1973 914 2.0 Pistons, Domed or inverted dome? |
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1973 914 2.0 Pistons, Domed or inverted dome? |
szcesuil |
Jan 28 2018, 06:49 PM
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#1
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Newbie Group: Members Posts: 6 Joined: 19-June 17 From: Bolton, MA Member No.: 21,197 Region Association: North East States |
My father-in-law is rebuilding the engine on a 1973 2.0. The repair manual mentions that the pistons should be domed. However, the actual pistons have more of a dwell at the top. If the pistons and crank shaft were replaced at some point, we aren't sure what would be the best way to move forward. Should we use the same type of pistons that are in there or go back to what the factory originally used? If we revert back to the factory domed pistons, would we also need to replace the crank shaft?
Thanks, Paul |
TheCabinetmaker |
Jan 29 2018, 07:56 AM
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#2
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I drive my car everyday Group: Members Posts: 8,301 Joined: 8-May 03 From: Tulsa, Ok. Member No.: 666 |
I've dismantled engines of all sizes. Only once have I encountered domed pistons, and they were not stock. Between the 914S on your other thread, and domed pistons, you have a lot of misinformation. What repair manual said that?
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szcesuil |
Jan 29 2018, 11:41 AM
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#3
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Newbie Group: Members Posts: 6 Joined: 19-June 17 From: Bolton, MA Member No.: 21,197 Region Association: North East States |
I've dismantled engines of all sizes. Only once have I encountered domed pistons, and they were not stock. Between the 914S on your other thread, and domed pistons, you have a lot of misinformation. What repair manual said that? He was using the Haynes Owner's Workshop Manual, Porsche 914, 4 cylinder 1969-1976. Page 11 says light alloy with steel inserts, domed crowns for fuel injection, flat crowns for carburetors. Mine is a 2.0 with fuel injection. |
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