I recently pulled a b16a1 head off and I want to measure how much was milled off....it's been a while since the last rebuild so they can't remember exactly how much was taken off. I was planning to use a dial indicator and measure the height between the head and the limit mark (small square groove at the bottom end of head) but don't really know how to mount the indicator to acheive a good measurement.

If anyone knows or have a better way to measure the amount milled, please reply. Tia.

 

i always send it to the machine shop to have it measured. just make sure the shop KNOWS honda heads

 

I'm not trying to send it to a machine shop for just a measurement.....
Someone in here gots to know....

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 3rdGteg &raquo;</TD></TR><TR><TD CLASS="quote">I recently pulled a b16a1 head off and I want to measure how much was milled off....it's been a while since the last rebuild so they can't remember exactly how much was taken off. I was planning to use a dial indicator and measure the height between the head and the limit mark (small square groove at the bottom end of head) but don't really know how to mount the indicator to acheive a good measurement.

If anyone knows or have a better way to measure the amount milled, please reply. Tia.</TD></TR></TABLE>

i concur with taking it to a known machine shop and having them measure it.

 

I thought I heard at one point, there was a line on the head, small and inconspicious... you could measure from the line to the bottom of the head, and then compare that against stock... But, I have no confirmation on that.

 

Thanks for the reply......any other suggestions from experienced engine builders?

 

ttt

 

indicators are at the top part of my old head...but measuring them doesn't mean the surface is totally flat. i suggest straight edgeing for flatness with feeler gauge in all directions and having the machine shop as suggested check it that knows honda heads. But you can get a rough idea by checking an untouched head against a milled head measuring that indicator

 

Without the proper measuring tools you will not get a correct reading. I am a machinist and you should really take it to a shop. They will be able to measure it to .0001 of an inch.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by NateTEG95 &raquo;</TD></TR><TR><TD CLASS="quote">Without the proper measuring tools you will not get a correct reading. I am a machinist and you should really take it to a shop. They will be able to measure it to .0001 of an inch.</TD></TR></TABLE>I have access to tools that'll measure to .0001" accuracy, just need advice on which tool is the best for something like this......if a dial indicator is used, which way is the best to mount it and where to measure to get a good reading. If other precision measuring tool is needed, please list and please input an advice on the best way to use it on this kind of measurement.
Thanks for anyone who've replied. Any other suggestion welcomed.

 

Just use depth mic on the small pads that lip was talking about. If you look at his pic at the one in the upper left side and measure there you should be at .040 on a stock pr3 head. (((I Think))). I'm not 100% if that was the # cause I measured it like 2 years ago. Just have someone with a uncut head measure theirs for you. So you have a baseline.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 3rdGteg &raquo;</TD></TR><TR><TD CLASS="quote">I recently pulled a b16a1 head off and I want to measure how much was milled off....it's been a while since the last rebuild so they can't remember exactly how much was taken off. I was planning to use a dial indicator and measure the height between the head and the limit mark (small square groove at the bottom end of head) but don't really know how to mount the indicator to acheive a good measurement.

If anyone knows or have a better way to measure the amount milled, please reply. Tia.</TD></TR></TABLE>

the square groves on the bottom of the head average around 43-44 thous of an inch for the heads I had time to measure ... a lil depth mic will give a good idea. Not sure why you're trying to find out why head was milled, are you concerned about p-v clearance ? trying to compute compression ?
The ideal way to measure is cc on each chamber with liquid should give a stock pr3 head ~42.7cc and ~41.6cc on a P72 head.

Greg

 

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

the square groves on the bottom of the head average around 43-44 thous of an inch for the heads I had time to measure ... a lil depth mic will give a good idea. Not sure why you're trying to find out why head was milled, are you concerned about p-v clearance ? trying to compute compression ?
The ideal way to measure is cc on each chamber with liquid should give a stock pr3 head ~42.7cc and ~41.6cc on a P72 head.

Greg</TD></TR></TABLE>Yes Greg, I'm trying to find out how much the head is milled so I can figure out if the dome of the pistons I'm planning on getting will not hit the valves. I know claying the motor will tell me exactly where I'm at also at that matter, but I just want an idea before even purchasing those pistons. So a "depth mic" on those grooves where Lip pointed out is my best bet in this situation right....
I'll try that out; Thanks everyone above with the replies and pictures

 

Did that method work to figure it out? I'm going through a similar problem right now and don't have a machine shop close to me I bought the original engine from a collage that completely rebuilt it and can't find any of the paper work im trying to use the cylinder head off this engine and mate it with a b20 block for my dirt racecar so it's pretty vital to know before buying new pistons

 

 

Yeah I noticed that after I already posted it haha