't matter.
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SRP1 · Samba Member Joined: January 06, 2007 Posts: 4342

If the piston has a zero offset wrist pin bore it does not matter which way it faces as long as there are no valve reliefs. If it has reliefs then as Eric said they face downward.
If the wrist pin bore has an offset, the manufacturer will normally mark the installation direction.

yamaducci · Posted: Thu Feb 02, 2012 10:10 pm Post subject:

I re-thought about this and I was wrong. Pockets are down. Hey everyone makes mistakes as long as they are not during assembly ha ha.
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-John Cox
My 2498 Turbo Re-Build Thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=5578697#5578697

3rd Brake Light Safety Stars- I still have a couple with blue light left. Email me if interested.

Chip · Posted: Fri Feb 03, 2012 1:52 am Post subject:

Looks like mine was made wrong then...pocket reliefs should def be towards the top on mine. Unless it was numbered wrong. Eric, I may be giving you a call tomorrow...

Eaallred · Posted: Fri Feb 03, 2012 7:10 am Post subject:

Chip · Posted: Fri Feb 03, 2012 7:56 am Post subject:

Were yours numbered and marked for to point at flywheel? Not sure if the PO did it to mine. The one marked 4 is definitely upside down. Haven't checked any of the others though. May need to brave the cold and head out to the garage.

Eaallred · Posted: Fri Feb 03, 2012 8:25 am Post subject:

yamaducci · Posted: Fri Feb 03, 2012 9:08 am Post subject:

Chip · Posted: Fri Feb 03, 2012 9:35 am Post subject:

The back looks exactly like the ones you have on your build page. For the front, you'll have to contact John C. Not trying to be rude, but I'm trying to protect the interests of my friend. He hasn't published any, and I won't jump in and do it for him. Not my place. Sorry.

Eaallred · Posted: Fri Feb 03, 2012 9:43 am Post subject:

yamaducci · Posted: Fri Feb 03, 2012 12:05 pm Post subject:

I realized after I asked the question that it did sound like I wanted to see the Squishies but I didn't really mean that. I know John wants the design kept to the purchasing public. Hopefully he only sells them to Americans who don't travel to china.
I just wanted to see them mounted on yous short block for clarity.
_________________
-John Cox
My 2498 Turbo Re-Build Thread: http://www.thesamba.com/vw/forum/viewtopic.php?p=5578697#5578697

3rd Brake Light Safety Stars- I still have a couple with blue light left. Email me if interested.

Chip · Posted: Fri Feb 03, 2012 5:15 pm Post subject:

Cool cool, I actually don't have them mounted to the short block at this time. One is on my desk, the others are in the garage waiting in line patiently for their turn on the engine stand.

DarinNDebra1961VW · Posted: Sun Apr 08, 2012 7:53 am Post subject: Wiseco 94's

Recently I found myself caught in a quagmire in the middle of a 2276CC engine build. Then discovered that id bought the wrong cylinder and piston set. Needed 82x94 but had 69x94. and with Mahle being on national backorder. I moved in the direction of Wiseco. Which of course I was told could be used with my exisiting new Mahle Cylinders. Last night I was moving in the direction of setting ring gaps etc. I noticed that the wiseco pistons appear to be about a 16th of an inch smaller in diameter than the Mahles. I have not been able to accurately measure them yet.

this has me sweating bullets. Considering what to do? Autocraft cylinders? In my mind the wisecos should fit as snuggly in the cylinders as the mahle's did.

Share your thoughts
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modok · Posted: Sun Apr 08, 2012 12:08 pm Post subject:

It usually says what size hole the pistons fit on the box

And also, if the rings gaps are near correct then you have it right, unless the rings and pistons were mis-boxed, which is unlikely

If they don't give me a clearance spec I go by ring gaps and common sense

If you can't afford to have it looked at, you can use feeler gauges to check the skirt clearance. That is how they did it 50 years ago

yamaducci · Posted: Mon Apr 09, 2012 7:08 am Post subject: Re: Wiseco 94's


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