piston install
Printed From: CorrectCraftFan.com
Category: Repairs and Maintenance
Forum Name: Engine Repair
Forum Discription: Engine problems and solutions
URL: http://www.CorrectCraftFan.com/forum/forum_posts.asp?TID=5049
Printed Date: November-27-2024 at 1:39pm
Topic: piston install
Posted By: bwooton
Subject: piston install
Date Posted: October-23-2006 at 5:31pm
Hey guys i need a little help. i am building a 350 for my 79 tique and when i instll the pistons something just does not seem rite. It is harder than it should be to rotate the crank. "i know how hard it should be"
i have found the source of the problem to be the oil scraper rings. If i take them off and put the piston in with just the other rings it is fine. I know the scraper rings should add some resistance but not as much as they are.
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Thanks Bobby
there's no replacement for displacement
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Replies:
Posted By: 79nautique
Date Posted: October-23-2006 at 6:38pm
do you have the piston 180 off ? are you building a rev rotation engine?
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http://www.correctcraftfan.com/diaries/details.asp?ID=756&sort=&pagenum=1&yrstart=1979&yrend=1979 - 79 nautique
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Posted By: 64 Skier
Date Posted: October-24-2006 at 3:39am
What is your piston to cylinder wall clearance?
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64 Skier
66" HO VTX and 67" HO Triumph
http://www.correctcraftfan.com/diaries/details.asp?ID=1071&sort=&pagenum=3&yrstart=1971&yrend=1975 - 71CC
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Posted By: 05 210
Date Posted: October-24-2006 at 8:02am
Check the end gap of the oil rings in the cylinder,maybe they are the wrong ones.
Mike
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http:/diaries/details.asp?ID=2219" rel="nofollow - Air Nautique 210 Team
640 hours, not 1 regret
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Posted By: bwooton
Date Posted: October-24-2006 at 2:47pm
All the gaps are correct. I made special effort to check each one.
the pistons are going back in just as they were removed. Same bore same direction.
I will have to double check that piston to cylinder spec, but i am sure that it was within tollerance.
I think my compressor may have something to do with it. It is the cheap type with two bands that you just tighten down. it does not seem to sit correctly over the bore. i am going to buy a different compressor and see if that does it.
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Thanks Bobby
there's no replacement for displacement
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Posted By: eric lavine
Date Posted: October-27-2006 at 9:17am
bwooton, got a hydraulic roller cam with 50 hours on it, will sell very cheap eric, came from a 280 5.7 eric
just thought you might be interested
i have the lifters and the broomstick
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"the things you own will start to own you"
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