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Author Topic: Pistons wanted w187  (Read 1302 times)

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Offline bilgummi

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Pistons wanted w187
« on: October 01, 2011, 02:47:20 PM »
6 new or used pistons for 220 W187 wanted. Different sizes actual.
 

Offline KRK

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Re: Pistons wanted w187
« Reply #1 on: November 10, 2011, 07:58:29 AM »
Chief, I'm not sure how you've gone here, but I'm getting some oversize W187 pistons manufactured by JP Engineering in Adelaide, Australia. I've sent one of mine over to them and they are able to make me 6 at AUD$200 each, which is very reasonable. The only difference between the original and theirs is the gudgion pin won't be off centre, so they may be 'slightly niosier' than the genuine article. The link is: http://www.jp.com.au/JPPistons.html and the chap I have been talking to is Peter. I will be getting my set manufactured in the New Year, so if you get in touch with them my piston they have would be the 'template' for any you may wish to order.

Good luck

Richard
« Last Edit: November 11, 2011, 04:45:28 PM by Des »

Offline Henry Magno

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Re: Pistons wanted w187
« Reply #2 on: November 10, 2011, 10:26:10 AM »
While I have no knowledge about Richard's supplier in Australia i would say that not all aftermarket pistons are made equally. I have had trouble with pistons made by Egge in California, and others have agreed that their pistons are not made all that well. In my case, it appears that the ring grooves were too deep, that they didn't compensate for the larger diameter of the oversized piston. I had an oil consumption problem and had to do it over as a result. Details can count.

I am currently doing a 170 V engine for which we did have pistons made by a high performance piston company because the pistons for 73.5 bore early engines were not available. I forget who they are because my machinist is handling it. They are forged but that is hardly necessary, it's just what they do. The price was comparable to the Mahle which I would have used had they been available.

That said, the 220 engine is a lot higher revving engine that the 170 so I would try to stick with OE on this engine, rather than a "lower performance piston" made for slow revving antique cars. You can find, usually from Manfred Prinz at blueman636 on eBay sets of 220 pistons for reasonable prices. The only catch is that these are 24mm wrist pin pistons so you will need a set of rods from a late fifties, early sixties 220 (they have a number starting with 127). This is a more robust rod, so it's not a bad idea to use them.

If you use the OE pistons, you can stick with the very tight piston clearances Mercedes calls for and the engine should be quiet. Aftermarket pistons may have a different coefficient of expansion so that has to be considered.

If you are thinking of using used pistons, check carefully the ring groove clearance. It's been my experience that pistons that may measure out at the correct diameter still may have excessive ring groove clearance.

Offline mb170sb

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Re: Pistons wanted w187
« Reply #3 on: November 24, 2011, 10:42:51 AM »
6 new or used pistons for 220 W187 wanted. Different sizes actual.

Have you got hold of pistons?  There is a chap in the Lake district selling new ones at fair prices, think I have a set used ones kikking about.

Please revert to mb230sl@lyse.net if you are still looking