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engine rebuild questions...why haven't i seen this in build threads/anything

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Old Dec 1, 2012 | 09:28 PM
  #1  
GoodSkoolRevltn's Avatar
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Default engine rebuild questions...why haven't i seen this in build threads/anything

Long story short. I am doing a rebuild, still tearing it down. Ive read through and through many build threads, figured out tools needed, and am in the process of putting things together from a preparation standpoint. I've also been reading over a helm's manual here and there.
My questions are, how come in threads it is not really discussed about topics such as rocker arm to shaft clearance, camshaft to holder (cam cap) clearance, valve guide to stem clearance, etc.
I will mention cali-dad's build thread
https://honda-tech.com/forums/showth...calidad&page=2
I am just mentioning his thread because he does measure valve clearance, but only because he has valve-to-valve issues due to oversized valves and bigger cams. (somewhere in the 100's pages of the thread)
are these all given's that you should obviously check when doing a build, or they are seldom mentioned because they seldom exceed service limits?
Also, this would require another cylinder bore gauge, one that can measure these little guys, most engine builds mention cylinder bore/dial bore gauge tool measuring from 2"-4" and to the .0001. Doing a quick search, I can't really find such a tool, I suppose a dial caliper would suffice, and be the more economical route, right?
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Old Dec 1, 2012 | 09:57 PM
  #2  
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

Hmm how to put it, I guess it's just a given that you check all clearances when building a motor with aftermarket parts?
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Old Dec 1, 2012 | 10:37 PM
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

I guess to shorten my question... (first off, yea duh i suppose you should check all clearances everywhere)
but just for example...in so-n-so's detailed stock re-build thread (hypothetical speaking)
"i checked my main's, rods, etc etc...checked my bearings clearances...triple checked and plastigauged everything...its POYFIKTTT!!!"
a build goes on...assembly continues...put together...dropped back in...bolted up...fired up and life goes on...
but I've yet to come upon...
"I checked my cam clearance to cam caps/holders, and my caps exceed limits F*** ...or... "I'm doing a stock rebuild and my rocker arms are worn or rocker arms to shaft clearance are not up to spec"
or just a simple... " I checked my cam clearance on my stock cams for this build and everything is up to par etc"
Do you get what I'm asking?
Is it because these things rarely exceed limits?

EDIT: Yes I comprehend that cam lobes can wear, springs can need to be replaced, and so can valves, but how come you do not often hear about things i mentioned earlier?
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Old Dec 2, 2012 | 01:00 PM
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

Originally Posted by GoodSkoolRevltn
I guess to shorten my question... (first off, yea duh i suppose you should check all clearances everywhere)
but just for example...in so-n-so's detailed stock re-build thread (hypothetical speaking)
"i checked my main's, rods, etc etc...checked my bearings clearances...triple checked and plastigauged everything...its POYFIKTTT!!!"
a build goes on...assembly continues...put together...dropped back in...bolted up...fired up and life goes on...
but I've yet to come upon...
"I checked my cam clearance to cam caps/holders, and my caps exceed limits F*** ...or... "I'm doing a stock rebuild and my rocker arms are worn or rocker arms to shaft clearance are not up to spec"
or just a simple... " I checked my cam clearance on my stock cams for this build and everything is up to par etc"
Do you get what I'm asking?
Is it because these things rarely exceed limits?

EDIT: Yes I comprehend that cam lobes can wear, springs can need to be replaced, and so can valves, but how come you do not often hear about things i mentioned earlier?
Haha its because there is no clearances to check when it comes to the cam caps, they are lined bored for the head it came with. If you have cam caps from a different head you will need it lined bored with the head. They have a certain torque sequence and torque amount on the bolts. Nothing else to that.

To check your "cam clearance" you perform whats called setting the valve lash. What else do you need to know on how to build the motor? seems you got it mostly down..

Are going to actually re hone the block and perform the valve job your self ect.?

Imo if your a amateur and don't have the proper machines or access to them i would leave that up the machine shop. You can save a whole lot still by assembling the head to the block and the rest your self. screw any of the clearances up in the block your gonna slap your self when it runs like poop and performs poorly or breaks down before a few hundred miles do to poor assembly of the engine. gl..
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Old Dec 3, 2012 | 06:16 PM
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

i am planning on doing the rebuild myself as much as possible
tools i plan on buying
dial caliper
straight edge
spring compressor
ring compressor/piston holder
micrometers
dial bore gauge
rod bolt stretch gauge
honing (deglazing) tool (depending on condition/taper if any of cylinders and whether it needs to be bored)
torque wrench
have a feeler gauge
home made valve adjusting tool

