Ok so b16, has micropolished crank, oem b16 rods. acl bearings, the crank mains gave me .002 across which is fine, but all 4 rods torqued at 23lbs are giving bigger than .001, so im guessing around .0008 wayyy to tight. What could be the problem, and how could i fix it?

I plastigauged it like 20 times already. Its just a tad bigger than the .001 mark.

 

did u get the std size rod bearings?
i would get smaller bearing to give u looser clearances on your rods like your mains
std size is greens 1.501-1.498
pinks 1.495-1.492
red 1.492-1.489
1.501-1.492=.0009 assuming its at the end of its ranges and you got clearances of .0008+.0009 = .0017
1.498-1.495=.0003 assuming the std is at the end of the clearance and the pink is in the beginning of the clearance. you get a clearance of .0008+.0003=.0011

also takes into account your .008 is correct but if its .007 that could make your clearances to tight with pinks, maybe red but it could maybe leave u at the edge of looseness, uhh i got a sick mind

ive never ordered honda bearing so idk where they mostly fall in the range
u need to mic the bearing if you want to figure out where its gonna lie in the range

 

Yes there acl std. Ya i dont see how i got such a tight clearance. I guess honda bearings it is.

 

not every honda motor come with all green or as acl likes to call std size, ive seen motors come with every color some with 2 different colors in one journal. your lucky all the main were green. honda doesnt label the green as std because theres no such thing as a std honda bearing

it all comes down to that first plastigauge sizing whether u shoulg get pinks or reds, if it was .0008 and it wasnt way to tight because minimum is .0011 only .0003 off

 

Well its my friends motor, i told him to get honda bearings and we would take the block to get mic'd and find the right bearings we need. He didnt want to pay the money cause they are expensive. Anyways he went with acl. I told him its not going to be a for sure fit. Ive actually had better clearance with king bearings in the past. The last ls motor i did for my other friend was .0015 across.

Anyways it is a tad bit bigger than the .001 so thats why im guessing .0008.

It it ok to use to different size halves in one journal?

Hm, i told him lets go get a couple honda bearings and mess around with it. But he is jobless and flat broke, and thats why he needs the car running so he can go back to his job. He wants me to just throw it together so he can dd it. But i told him i think with those clearances it will toast all the bearings and crank within the first 10 mins of driving for no oil clearance.

 

the mains were good as you said so the rods were your only worry, that should reduce cost not having to do the mains. i think its going to be pink or red. if your honda keeps bearings in stock, would only take an hour or two to plastigauge it then just buy 6 more. assuming all the journals and rods are the same size

 

Buy another set of acl rod bearings. See if they fit better. Between 2 sets im sure you can get the clearances you want.

 

if he buys another set, its going to be the same size because bearings arent ROUGHLY made the same, they are the same

 

So is it safe to use 2 different size halfs in one rod journal?

Like one half the acl, and one half a honda undersize bearing?

 

^ Yes as long as clearances come out correct. I would prefer to have the same brand/material bearing. But clearance is drastically more important.

 

i wouldnt have thought so till i saw it in a motor with it, that was running fine

 

Ok thanks guys!. "civickiller" you been lots of help. Much appreciated.

 

Its the same concept as running two different color honda bearing halfs.

 

I put in the order for 4 pink halves, im going to try 1 half on each rod journal and hope i get the right clearance. Good thing my friend has discount at honda, 9.81 each. With out it was 17 each.

 

i would try 1 pink first and if its still to tight. then i would try 2 pinks in 1 rod

 

You should tried jumping up to the ACL Race HX bearings. They're 0.001" smaller to give you that much more clearance. Instead of being at 0.0008", you'll end up at 0.0018".

http://www.aclperformance.com.au/Hon...C5Bearings.htm

There's still going to be some variance because I'm not sure how consistent the thickness is bearing to bearing, so you should still recheck.

 

Ok update, so i got 4 pink bearings. I did the plastigauge , and lets just say with 1 pink and one acl, and also 2 pinks in one rod journals, the plastigauge is so smashed beyond .001. Its like .001 and .0015 both together. WTF???

 

Ok so check this out. I took the acl bearings and put them on my "GSR" motor im building, and got perfect .0015 across. So I took one of my gsr rods and put it in the b16 just for testing. So i put the acls on it, and still got .001. Now i added 1 pink half, so 1 pink, 1 acl, and got way bigger than .001, the same thing with the b16 rods. So now i came to the conslusion this crank is no good. It has been micro polished im sure cause the journals are very shiny no scratches. So im going to try to find another b16 crank and test it out.

Kinda makes sense, mains are very loose, and rods are very tight. Seems like this crank has been messed with.

 

kind of unrelated but torque spec for b16 rods are 30 lb-ft.

 

i think the crank is still good

the acl's arent the same size as the pink
hardly youll find 2 cranks being identical

with the b16 rod, was the one acl and one pink have a clearance bigger than .02 ? how close to .015?

also rods can be different size too

 

Lets just say with one pink and one acl, it was so fat that it looked like .0005

 

what about 2 pinks?

was that on the same journal were you got the specs from?

 

same journal, 2 pinks is about .0009

 

so the clay was pretty much the same size as with the acl bearings? did u tq the rods to 30 or 23, thatll make a difference.

i dont think my math is wrong, someone plz double check my numbers.

maybe 2 reds to test or as some suggested acl race bearings, if the reds dont work or u can just jump to the race bearing.

i always thought the acl race bearings werent recommended because of the no coating on it?

 

isnt this for a b16? the one invtec posted was for b18c

http://www.aclperformance.com.au/HondaB16A2.htm