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May 19, 2007 19:45:09 GMT
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Yea, well aware of that btw - hence me saying along those lines, was just one of those things that might be oddball in a motor's components if you don't really know it's history  |
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v8ade
Part of things
Posts: 947
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May 19, 2007 20:00:58 GMT
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what should the gap be do you know? I think I will have to strip it back down again tommorow and try it You need to speak to Nightmares really.... What V8 is it ? What Pistons ? Piston manufacturers website should have ring gaps thinking about it  its a ford 351 windsor with forged trw pistons |
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Last Edit: May 19, 2007 20:42:29 GMT by v8ade
V8 on open headers at full throttle "Heaven"
Jaguar xf SportBrake
rover 820 Turbo vitesse
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May 19, 2007 23:04:57 GMT
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from memory should be 0.005" per inch of bore +0.001"
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v8ade
Part of things
Posts: 947
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May 20, 2007 10:44:41 GMT
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from memory should be 0.005" per inch of bore +0.001" got the pistons out ring gap is .65 mm i only have metric feelers which i think works out to 0.025" which i think is about right you still have to knock the pistons down the bores with a rubber hammer is this normal on a rebuilt engine ? the rings seem very stretched open nearly wider than the piston itself and they have to be squashed in quite a bit to get them in the bores is that normal ? can you tell i never mess with engine internals normally? |
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V8 on open headers at full throttle "Heaven"
Jaguar xf SportBrake
rover 820 Turbo vitesse
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May 20, 2007 22:25:57 GMT
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yes all normal 0.025 sounds about right for a 351  |
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v8ade
Part of things
Posts: 947
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took the engine back to pieces the crank spins freely and the big ends on the crank are free running to, its deffinatley the pistons in the bores that are holding it back it will know turn with a ratchet on the front pulley though so I'm going to get a high torque starter and give it a wizz and see what happens.thanks for all your help
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V8 on open headers at full throttle "Heaven"
Jaguar xf SportBrake
rover 820 Turbo vitesse
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remember that with forged pistons you should have a little more "slack" than with cast ones as they expand more when warmed up.
I'm concerned if the starter motor won't spin the assembly with the heads off!
Measure everything I think something's tight...
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1941 Wolseley Not Rod - 1956 Humber Hawk - 1957 Daimler Conquest - 1966 Buick LeSabre - 1968 Plymouth Sport Fury - 1968 Ford Galaxie - 1969 Ford Country Squire - 1969 Mercury Marquis - 1970 Morris Minor - 1970 Buick Skylark - 1970 Ford Galaxie - 1971 Ford Galaxie - 1976 Continental Mark IV - 1976 Ford Capri - 1994 Ford Fiesta
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