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Showing results for tags 'piano top pistons'.
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I have read through quite a few of the discussions on the benefits and concerns of the 121, e12, and e21 cylinder heads. There appears to be a major concern about using e21 cylinder heads with the oem piano top pistons. I just pulled the e12 cylinder head off my 1973 m10 engine because of cylinder head corrosion concerns. The head is now scrap because of all the aluminum corrosion in the water jackets. The pistons in this engine are of the piano top design set at 90 deg not the ones at ~45 deg. Purchased another 2002 engine as a spare a while back and just completed a 3 angle valve job on it. This head is an e21 2.0. What concerns me is all the written information that the valves will hit the pistons if I use this head. What is confusing is that the engine I pulled the e21 head from has piano top pistons and looks to have been built that way from day one but its hard to determine that for sure. There is definitely no contact with the pistons and the valves were true and concentric when I ran them through the valve grinder. I plan to double check anyway with clay to make sure no interference exits. Not sure if there is data to support the assumption that there is interference with this combination or just anecdotal based on a possible concern. Please advise if in fact you have had issue with this combination. Thanks in advance
Location: : Bozeman MT SOLD - PM me about any parts in the photo you're interested in. (Sorry the block and crankshaft just sold) I can send close-up photos if you want to see more detail. The Victor Reinz gasket is still new in package. I recall some of the parts are A/C specific and hard to find, but I couldn't find diagrams on RealOem to identify them. If you're in need them, you'll know better than I do. The 3 pistons are piano tops. Not sure of their condition, but they look good to my naked eye.