motor rebuild questions

D15, D16, D17 and Mini-Me swaps
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motor rebuild questions

By 93hatcheg
- Sun Aug 30, 2009 7:16 am #140513 k im completly rebuilding my d16z6 motor because ima boost in a couple months :) i wantted to know if im missing anything or steps to my rebuild

oem oil pan gasket
oem front main seal
oem rear main seal
acl race connecting rod bearing
acl race crank bearings
acl thrusht washres
crank is getting micro polished
cylinders are getting honed
oem p28 piston rings
oem z6 head gasket
copper spray for HG
arp head studs
loctite and lotssss of assembly lube

anything else you rexomwnd let me know its all appreciated i want my motor fresh for the turbo kit :)

ohhh and is there a way to hookup my turbo kit and not run any boost for a while till i can save up to gett a tune?? thanks guys
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By Ajax1989
- Sun Aug 30, 2009 9:00 am #140518 umm bout the turbo thing

all you do it bolt it up and run teh oil lines
so the turbo can have lube but DONT hook up the charger pipes
and while ur driving your turbo will spool but no boost

idk if its a good idea tho, but it can also be a way to brake it in

and i was gonna eventually ask this question
too, i need this info too :thumb:
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By teal_dx
- Sun Aug 30, 2009 1:36 pm #140527
94_jdm_ferio wrote:umm bout the turbo thing

all you do it bolt it up and run teh oil lines
so the turbo can have lube but DONT hook up the charger pipes
and while ur driving your turbo will spool but no boost


I'm pretty sure with no resistance, this will allow the turbo to spool too freely creating 'over boost' which can damage the turbo.
I think he would be safer removing the wastegate spring so no pressure can build.

Also the rebuild list sounds complete... you doing the assembly work yourself of taking the bottom end to a machine shop for assembly?
How many miles are on this z6? You may want to price an oil pump if it is up there in miles...
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By 93hatcheg
- Sun Aug 30, 2009 4:13 pm #140543 i probably buy a new oil pump then cauase the car i got the motor outta says it had 201k on it but the internals look practicalley new??idk. but anyways ya im going to assemble everything and illl take the b
ock to a machine shoop for the other stuff
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By d-mon
- Sun Aug 30, 2009 8:07 pm #140566 just a couple of things-
don't use the ACL race bearings.
unless you're going to change them evry 5000 miles.
they are for race motors that get rebuilt often.
the other ACL bearings are just fine. mine have 20K+ with no problems.

why micro polish the crank? if it is damaged, get another one.
if not leave it alone. it will ruin the nitride treatment.

why new pistons?
unless you bore and hone (oversize) your old ones wil be fine.
i bored mine .5mm over and used new pistons.

what is locktite for?
building Honda engines requires torque wrenches, not locktite.

i didn't see rings on your list. i use Hastings.
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By 93hatcheg
- Sun Aug 30, 2009 11:37 pm #140592
d-mon wrote:why new pistons?
unless you bore and hone (oversize) your old ones wil be fine.
i bored mine .5mm over and used new pistons.

i didn't see rings on your list. i use Hastings.



im not using new pistons im reusing my original pistons with brand new oem honda piston rings.

as for the rod bearings what do you recomend instead of acl race?
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By d-mon
- Mon Aug 31, 2009 2:36 pm #140715 i use ACL rod and main bearings.
just not the race ones.
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By asianrob
- Mon Aug 31, 2009 2:55 pm #140722
d-mon wrote:just a couple of things-
don't use the ACL race bearings.
unless you're going to change them evry 5000 miles.
they are for race motors that get rebuilt often.
the other ACL bearings are just fine. mine have 20K+ with no problems.

why micro polish the crank? if it is damaged, get another one.
if not leave it alone. it will ruin the nitride treatment.

why new pistons?
unless you bore and hone (oversize) your old ones wil be fine.
i bored mine .5mm over and used new pistons.

what is locktite for?
building Honda engines requires torque wrenches, not locktite.

i didn't see rings on your list. i use Hastings.


i can probably answer some of these questions for him

why micro polish the crank?
why not. if it is going to be all fresh why not clean up the crank when its out. i havent had any problems when i got this done to my cranks.

why new pistons?
when the pistons are out you can clean up the cylinder walls. creating new crossweaves it the walls for better seal. and plus if he used the grand vitra pistons its better to have a nice clean wall instead of an old wall.

you should just go with the dura glide bearings its better for daily driving.
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By d-mon
- Mon Aug 31, 2009 8:49 pm #140857
asianrob wrote:i can probably answer some of these questions for him

why micro polish the crank?
why not.

because it will damage the treated surface of the journals. Removing metal wil also change the size of the journal making it 'sloppy' and wil shorten the life of the motor.
if the crank is not damaged, it will not need 'cleaning up' or micro polishing.

asianrob wrote:why new pistons?
when the pistons are out you can clean up the cylinder walls.
creating new crossweaves it the walls for better seal. and plus if he used the grand vitra pistons its better to have a nice clean wall instead of an old wall.


uh yeah... this procedure is called honing and is necessary any time the rings are changed.
but i was asking about the pistons.

