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View Full Version : Should i give her some new pistons?



pest619 - n/a
19-Feb-07, 02:35 PM
Was just wondering wether you think i should give the old hovercraft a rebore and new pistons since it has about 75psi on both pots- seems a bit tired even though she did start first pull since Jakes Place!. (it seems to be better to just buy whole piston kits for 25 rather than just rings for 15 which are the cheapest prices iv found).



Im going to have to do at least 5 races in it this yr to keep my license ticking over until the new crafts ready unless i can blag someone elses for a meeting... http://hovercraft.org.uk/images/icons/smiley_icons/icon_wink.gif



cheers

team black - n/a
19-Feb-07, 06:13 PM
75 psi is low for a TZR. If you're going to re-use the engine then well worth re-boring. As a budget alternative, check that the rings haven't got gummed up, which they can do with cheap 2T oil

tonybroad - n/a
19-Feb-07, 09:02 PM
look up the exhaust port and look for burning below the rings - excessive blackness below the rings is a sign of ring/bore wear



Tony