Crank preparations for rebuild?
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Crank preparations for rebuild?
I am rebuilding my b16. I am throwing in a new set of bearings for both the rods and crankshaft. Are there any preparations to the crank I should make? If the tolerances are out of spec is the correct proceedure to micropolish? I am skeptical of replacing the bearings with having uneven journals on the crank. I havent measured yet I am just wondering as I have never had a crank machined before.
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Re: Crank preparations for rebuild? (civickid03)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by civickid03 »</TD></TR><TR><TD CLASS="quote">Are there any preparations to the crank I should make? </TD></TR></TABLE>
Not really. Make sure the oil galleys aren't gunked up. A gun cleaning kit works well for cleaning them. Also make sure the oil seals didn't dig into the crank too deeply or you'll have pesky oil leaks.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">If the tolerances are out of spec </TD></TR></TABLE>
Nothing will be out of spec if the engine was healthy when you tore it down. If the journals were out of round, you would have known it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">is the correct proceedure to micropolish? </TD></TR></TABLE>
Micropolishing isn't even remotely necessary. You can do it if you want to enjoy the theoretical benefits it provides. I'll admit I bought into it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">I am skeptical of replacing the bearings with having uneven journals on the crank. I havent measured yet I am just wondering as I have never had a crank machined before. </TD></TR></TABLE>
You don't need it machined. You don't have to do anything to it. Like I said, the crank journals don't magically taper or go out of round. If you removed healthy, un-spun bearings, your crank is good and healthy.
Not really. Make sure the oil galleys aren't gunked up. A gun cleaning kit works well for cleaning them. Also make sure the oil seals didn't dig into the crank too deeply or you'll have pesky oil leaks.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">If the tolerances are out of spec </TD></TR></TABLE>
Nothing will be out of spec if the engine was healthy when you tore it down. If the journals were out of round, you would have known it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">is the correct proceedure to micropolish? </TD></TR></TABLE>
Micropolishing isn't even remotely necessary. You can do it if you want to enjoy the theoretical benefits it provides. I'll admit I bought into it.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote »</TD></TR><TR><TD CLASS="quote">I am skeptical of replacing the bearings with having uneven journals on the crank. I havent measured yet I am just wondering as I have never had a crank machined before. </TD></TR></TABLE>
You don't need it machined. You don't have to do anything to it. Like I said, the crank journals don't magically taper or go out of round. If you removed healthy, un-spun bearings, your crank is good and healthy.
* B A N N E D *
Joined: Apr 2007
Posts: 848
Likes: 0
From: SoCal, CA
Re: Crank preparations for rebuild? (civickid03)
Don't worry, I'm sure I'll get banned soon. Intelligence is highly frowned upon on this forum. I think the mods fear that the serfs will gain literacy and start an uprising.
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