Head Prep Questions

[TheSaint]

hey guys

im in the process of prepping a D16y1 Head (same as D16z6) to put onto my D15b7

i have dissasembled everything and got the head down to just the valve guides
im also going to take it into the machine shop for a clean, skim and check for any possible problems

i have a few questions...

1. my garage is fully enclosed - but the valve guides and a few other bits have started to corode a little - will the machine shop be able to deal with this or will they have to be replaced?

2. i cant seem to get the valve stem seals off - will the machine shop do this for me?

3. lastly - im going to do some very light PnP work on the head - should i do this before or after i take it into the machine shop?

thanks for any constructive replies!!

:o

[TODA AU]

hey guys

im in the process of prepping a D16y1 Head (same as D16z6) to put onto my D15b7

i have dissasembled everything and got the head down to just the valve guides
im also going to take it into the machine shop for a clean, skim and check for any possible problems

i have a few questions...

1. my garage is fully enclosed - but the valve guides and a few other bits have started to corode a little - will the machine shop be able to deal with this or will they have to be replaced?

2. i cant seem to get the valve stem seals off - will the machine shop do this for me?

3. lastly - im going to do some very light PnP work on the head - should i do this before or after i take it into the machine shop?

thanks for any constructive replies!!

:o

1: Spray the head with machining oil or WD, a light blast will clean the corosion off at the head shop though but it means you need to be utterly 100% when cleaning before fitting later.
2: Head shop will do this, no problem. Or buy this tool - http://www.engineproblem.com.au/seal.htm
3:Port the head before the service incase you damage a valve seat. This can then be sorted by the head shop. (avoid touching the seats with your porting tools though, casue if you stuff them you'll be up for new seats which will add considerably to the bill)

[TheSaint]

i was just going to give the ports a light run with 60grit dremel tool to remove cast seems and imperfections
i was going to go up to the seats with 60grit - than just use a steel brush dremel tool to polish the seats up - not really going to touch them with abbrasive bit

they are going to check the head for warpage, than clean and skim it
they will also give me a quote on 3angle job, re-seat, and oversized valves - they said they can assemble it as well - but i can do that myself

im going to get the machine shop to clean the head - but all the local shops i ask say they will sandblast - is this ok?

[krogoth]

sand blast the whole head? is that necessary? i mean it is getting skimmed right?

i guess its ok? never seen it done though, but im not basing this off any huge experience....

[dougie_504]

IMO prep the head first bro, then get the shop to give it a good clean so you don't get much crap left in there when you start it up fresh. Always keep the parts oiled and air-tight if need be.

[TheSaint]

anyone know if i can use the Bisimoto Cam Gear i have for the D15b7 with the D16y1/z6 - or will i have to get a different cam gear?

[mocchi]

1: Sp.... http://www.engineproblem.com.au
...hich will add considerably to the bill)

god damn. thanks for sharing good website.

[dougie_504]

Bro, should be fine to use the same cam gear.

[gensport]

get the head serviced first. the shop will have to tip the valves after the seats have been cut. after this the valves should go back in the same spot, number the valves when you take them out. if you not using a carbide tool, you wont hurt the seats. their easy to put back together when all cleaned. Have a look at miss_motorsports build thread to see how we did the ZC head and manifold.

[TheSaint]

yeah i have labelled all the valves/springs/retainers and stored them in some dish washing gloves lol
im going to do a light 120grit sanding run on the exhaust ports and a light 60grit run on the intake ports
i will remove some material from the exhaust ports but plan to leave the intake ports fairly stock
i will do an anti reversion gasket/port match up as well

than once this is done im going to take the head to the machine shop to have it checked, cleaned, skimmed and get their advice on what to do about valves and valve seats

if there is anything im missing please let me know

[gensport]

sounds like you got it covered.... enjoy

[egb16b]

i'm thinking about chucking a d16y1 head onto my b7 as well.. interested to see how this turns out.

keep us posted.

[beeza]

How much will be shaved?

I heard 0.010" = .4 of a point which = 4hp & 4 lbs of low end torque.

[TheSaint]

im not shaving the head just skimming it

going to use a thinner head gasket for a tad more compression

[beeza]

Ah I see!

[TheSaint]

still trying to figure out which head gasket to use tho...
at first everyone said to use a standard D16y8 head gasket but than some people said to remove the middle layer
now im reading articles that say there are several versions of the D16y8 head gasket ... so confusing!!!!

[beeza]

I believe it's not worth changing for the 1 point increase,not worth the risk.

Stick with the stock HG.

And shave 0.010" off :)

[TheSaint]

whats the difference between shaving the head and using a thinner gasket?
wouldnt they acheive the same results?

im not keen on modifying a head gasket - i just want to put one straight on - but i would like to use one that bumps up compression a bit

[beeza]

Using a thinner hg is the cheap way to bump up comp. but U are getting headwork so really its best to do it properly and not risk running a thinner hg.

That's the bottom line aye.

On d-series.org they work out what compression they want then the parts and work done to achieve it but that figure 0.010" is the standard amount to shave off a d-series head but check that out offcoarse..

[TheSaint]

so when i send it to the machine shop instead of skimming ask for 0.010" off and than just use a standard D16 headgasket?

[dougie_504]

I don't think there's anything wrong with just using a Y8 HG. If I ever have to change my HG I'm going to use a Y8 then go maul everybody with my bumped compression :D

[beeza]

so when i send it to the machine shop instead of skimming ask for 0.010" off and than just use a standard D16 headgasket?

I believe so but not 100%

To be 100% sign up if your not a member to d-series.org and ask.They are very helpful if U ask right...Great guys.

Tell them your set up first then ask the question instead of the whole question being drawn out..know what I mean? :)

Different setups I would imagine require different amounts to be shaved off but I remember 0.010" being a standard for the d.

d-series.org is where U will get that sort of info!

[gensport]

i would not tamper with the head gasket, and the standard one work quite well, i'd take the .010 off. it will need to be skimmed anyway.

[TheSaint]

yeah iv been poking around on D-Series for a long time now - its where i get all these crazy ideas lol

i would just slap in a D16y8 headgasket - but its very confusing on which part number will yeild the bumped compression because apparently theres like 3 versions of it

[beeza]

hahaha yeah,those guys are on to it.

I just Love what they do with the d in the states aye.

This is my favourite thread atm:

http://honda-tech.com/showthread.php?t=2112994&page=47

Go Hard Saint!

[gensport]

gotta love the yanks

[dougie_504]

How much does it cost to have the head shaved, compared to buying a Y8 HG?

Also if you guys don't mind me asking, what kind of prices do you usually pay for:
- Hot tank cleaning head and/or block
- Decking head and/or block
- Honing block
- Crack test of block


Just curious because obviously it's important to give the head a good clean if you shave anything, but probably not such a big deal if you're just changing HG (assuming the head/block mate well to begin with).

[TheSaint]

im getting the head checked for vacc seal, warping/bending and the valves and valve guides all checked
as well as a clean and a skim all for around $150 at my local head/machining shop

if i get any serious work done im going to take it up to Perth - but these guys should be ok for what i need

[TheSaint]

BEEZA! - why would u show me this?!
now im doomed to months of cleaning and painting!!!!

runs off to clean and paint engine block + gearbox!

http://honda-tech.com/picture.php?albumid=18480&pictureid=71541

[beeza]

AHAHAHAHAA!!

Love it!!!!!

Man those bay's look So Sweet Aye :)