I am installing new crank and rod bearings in a H22. I know there shouldn't be a big difference in resistance in turning the crank after the mains are torqued down.

I have plastiguaged and all mains are in the tight end of Honda spec with ACLs.

When i start to turn the crank there is very little resistance to get it going and turns as it should but when i let it sit for a day or so it initially takes alot more to get it started.After that first time starting it, it starts really easy as it should

I have used lots of assembly lube as well. This doesnt really make sense to me. Anyone have any input. I dont want to finish assembly of the engine there is somethig wrong and find out the hard way.

Thanks in advance.

 

if the rods/rings are installed then a little resistance is expected. if its just the crank then there should be none at all.
what did the plastiguage come out to anyway?

 

they were all between .001 and .015. so tighter than id like but within honda spec.
Also yes, the rods and pistons are in it

It turns just as id expect with the exception of when it sits overnight. It is a little tougher to start turning after it sitting over night.
Then as soon as I start it turning once I can stop it and start it all day with the resistance i would expect.

Just wondering if anyone has any other thoughts, I dont understand why it does what its doing

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by huge230 &raquo;</TD></TR><TR><TD CLASS="quote">they were all between .001 and .015. so tighter than id like but within honda spec.
Also yes, the rods and pistons are in it

It turns just as id expect with the exception of when it sits overnight. It is a little tougher to start turning after it sitting over night.
Then as soon as I start it turning once I can stop it and start it all day with the resistance i would expect.

Just wondering if anyone has any other thoughts, I dont understand why it does what its doing</TD></TR></TABLE>

is that what the rods came out to also

 

yes they the rod bearing clearances were more or less than the same but they are not the problem because they are not even torqued down yet after i plastiguaged them. They are in and good and snug but not torqued right down
thanks for the help

 

maybe the rod caps are getting in a slight bind since they are not torqued down.try to torque them down and see what happens. what rods are you using?
also i think you'll be ok on the mains but i would either have them resized for the acl's or get honda bearings and dial them in that way. you really want them a little looser than .001. if you decide to run it like that run a very thin oil

 

i am 99.99% sure its not the rods binding since they are tight just not torqued but I will try anyways.

I may do that and get honda bearings but at the same time would the tight clearances have anything to do with it being hard to start turning after it sits for a day?

Because like i said after the initial time to start it turning, i can stop and start it with ease all day. Even the 1st time isnt really hard but harder than it should be.

thanks again for the help

 

if the bearings are tight enough to touch the crank then yes it could cause it. after you try to torque them take them off and inspect to see if any of the journals may have been rubbing a bit. what did the original rod bearings look like when you diasembled the motor. any bad wear spots like the crank may have been touching?

 

the old bearings looked fine, no uneven wear at all.

With the ACLs i have also tried taking the caps of once and re torquing. There was no wear on any of the bearings or crank at all and was cautious torquing it down not to over torque

I understand what your saying about the bearing rubbing the crank and what not but why can i start the crank turning with ease after the first time. Hope im explaining the problem correct heres an example

Now....go start the crank turning, its a little tough
1 min later.......start it turning with ease
20 min later......cranks starts turning with ease
etc..
24 hrs later......a little harder to get the crank turning
2hr+1min.........crank starts with ease

 

seems like you double checked everthing. i would say that the rings are just seating or settleing in after they set a while if you know what i mean,i suck at teaching. thats why at first you have that initial resistance. i wouldnt worry about it since you seem to pay attention.
i would get the honda bearings and dial in the clearances a little better,or have the rods resized to the acl's then you know they are round.

 

Ok thanks alot for the help.

ANyone else have any ideas/opinions?

 

measure breakaway torque and report back

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mmuller &raquo;</TD></TR><TR><TD CLASS="quote">measure breakaway torque and report back</TD></TR></TABLE>

After sitting overnight, it was just over 20ft/lb
and then after the initial one, it was approx.11ft/lbs.

This is with 4 pistons and all new rings

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by huge230 &raquo;</TD></TR><TR><TD CLASS="quote">

After sitting overnight, it was just over 20ft/lb
and then after the initial one, it was approx.11ft/lbs.

This is with 4 pistons and all new rings</TD></TR></TABLE>

mmmm, seems a little high to me

 

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

mmmm, seems a little high to me</TD></TR></TABLE>

do you have any thoughts on the difference when it sits overnight?

After the initial one, although 11ft/lbs may be high it feels real easy an comparable to other engines i have turned over but still dont know why it takes 20 to start after sitting overnight

 

bump for thoughts

 

no more thoughts

 

plastiguag is inaccurate and that can be your problem your Clarence might be tighter then you think also there is almost no way the Clarence is the same on all the mains considering that when Honda did the block they used Milty sized bearings to get the right Clarence and your now using 1 size bearing but this is just my 2 cents