I am building a DOHC ZC. I bought ACL Race main and rod bearings for it. I used plasiguage on the rods they were fine but the mains were way to freakin tight. they are standard size bearings. tourqing the mains to 46ft lbs what the d16a1 called for should be the same for the zc but i cant even turn the engine over. any thoughts. I think that somebody put the wrong main bearing cap on the bottom of the engine. Is there a way to fix the issue? thanks in advance.

 

Have you had the block at a machine shop? It probably needs to be line bored/

 

the engine has never been to the machine shop i just got the engine it is not old at all just wanted to put better bearings in it.

 

remeasure and use oem bearings. no need to line bore if it doesnt have to. thats the last resort.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by exospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote">remeasure and use oem bearings. no need to line bore if it doesnt have to. thats the last resort.</TD></TR></TABLE> So a line bore is a last resort even if the mains have been switched? I'm just asking this because I will have to use a set of non-native mains for my sleeved block.

 

You should never even be using different mains. i'd never mix and match mains. if you have to, and no other choice, then of course you have to line bore. but for the price of a line bore, just get another block that has MATCHING mains.

but yes its the last resort in my opinion.

As far as the bearing issue, thats why we use OEM bearings on all our builds so that each clearance is EXACT to what we want. Most often you can use other bearing sizes to get it the way you want without having to machine the crank or the block.

 

it may not be necessary...id say to check the bore for out-of-round and taper...if its within spec your good but if not then a line bore is necessary...this is my understanding someone please correct me if i am wrong.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by exospeedAMcrx &raquo;</TD></TR><TR><TD CLASS="quote">You should never even be using different mains. i'd never mix and match mains. if you have to, and no other choice, then of course you have to line bore. but for the price of a line bore, just get another block that has MATCHING mains.</TD></TR></TABLE> Well this block is sleeved and is missing its mains, so I'm sort of S.O.L. on that aspect. How much is a line bore really?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suck my DX &raquo;</TD></TR><TR><TD CLASS="quote">it may not be necessary...id say to check the bore for out-of-round and taper...if its within spec your good but if not then a line bore is necessary...this is my understanding someone please correct me if i am wrong.</TD></TR></TABLE> I like the way that sounds, is that another option?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by dr_latino999 &raquo;</TD></TR><TR><TD CLASS="quote"> Well this block is sleeved and is missing its mains, so I'm sort of S.O.L. on that aspect. How much is a line bore really?

I like the way that sounds, is that another option?</TD></TR></TABLE>

depends of what you're machine shop locally charges of course, but i've seen them up in the 150-200 range.

 

If ACL's are universal fit, machining needs to be done to the block to accomodate them.
Honda specs diff size bearings -a design feature to save time for mechanics to replace-
If the crank is still w/in spec then it's easy enough to select the right color code bearing from Honda.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Suck my DX &raquo;</TD></TR><TR><TD CLASS="quote">it may not be necessary...id say to check the bore for out-of-round and taper...if its within spec your good but if not then a line bore is necessary...this is my understanding someone please correct me if i am wrong.</TD></TR></TABLE>

We aren't talking about the cylinder bore here. We are talking about the main bearing clearances.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by HumanResource &raquo;</TD></TR><TR><TD CLASS="quote">If ACL's are universal fit, machining needs to be done to the block to accomodate them.
Honda specs diff size bearings -a design feature to save time for mechanics to replace-
If the crank is still w/in spec then it's easy enough to select the right color code bearing from Honda.

</TD></TR></TABLE>

Exactly.

 

I think they are a universal fit. the place where i ordered them showed that they fit about every D16 there was.

 

I have contacted ACL by email about the bearings to seeif they are universal or if they are factory replacement will post when i hear back from them.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 90EFcivicsi &raquo;</TD></TR><TR><TD CLASS="quote">I think they are a universal fit. the place where i ordered them showed that they fit about every D16 there was.</TD></TR></TABLE>

I dont know if you are putting in your stock rods using the same crank and mains for this block, but what you have to understand is that clearances differ once you change up the cranks, install new aftermarket rods or other stock rods, do a line bore, and especially if you change the main caps.

Universal fit means that if it is still WITHIN the spec that the book requires, the ACLs may fit.

I've used a shoe size analogy before, but I think i'll use the T-shirt size this time.

Lets say I'm a t-shirt clothing manufacturer. I'm going to make a UNIVERSAL t-shirt size that I'm going to sell. From my calculations, most people will fit an XL so that would be the choice for my UNIVERSAL size. The guy that usually wears Large, will just have to wear a slightly looser shirt, and the guy who usually wears 2XL, will have to wear the XL which maybe a bit tighter than he's used to.
But what if your customer requires a S, M, 3Xl, or 4XL? If they wear the XL, its either way too loose or way too tight that they can barely move.

the best way is to make a size for each person so that you will accomodate for each fitment.

OEM bearings &gt; Universal bearings.

 

the engine has stock crank stock rods. I am just replacing the bearings. I wanted to go with race bearings because the car this engine is going in is used just for autocrossing. I wanted a bearing that will hold up to race condidtions.

 

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

We aren't talking about the cylinder bore here. We are talking about the main bearing clearances.</TD></TR></TABLE>
im aware of that...i was referring to dr discos issue not the OP.