Checking clearances
#205767
01/27/09 12:15 PM
01/27/09 12:15 PM
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Joined: Mar 2007
Posts: 12,008 Finally a HUSKER again
Moparnut426
OP
I Live Here
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OP
I Live Here
Joined: Mar 2007
Posts: 12,008
Finally a HUSKER again
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I might have asked this before, but how accurate is plastiguage? I got my stroker kit from Dan at performance machine, and I have started making sure everything is ok before assy. I have my crank and rods on my living room floor, and Im checking each rod and Im at 2 thousands on the rods with light oil, and green plastiguage. Do I have to use a different rod on every journal also, or can I use the same one. They are Childs track master rods and are a pain to get apart to check them. Should I put them together with the bearings in and use a snap guage, and a mike?
Or am I ok. Dan said 2-2.5 , and 2.5 is ideal. Also what is the green thick gunk on the rod bolts and should I clean it all off, and use oil.
Thanks,
Hope this isnt a dumb azz question.
Kasey
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Re: Checking clearances
[Re: Moparnut426]
#205768
01/27/09 12:21 PM
01/27/09 12:21 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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imo plastigage is not nearly as accurate as it used to be. in the olden days it was much more substantial, and actually felt like plastic. we would verify the plastgage reading with mic and dial bore gauge, and it was always spot on. now, it's waxy, and i've gotten some wildly inaccurate readings, so i don't use it anymore. imho, mic and dial bore gauge are the only way to go!
for what is the good life if not doing things thoughtfully?
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Re: Checking clearances
[Re: Moparnut426]
#205770
01/27/09 01:26 PM
01/27/09 01:26 PM
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Joined: Feb 2007
Posts: 5,080 organ
maximum entropy
master
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master
Joined: Feb 2007
Posts: 5,080
organ
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i recommend a dial bore gauge over snap gauges, as they are generally more accurate. good snap gauges are as expensive as some bore gauges, although top o' the line bore gauges are REALLY expensive!
for what is the good life if not doing things thoughtfully?
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Re: Checking clearances
[Re: Moparnut426]
#205772
01/27/09 03:14 PM
01/27/09 03:14 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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Quote:
I might have asked this before, but how accurate is plastiguage? I got my stroker kit from Dan at performance machine, and I have started making sure everything is ok before assy. I have my crank and rods on my living room floor, and Im checking each rod and Im at 2 thousands on the rods with light oil, and green plastiguage. Do I have to use a different rod on every journal also, or can I use the same one. They are Childs track master rods and are a pain to get apart to check them. Should I put them together with the bearings in and use a snap guage, and a mike?
Or am I ok. Dan said 2-2.5 , and 2.5 is ideal. Also what is the green thick gunk on the rod bolts and should I clean it all off, and use oil.
Thanks,
Hope this isnt a dumb azz question.
Kasey
plastigage is supposed to be used only on clean, dry surfaces. no oil. also, you need to keep the rods from twisting when you torque the bolts to get any accurate readings. i don't use plastigage. a mic and bore gage is much more accurate. snap gages are not accurate enough IMO to check that type of clearance.
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Re: Checking clearances
#205774
01/27/09 03:50 PM
01/27/09 03:50 PM
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Joined: Jan 2004
Posts: 27,347 Today? Who Knows?
1_WILD_RT
Management Trainee
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Management Trainee
Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
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Quote:
plastigage is supposed to be used only on clean, dry surfaces. no oil. also, you need to keep the rods from twisting when you torque the bolts to get any accurate readings. i don't use plastigage. a mic and bore gage is much more accurate. snap gages are not accurate enough IMO to check that type of clearance.
You'll get readings pretty easy on the mains, but to get close on the rods you need both rods on the journal before you try applying any torque & you should use a feeler gauge to take up the clearance between the rods...
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