Okay I know that you should resize the LS rod big ends when using ARP rod bolts. But is this necessary when using the supposedly stronger B16 or Type-R rods? The reason I'm asking this is because my buddy is building a B16 engine and his engine builder didn't know about ARPs and resizing the rods. I told him about that and how it should be done and he said he would do that. Now the bottom end is finished and when he was asked about the rod resizing he told us he measured the bore and it wasn't necessary. What do you think of this? Is this possible or apparently he didn't know what he was doing?

 

From what I know, because of the different tq load that you apply to the rod bolts you have to resize them. When I installed mine it threw them out-of-round quite a bit. I hope your friend isn’t trying to cut corners. But if he measured them and some how all of them came out to be a near perfect circle, call it a day and work on something else.

If, I were you, I would take them somewhere else and have them measured again with different tools just to be certain, especially if you’re questioning your friend’s work.

 

No, this wasn't done by my friend, but by an engine builder on my friends engine. This man told us that he measured the bore after torquing the rods to spec and no honing was necessary. I'm just not sure if we should trust his words though. The engine is assembled now so remeasuring is not an option unfortunately.

What type of rods were you installing?

 

Why not? what is $20-30.00 bucks worth in the equasion to know your rods are round and the correct size? Plus they look better.

 

Well, the cost of engine disassembly then reassembly...that's more like 100-200 bucks here. But the bigger problem is we wouldn't know where to take the rods to. This builder is supposed to be the best around here.

 

You are not going to take the engine apart to change rod bolts? Go for it as you allready have the answer and just wasted, mine and others time.
thought you wanted the correct answer, not the "I am doing this, please someone say it's ok" answer.

 

Thank you for your and others time for wasting it on me. I guess I was asking the wrong question, I know what should be done to the rods in theory. What I want is some input on positive or negative experience. So let me rephrase it this way. Have any of you engine builders ever used ARPs with B16 or Type-R rods where after measuring the bore resizing wasn't necessary? Just give me a straight yes or no. Thanks.

 

if you want a straight answer, let me give it to you.

NO!

now, go and get them checked out, and resized.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrious &raquo;</TD></TR><TR><TD CLASS="quote">if you want a straight answer, let me give it to you.

NO!

now, go and get them checked out, and resized.</TD></TR></TABLE>

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by gsrious &raquo;</TD></TR><TR><TD CLASS="quote">if you want a straight answer, let me give it to you.

NO!

now, go and get them checked out, and resized.</TD></TR></TABLE><TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by DonF &raquo;</TD></TR><TR><TD CLASS="quote">You are not going to take the engine apart to change rod bolts? Go for it as you already have the answer and just wasted, mine and others time.
thought you wanted the correct answer, not the "I am doing this, please someone say it's ok" answer. </TD></TR></TABLE>

It'll be cheaper in the long run to tear it down and do it now than pulling it all apart and replacing the rods and crank just to save from an inconvenience.


What kind of engine builder doesn't know about having to resize when installing arp's? At the very least it really does look pretty

 

i would think that any professional engine builder would know to resize automatically. the extra tourqe load usually distorts them some. i asked my engine builder about resizing and he said with arp's its a must when he's putting it together

 

your gonna pay someone 100-200 to remove an oil pan, then the the 2 rod bolts, take out the piston, check the bore...

wow.. thats weak. learn to build an engine yourself. It's really not that hard, if you have an iq over 60.. and expletive dood half the morning after a j i have the iq of a cat. I still manage to pull 12's out of a sohc n/a on a bad day..

really.. learn your ****... or tell you'r "friend" to stop being a bitch

 

It kinda sounds like this engine builder really doesn't know what he's doing after all. Even if he "says" they don't need to be honed, I'd rather spend the extra couple dollars to have it done...if nothing else than for peace of mind.

 

When I got ARP rod bolts put on my last LS Block build all rods came out to a perfect circle after torqued down and then checked. No resizing needed. I put over 50,000 miles on that block.

I just built an LS/Vtec about 2 months ago. I had ARP rod bolts pressed on the rods and only 1 had to be resized. It was barely out of spec. the other 3 were perfect circles when checked.

If you say the person that built your motor is a known legit engine builder, then he should be telling you the truth right?

If your not sure then take your block to someone else and have the rods checked, Who wants to drive a freshly built motor scared that a bearings gonna spin

 

That's useful info thanks. In the mean time this engine builder pulled the rods and checked them once again. He measured 0.015mm (that's 0.0006") being out of circle and said that was fine. He didn't hone them.

When you say out of spec what do you mean? What is the tolerance of the rods? I couldn't find this in the helms.