I read a article on THEOLDONE regards to him drilling out the main bearings from 4mm to 8mm ??

Has anyone done this on here?

Anyways old thread after a few PMs this is what i did.

 

Basicly drill it to 13/64 then oil and file it to 7-8mm

 

Yes, I've done it in the past, I also teardropped the crank oil holes so oil doesn't have to make a 90 turn.

 

Well drilled them from 2.9mm to 6mm filled them a chaffered them.

 

I did that on my d16 just for the hell of it, as well as devcon'd the oil pump. Still runs, 3500 miles self-built.

 

*chamfered

basically, yep; drill em to size, and make sure there aren't any edges that could scrastch or mis-wear anything.

 

Yeah chamfered

Just did them to 6mm and coned out the top and sanded it down with 2500 grit sand paper. I only see a tiny bit of cooper.

 

copper.


sorry I couldn't resist =D

 

And what is the best or safest way to drill out the baerings? I think and old mainjournat would be great. So the bearing would sit perfectly while drilling.
What Do you guys suggest for chamfering?

Does drilling make a significant advantage in point of bearing wear?

 

I dont get it , Is it the oil hole in the bearing you are reffering to? Is it get more oil to the bearing and journal?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jetlude &raquo;</TD></TR><TR><TD CLASS="quote">I dont get it , Is it the oil hole in the bearing you are reffering to? Is it get more oil to the bearing and journal?</TD></TR></TABLE>yes thats what he's talking about

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JDMCRX &raquo;</TD></TR><TR><TD CLASS="quote">I read a article on THEOLDONE regards to him drilling out the main bearings from 4mm to 8mm ??

Has anyone done this on here?</TD></TR></TABLE>


drilling out the main bearings? the bearings themselves? or are you trying to say the holes in the crank as in enlarging and chamfering the lube holes in the crank????????

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by agrn93ls &raquo;</TD></TR><TR><TD CLASS="quote">


drilling out the main bearings? the bearings themselves? or are you trying to say the holes in the crank as in enlarging and chamfering the lube holes in the crank????????</TD></TR></TABLE>he want to port match the bearings to the crank

 

http://theoldone.com/articles/...tips/

 

Oil feed holes on block are 8mm. oil holes stock bearings wer 3mm and i drilled them all out to 6.5mm

 

You're more likely to cause problems that prevent problems if you go messing with the crank and bearings. Leave them alone, hondas don't have bearing problems, it'll stay that way if you don't screw anything up.

 

Modified by six sigma racing at 3:48 PM 12/22/2007

 

I have never had oil starvation do to pump not getting oil . But i have had 3 motors spin rod bearings. Last motor number #1 rod bearing spun and took a **** kicking.

I only drilled enough to keep the cone on the feed hole and not mess up the plating on the bearing. Ill look for some pics

 

If you've had 3 motors spin rod bearings then you're doing something wrong. Figure out what you're doing wrong and the problem will be solved. Stock hondas don't have rod bearing problems, right?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">If you've had 3 motors spin rod bearings then you're doing something wrong. Figure out what you're doing wrong and the problem will be solved. Stock hondas don't have rod bearing problems, right? </TD></TR></TABLE>

D series have problem with spinning bearings.

 

Y blocks are the worst at spinning brgs.
IMO

 

h22 do

 

All 3 were stock OEM honda motors


<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by tony1 &raquo;</TD></TR><TR><TD CLASS="quote">If you've had 3 motors spin rod bearings then you're doing something wrong. Figure out what you're doing wrong and the problem will be solved. Stock hondas don't have rod bearing problems, right? </TD></TR></TABLE>

 

They were all rotten rod spinning Y8's too, weren't they?

 

y series suffer from the oil journal congifuration and a less efficient oil pump. People exaggerate the spinning bearings problem sometimes with the y-series. but it is true d16z6's suffer far less bearing failures all other things equal compared to y motors