asianrob wrote:you should just go with the dura glide bearings its better for daily driving.


or the ACL standard bearings as i had mention earlier
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By asianrob
- Tue Sep 01, 2009 3:17 am #140917
d-mon wrote:
asianrob wrote:i can probably answer some of these questions for him

why micro polish the crank?
why not.

because it will damage the treated surface of the journals. Removing metal wil also change the size of the journal making it 'sloppy' and wil shorten the life of the motor.
if the crank is not damaged, it will not need 'cleaning up' or micro polishing.

it barely removes any metal from the surface.. making it smooth. which is what you want on your journals.. it ensures that the oil film operates like it should. keeping the tolerance. case in point. your not moving enough metal to make any difference on the crank to make it sloppy.

its like decking the head and block to make smooth flat surface.

trust me. i built plenty of motors.

so "cleaning it up" is a good thing even if it is not damaged.



uh yeah... this procedure is called honing and is necessary any time the rings are changed.
but i was asking about the pistons.

why wouldnt you want to? if you are taking out the pistons i would do clean it up
would you trust old cross weave vs new?

asianrob wrote:you should just go with the dura glide bearings its better for daily driving.


or the ACL standard bearings as i had mention earlier[/quote]

ACL standard = duraglide
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By asianrob
- Tue Sep 01, 2009 3:28 am #140919 since your motor is apart. you should go ahead and change the valve seals to. so that why you are NOT running the olds. saves you time later on down the road.
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By d-mon
- Tue Sep 01, 2009 3:44 pm #140984
asianrob wrote:it barely removes any metal from the surface.. making it smooth. which is what you want on your journals.. it ensures that the oil film operates like it should. keeping the tolerance. case in point. your not moving enough metal to make any difference on the crank to make it sloppy.

its like decking the head and block to make smooth flat surface.

trust me. i built plenty of motors.

so "cleaning it up" is a good thing even if it is not damaged.


'micro polishing' the crank is unnecessary, and possibly detrimental on Honda engines.
just because someone will take your money for doing something doesn't make it a good idea.
under normal conditions, the crank journals(coated with a film of oil) will not wear, and should be in pristine condition. if not, source another crankshaft.
NO material should be removed.
removing material makes it smaller and closer to being out of service limits if it is not already.

it is NOTHING like decking the block or milling the head. that is for getting a good good seal with the head gasket and/or increasing compression. you can remove quite a bit of material from a head or block and still be OK.
crank journal tolorences on the other hand are very critical to the life of the engine.


asianrob wrote:
why wouldnt you want to? if you are taking out the pistons i would do clean it up
would you trust old cross weave vs new?

i said 'it is necessary any time you change your rings'. of course you would want to.
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By teal_dx
- Tue Sep 01, 2009 5:16 pm #141022 I got a knocking block for free which had some oil starvation. That crank definitely needed micropolished. Yes the tolerances will be different than OEM, but they make thicker oversized bearings to compensate for this, both Honda and aftermarket. (although last time I called around to dealerships, some of the OEM sizes were on severe backorder or discontinued)

Definitely get more than one honest opinion before micropolishing the crank if you are not sure if yours needs to be done. If the engine was taken care of, then probably not :thumb:
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By asianrob
- Wed Sep 02, 2009 2:07 am #141122 http://www.honda-tech.com/showthread.ph ... opolishing

[QUOTE=Luserkid;25815533]<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by B18CivicEg &raquo;</TD></TR><TR><TD CLASS="quote">how does micropolishing your crank help out??</TD></TR></TABLE>

Micropolishing is another word for resurfacing except its very very little taken off. Like the most is .0001 or something like that. You want to do this everytime you take off the crank from the mains/rods so you could get a fresh surface to add your bearings too.

/QUOTE]

oh and also it obviously reduces the friction on the crank

oh and it also gives you a piece of mind

oh and micropolishing DOESNT TAKE ENOUGH OFF THE CRANK to make a difference in bearing clearances.

another thread about mircopolishing

>http://www.honda-tech.com/showthread.php?t=448777&highlight=micropolishing < this is deff a good one.

http://www.honda-tech.com/showthread.ph ... opolishing

http://www.honda-tech.com/showthread.ph ... opolishing

http://www.honda-tech.com/showthread.ph ... opolishing

http://www.honda-tech.com/showthread.ph ... opolishing


if you are trying to say MICROPOLISHING will take enough to mess up your engine please do research.

i'm only insisting this because it does help. and IT WILL NOT THROW OFF THE NITRATE COATING ON THE CRANK.

grinding will obviously throw the crank off.

:thumb:

I know by experience.

i dunno where you got the idea that mircopolishing is bad. but please do research before knocking down a suggestion because you heard it was bad for motor.

theres numerous threads about it. IF done correctly it will not hurt the crank.
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By d-mon
- Wed Sep 02, 2009 2:27 am #141127 never said micro polishing is was bad.
just use good parts, (undamaged crank for instance)
garbage in, garbage out
i have thrown away cranks from motors w/ spun bearings.
apologies to OP, i don't like pissing contests
very simple concept.
use good parts to build good motors
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