i realize this is a hefty investment, but one i feel will pay off in the long run...along with the experience.
long story short. i bought a honda. in my noobness and running out of time to find a vehicle, i bought it.
turns out the vehicle was clearly boosted, brought back to a lightly modified state, and sold to me. there were any given amount of signs to run away and fast from the vehicle to an experienced eye, one i did not possess at the time.
a whining noise was coming from somewhere in the car (unsure of where it was coming from)
brought it to an acquaintance i made, we did a compression test, and it read
cyl 1 - 130
2-4 -210
i drove the car around with him, and he said it was probably a spun bearing/ on the verge/ some sort of bottom end damage...however there was no knocking
also i feel there was a poor valve lash done, and there was a ticking in the head due to this...or possibly bent valves or god knows what else
never corrected the valve lash...maybe i should have as it may have fixed the compression...but still i feel clearly there are more issues than this
cel light in dash was clearly taken out
top left cam cap thread for the valve cover acorn nut was stripped/ and the valve cover was leaking from everywhere
oil pan gasket was broken and on the car
other stripped screws and threads in numerous places (some i have threaded already with heli-coils or whatever there called
also...my bell housing has globs of jb weld at the driveshaft...probably something snapped somewhere in its poor life
after going over the pile of receipts i got hiding in the car...i've gotten this far
"valve job" -how its stated on receipt
head resurfaced
i suppose a few intake and exhaust valves reseated
valve guides replaced
new pistons
o rings
main bearing
rod bearing
stress washers
block bored and honed
crank pollished
rods checked
from the previous title. i can say that the car was driven for less than 5k, boosted, and then sold to me.
A bad introduction to the world of honda's, but with a lot of tlc i hope i can bring her back to glory.
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Old Dec 3, 2012 | 06:44 PM
  #6  
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

Originally Posted by GoodSkoolRevltn
i am planning on doing the rebuild myself as much as possible
tools i plan on buying
dial caliper
straight edge
spring compressor
ring compressor/piston holder
micrometers
dial bore gauge
rod bolt stretch gauge
honing (deglazing) tool (depending on condition/taper if any of cylinders and whether it needs to be bored)
torque wrench
have a feeler gauge
home made valve adjusting tool

i realize this is a hefty investment, but one i feel will pay off in the long run...along with the experience.
long story short. i bought a honda. in my noobness and running out of time to find a vehicle, i bought it.
turns out the vehicle was clearly boosted, brought back to a lightly modified state, and sold to me. there were any given amount of signs to run away and fast from the vehicle to an experienced eye, one i did not possess at the time.
a whining noise was coming from somewhere in the car (unsure of where it was coming from)
brought it to an acquaintance i made, we did a compression test, and it read
cyl 1 - 130
2-4 -210
i drove the car around with him, and he said it was probably a spun bearing/ on the verge/ some sort of bottom end damage...however there was no knocking
also i feel there was a poor valve lash done, and there was a ticking in the head due to this...or possibly bent valves or god knows what else
never corrected the valve lash...maybe i should have as it may have fixed the compression...but still i feel clearly there are more issues than this
cel light in dash was clearly taken out
top left cam cap thread for the valve cover acorn nut was stripped/ and the valve cover was leaking from everywhere
oil pan gasket was broken and on the car
other stripped screws and threads in numerous places (some i have threaded already with heli-coils or whatever there called
also...my bell housing has globs of jb weld at the driveshaft...probably something snapped somewhere in its poor life
after going over the pile of receipts i got hiding in the car...i've gotten this far
"valve job" -how its stated on receipt
head resurfaced
i suppose a few intake and exhaust valves reseated
valve guides replaced
new pistons
o rings
main bearing
rod bearing
stress washers
block bored and honed
crank pollished
rods checked
from the previous title. i can say that the car was driven for less than 5k, boosted, and then sold to me.
A bad introduction to the world of honda's, but with a lot of tlc i hope i can bring her back to glory.
Sounds good, rebuild it! GL.
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Old Dec 3, 2012 | 07:41 PM
  #7  
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

Don't judge what is done in rebuild threads as what needs to be done in a proper engine rebuild. Not all rebuilds are documented and there is a wide range of "rebuild" from hone and re-ring to blue print and balance. Time and money dictates what one will do. Yes you can take short cuts and ignore some things that have proven to be reliable (we've all done it) and you may end up just fine. In the end, your knowledge and your goals will dictate how your engine build goes.
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Old Dec 3, 2012 | 08:08 PM
  #8  
GoodSkoolRevltn's Avatar
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From: Central Florida/N.FL
Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

point taken kchung...and taking things with a grain of salt will be used accordingly...I'd like to think I am on the right track for taking on such a build...I've done lots of research...perhaps still not enough as it never seems enough...but just need to dive in
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Old Dec 8, 2012 | 02:45 PM
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Default Re: engine rebuild questions...why haven't i seen this in build threads/anything

I need the torque sequence for a D16a6 rocker pedestal. Any 1 help me ?

Last edited by Jim Huffman; Dec 8, 2012 at 11:38 PM.
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