D16A main bearings in to D16Z
 

D series main bearings

Ok will main crank bearings made for a D16A6 fit a D16Z6 bottom end? I need this answered before tomorrow morning.

Re:D16A main bearings in to D16Z
 

yes

all the d16 cranks rods bearings head gaskets oil pumps pistons* etc etc are interchangeable


*will affect compresion ratio

Re:D16A main bearings in to D16Z
 

Thanks man, I hope youre right, cuz in the book it shows different part numbers.

I ordered bearings for a D16Z6 they gave me some gay ass bearings with the guides tapering out of the middle on five of the bearings instead at the edges where they should taper.

Re:D16A main bearings in to D16Z
 

bearings aren't something that either fit or don't fit. There are clearances involved. :-\

Re:D16A main bearings in to D16Z
 

Oh, good job on selecting the correct forum too. ;)

Re:D16A main bearings in to D16Z
 

Forum? lol, j/k

Well with hondas the clearances should be fine, the engine dosnt have alot of milage on it, I just need it to run.

I can work with the clearances later, but I just need to find bearings to replace OEM ones, and they kept giving me the wrong ones cuz someone fucked up the part numbers at the factory.

Re:D16A main bearings in to D16Z
 

You do know there isnt a "stock" standard set of factory bearings for one single Honda d-series engine right?

Example.. My d16z6 probably has different bearings than your d16z6. So when you go to the factory and ask for bearings, they are going to ask you what color you want. Each sides of the journal can use 2 different color of bearings too. So its very important to know what came out of your engine so you know what to put back in. Thats basically why they sell bearings in "halfs".

When going to a place like pepboys or napa and ask for bearings they are going to give you the "green" bearing which is about in the middle of the specs. ACL/Clevite etc etc. Sometimes you can get lucky throwing these in, sometimes you can get real unlucky, thats why I highly recommend plastigauging every bearing cap.

But to answer your question, Will a D16a bearing fit a D16z.. yes

Re:D16A main bearings in to D16Z
 

Thanks jeff, yeah I asked around and people told me the same thing. I heard alot of people getting lucky with low milage motors so I aint too worried. i'll just make sure all the clearances are within spec and i'll be happy.

Re:D16A main bearings in to D16Z
 

It has nothing to do with mileage (provided the oil was changed regularly). I have disassembled Honda engines with 220,000+ miles with less than .0002" crank journal wear.

Honda cranks are nitrided (heat treated). This process changes the journal size slightly, therefore each journal needs to be sized individually. There are five letters stamped on the bellhousing of the block, with five corresponding numbers on the main journals. This combination allows the proper bearing size (color) to be fitted for that journal.

Re:D16A main bearings in to D16Z
 

well how bad can it be, as long as i'm within tolerances then I should be fine.

Re:D16A main bearings in to D16Z
 

K the crank bearings are all the same, and there isnt much tolerances involved, there is no rotational mass on the crank where its housed, only the rod bearings need to be plastiguaged, I also got my bearings in and they fit good and snug.
My good friend who built a bunch of engines told me this so i'm just passing it on.

Main crank housing = standard bearings will do.
Rod bearings = you need to use plastiguage, however I heard that some guys built blocks using the specified bearing sizes spun them cuz the tolerances were too right, where as other guys used the green bearings and never had a problem.

Re:D16A main bearings in to D16Z
 

sorry to tell u but u gotta plastiguage the main bearings also

Re:D16A main bearings in to D16Z
 

you gotta make sure theyre all within spec, and most of the time 99% of the time its the same amount of wear to the journals, there is no rotational mass on the mains, just the rod bearings. I'm just gonna put in the medium greens that I got and it should be fine.

Re:D16A main bearings in to D16Z
 

i dunno if u know this but the mains are subject to oscillations

basically all cranks tend to wobble a bit so id do it once and id do it right
plastiguage it u lazy bastard

Re:D16A main bearings in to D16Z
 

with what you said about the bearing clearances if the ones from pep boys are tighter in one journal than another would it be a good idea to have the journal thats tight to be machined to set clearance?

did i make any sense?

Re:D16A main bearings in to D16Z
 

Yes you made sense, but no you dont machine honda cranks. Honda cranks have a nitrade coating on them, and places that machine cranks usually dont touch these. It's not like a SBC 350 where you can grind every journal down and say ya its a .30 bearing.

A long time ago when I had my built ZC, I was so sick and tired of buying god damn ------- bearings from the dealer to get the thing to be perfect. I told the guy at the crank shop to grind the entire nitrade coating off and make the bearings all 1 ------- size.

Another reason why I got rid of it ;)

Re:D16A main bearings in to D16Z
 

You obviously know very little anout Honda engines, and you didn't listen to a ------' thing I said, and that's fine. I know i won't be the one with a mysterious knock coming from the bottom end. :P

Re:D16A main bearings in to D16Z
 

It would be a wise idea to listen to what they're saying...I tried a rebuild about a year ago with clevite bearings, and was in to much of a hurry to plastigauge the journals. All i wanted was to get it back together to get back and forth to work. Well, worked fine for about 2 weeks, until it started knocking cause their was too much clearance and i had no oil pressure. Usually the bearing "colors" are stamped on the block i beleive, just cross reference the number to the color you need and order the correct one. Otherwise, start saving now for a new motor :-X