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Old 11-07-2012, 08:44 PM   #1
05PandaSti
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Default Head assembly - how to

I have been searching for a guide on how to re-assemble heads. Im more-so looking for how to measure and adjust the shims and such. Looking at possibly building a set of heads soon and i would like to do most of it myself (besides machine work). If there is a good thread, I missed it obviously. Thanks in advance everyone.
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Old 11-07-2012, 09:43 PM   #2
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Get yourself a set of offset feeler gauges, go to ken-Gilberts.com for the cylinder head manual.

You need a few specialty tools, OH valve spring compressor, I use a valve seal puller, and a magnetic small flat head. A pick set is a real helpful set of tools too.
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Old 11-07-2012, 10:16 PM   #3
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Buy a set of scrap heads & practice first
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Old 11-08-2012, 07:52 AM   #4
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Sizing buckets/tipping valves is easy math. I'd recommend you not tip the valves and just spring for the buckets It's easier.

under the bucket you will find a number ex: 400

that mean it's taking up 4.00mm

.1mm = .002 thousandths

you need to add or subtract usually subtract if your cams have a decent ramp rate.

sometimes you can mis match a few bucket's

so say your bucket is 410 (4.10mm) and you measure .006 on your feeler gauge. and your cam card call's for .008 you need to subtract .1mm to get .002 extra clearance giving you a bucket of 400 (4.00mm) Are you paying attention?

If so you'd notice You need to take out .10mm to get a .008 total clearance.

Make sure you Tq to spec in Seq and use plenty of oil on the feeler gauge. Lobes need to be pointing up inline with bucket. If you never used a feeler gauge the proper way to check clearance is to check and check over and over. You think it's right huh? go check it again! You don't want the gauge to bind rather glide with little resistance!

Think about it like setting drag on drum brakes!

I take donations LOL

Last edited by spoolinsti05; 11-10-2012 at 06:01 PM.
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Old 11-08-2012, 09:00 AM   #5
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Thanks a ton guys! Very helpful. Haha yeah I found the kengilbert site after I posted this. Doesn't explain shims as well as you all did though. Thanks again
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Old 11-08-2012, 06:07 PM   #6
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Quote:
Originally Posted by 05PandaSti View Post
Thanks a ton guys! Very helpful. Haha yeah I found the kengilbert site after I posted this. Doesn't explain shims as well as you all did though. Thanks again
You're welcome! I was also confused with how everyone else was doing it my way just seem's way easier to learn.

If you look on cosworth site you can get the list of bucket size/part numbers. That's how I did mine. And I used the chart but in my own way to simplify it.
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Old 11-08-2012, 06:52 PM   #7
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And if you really don't feel like screwing around with shims/buckets, you can do what I did. Once I got my motor assembled, I loaded up the motor and dropped it off at the Subaru stealership and one of their techs did mine for ~$200. I even had to buy about 7 shims. I was pretty short on time at that stage of the build anyway so it was worth it to me.
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Old 11-08-2012, 06:59 PM   #8
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Quote:
Originally Posted by spoolinsti05 View Post
Sizing buckets/tipping valves is easy math. I'd recommend you not tip the valves and just spring for the buckets It's easier.

under the bucket you will find a number ex: 400

that mean it's taking up 4.00mm

.5mm = .001 thousandths

you need to add or subtract usually subtract if your cams have a decent ramp rate.

sometimes you can mis match a few bucket's

so say your bucket is 410 (4.10mm) and you measure .006 on your feeler gauge. and your cam card call's for .008 you need to subtract .5mm to get .001 extra clearance giving you a bucket of 405 (4.05mm) Are you paying attention?

If so you'd notice You need to take out .10mm to get a .008 total clearance.

Make sure you Tq to spec in Seq and use plenty of oil on the feeler gauge. Lobes need to be pointing up inline with bucket. If you never used a feeler gauge the proper way to check clearance is to check and check over and over. You think it's right huh? go check it again! You don't want the gauge to bind rather glide with little resistance!

Think about it like setting drag on drum brakes!

I take donations LOL
Wow, simply wow, people charge butt loads for someone to teach them stuff like this, great job!!!

