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Wiseco Piston = Ongoing piston slap?

7399 Views 33 Replies 14 Participants Last post by  HONDA GHANDI
My buddys k24/20 has 11.1 wiseco pistons. Occasionally one can expect some "piston slap" while the engine warms up, but even after 3 straight hours driving it still makes that sound. The sound is more or less like a 4 cyl diesel but quieter.

After chatting with the engine builder he thought it was odd. He contacted Wiseco and they said everythings o.k. and that was typical.....

Understand this is "second hand" knowledge, I know what the builder said but I wasnt in on the conversation with Wiseco.

The pistons have some kind of "coating" on them....teflon, perhaps.

Either way this sounds like crap to me :down: ...any thoughts guys?
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H2nr said:
I have run across two engines, both with Cometic HGs, that didnt have blown HGs (yet), and had a very slight knock. They were also both freash engines. When we pulled the heads the pistons were clipping and very thin strip of the GH. Since both blocks are 84mm we grabbed a factory B20 gasket and compared it to the Cometic. There were very noticeable differences. Lets just say I will never use a Cometic gasket in any more of my engines. Now this was on Bseries engines and not K series. Both engines are fine now with the factory HGs.
did you make sure that you got the correct cometic gasket not to mention that you used the b20vtec gasket and not the straight b20 gasket like most guys like to use. keep in mind that cometic specifically makes a lsvtec/b20vtec gasket for such purposes. dont justgrab the gasket that matches the bottom end. just because you can.
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