spun bearing? Question why?
Thread Starter
Member
Joined: May 2001
Posts: 8,201
Likes: 1
From: Notgrapebutgreat, S.C./N.C., USof A
spun bearing? Question why?
I hear people " posts" talking about Honda's and how they spun rod bearings all the time, Question? Why does this seem to be such a big problem, what cause the bearing falure? Symtoms? ex.
Just thought i would ask a stupid question to find out H-T's response.....Thanks
Just thought i would ask a stupid question to find out H-T's response.....Thanks
Honda-Tech Member
Joined: Dec 2001
Posts: 18,151
Likes: 2
From: Hollywood Babylon
Re: spun bearing? Question why? (Hooch'n)
on a stock motor (never been opened) I would say lack of oil
on a build motor, probably incorrect bearing measurements
<< who has spun a bearing and it wasnt pretty
on a build motor, probably incorrect bearing measurements
<< who has spun a bearing and it wasnt pretty
Honda-Tech Member
Joined: Oct 2001
Posts: 3,310
Likes: 5
From: ILM, NC
Re: spun bearing? Question why? (Hooch'n)
when you spin a bearing it is because of lack of oil between the bearing and the crank.....happens when you over rev, and the oil gets forced out of the area between the bearing and the crank....bearing heats up against the crank, causes to much friction, and then they spin in the journal......
someone correct me if i am wrong.....
someone correct me if i am wrong.....
Honda-Tech Member
Joined: Aug 2004
Posts: 12,098
Likes: 1
From: blavica
Re: spun bearing? Question why? (cmdr430)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by cmdr430 »</TD></TR><TR><TD CLASS="quote">when you spin a bearing it is because of lack of oil between the bearing and the crank.....happens when you over rev, and the oil gets forced out of the area between the bearing and the crank....bearing heats up against the crank, causes to much friction, and then they spin in the journal......
someone correct me if i am wrong.....</TD></TR></TABLE>
No, your correct sorta. The bearing spins always on the crank but it can cause issues if there is no oil in the crank side of the bearing. The spun bearing occurs when the bearing spins in the rod side, which also causes scoring on the crank journal.
Ryan is also correct in the stock vs built motor too. This is why whenever you build a motor again, always always always check your clearences.
someone correct me if i am wrong.....</TD></TR></TABLE>
No, your correct sorta. The bearing spins always on the crank but it can cause issues if there is no oil in the crank side of the bearing. The spun bearing occurs when the bearing spins in the rod side, which also causes scoring on the crank journal.
Ryan is also correct in the stock vs built motor too. This is why whenever you build a motor again, always always always check your clearences.
Honda-Tech Member
Joined: Aug 2004
Posts: 12,098
Likes: 1
From: blavica
Re: (CW-ITR)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by CW-ITR »</TD></TR><TR><TD CLASS="quote">I wonder if using (none harmonic balancer) crank pulley has any thing to do with the bearing failure.</TD></TR></TABLE>
This is debatable at best, but look at it this way, the engine is internally balanced so IMO I think an external balancer say CTR N1 will have no affect on the engine.
This is debatable at best, but look at it this way, the engine is internally balanced so IMO I think an external balancer say CTR N1 will have no affect on the engine.
Trial User
Joined: Mar 2004
Posts: 706
Likes: 0
From: norway, Norway
Re: spun bearing? Question why? (Dave_B)
uhm should the bearing spin/rotate?? when you install a new rod bearing does each half have a little tap that shoul slip in a groove. as you can see on the top left part of the rod on the picture. or have i misunderstod
Trending Topics
Joined: Nov 2001
Posts: 3,889
Likes: 0
From: Gone Racing
Re: spun bearing? Question why? (Hooch'n)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Hooch’n »</TD></TR><TR><TD CLASS="quote">
Just thought i would ask a stupid question to find out H-T's response.....Thanks
</TD></TR></TABLE>
see "need crankshaft" thread....
you sure you want to ask a technical question in the ITR forum? lmfao!
thats almost as crazy as asking kack to buy you a 
Just thought i would ask a stupid question to find out H-T's response.....Thanks
</TD></TR></TABLE>see "need crankshaft" thread....
you sure you want to ask a technical question in the ITR forum? lmfao!
thats almost as crazy as asking kack to buy you a
Thread Starter
Member
Joined: May 2001
Posts: 8,201
Likes: 1
From: Notgrapebutgreat, S.C./N.C., USof A
Re: spun bearing? Question why? (Johnny Tran)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Johnny Tran »</TD></TR><TR><TD CLASS="quote">
see "need crankshaft" thread....
you sure you want to ask a technical question in the ITR forum? lmfao!
thats almost as crazy as asking kack to buy you a
</TD></TR></TABLE>
i would do no such thing....... But you can buy me a XXX for being a dick!
see "need crankshaft" thread....
you sure you want to ask a technical question in the ITR forum? lmfao!
thats almost as crazy as asking kack to buy you a
</TD></TR></TABLE>
i would do no such thing....... But you can buy me a XXX for being a dick!
Thread
Thread Starter
Forum
Replies
Last Post
Unsivil_audio
Road Racing / Autocross & Time Attack
5
Jan 19, 2005 11:23 AM