-Mark
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Old 11-09-2012, 03:50 AM   #9
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Quote:
Originally Posted by APM Racing View Post
Wow, simply wow, people charge butt loads for someone to teach them stuff like this, great job!!!

-Mark
Thanks, this is just basic valve clearance and understanding math honestly. I was also around car's since a kid and asked a lot of questions. Everyone use to ask me are you writing a book? I would respond yes in my head they would say leave that chapter out and I'd replay well then that's not a book Truth be told I was always into it just didn't realize how much until I got my STi.

Anyone can figure this stuff out "It's not rocket science" all the info is out there if you can't find it on here you may find something like it using google, bing, honda-tech, evom ext.. With the exception of engine clearances that is subaru specific!

Last edited by spoolinsti05; 11-09-2012 at 03:57 AM.
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Old 11-09-2012, 11:58 AM   #10
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There needs to be more info about this in the sticky!!!! You should put together a post and we'll get it in the stickies!!! Thanks again!!
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Old 11-09-2012, 08:27 PM   #11
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Quote:
Originally Posted by 05PandaSti View Post
There needs to be more info about this in the sticky!!!! You should put together a post and we'll get it in the stickies!!! Thanks again!!
Sorry guy's I just noticed a typo.

.1mm = .001

I had .5mm that would be a little bit much LOL I edited my post so that one's good for use. Or you can link me to the thread and we can add it there.

Basically to simplify this thread we should have it all broken down into sections.

Last edited by spoolinsti05; 11-10-2012 at 05:58 PM.
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Old 11-09-2012, 10:37 PM   #12
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Good stuff Spoolin... Nice to see it broken down like that.
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Old 11-10-2012, 02:42 AM   #13
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Originally Posted by rexworx View Post
Good stuff Spoolin... Nice to see it broken down like that.
Thank's, Cosworth and FSW can get confusing. So I brought this to the table for us DIY guy's. It's more of a money thing then a PITA honestly but compared to and evo lol way easier in an evo.

This is probably what stops most of you guy's from biting the bullet on cam's So I only hope to see more of that with this info provided! Stock cam's are boring.
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Old 11-10-2012, 08:06 AM   #14
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Warning to All people using ARP stud's lube! Please read. This industry is a cluster duck anyone else noticing this chit?

http://speedtalk.com/forum/viewtopic...983cc&start=15
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Old 11-10-2012, 10:24 AM   #15
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Quote:
Originally Posted by spoolinsti05 View Post

.05mm = .001 thousandths



so say your bucket is 410 (4.10mm) and you measure .006 on your feeler gauge. and your cam card call's for .008 you need to subtract .5mm to get .001 extra clearance giving you a bucket of 405 (4.05mm) Are you paying attention?

If so you'd notice You need to take out .10mm to get a .008 total clearance.


I think you made few other mistakes in math, here I fixed that sentence for you. Atleast I think Im correct

so say your bucket is 410 (4.10mm) and you measure .006 on your feeler gauge. and your cam card call's for .008 you need to subtract .1mm to get .002 extra clearance giving you a bucket of 400 (4.00mm) Are you paying attention?
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Old 11-10-2012, 10:42 AM   #16
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Here is bucket thickness with part numbers for anyone who needs them


Part No.
Thickness mm (in)

13228 AB102
4.68 (0.1843)

13228 AB112
4.69 (0.1846)

13228 AB122
4.70 (0.1850)

13228 AB132
4.71 (0.1854)

13228 AB142
4.72 (0.1858)

13228 AB152
4.73 (0.1862)

13228 AB162
4.74 (0.1866)

13228 AB172
4.75 (0.1870)

13228 AB182
4.76 (0.1874)

13228 AB192
4.77 (0.1878)

13228 AB202
4.78 (0.1882)

13228 AB212
4.79 (0.1886)

13228 AB222
4.80 (0.1890)

13228 AB232
4.81 (0.1894)

13228 AB242
4.82 (0.1898)

13228 AB252
4.83 (0.1902)

13228 AB262
4.84 (0.1906)

13228 AB272
4.85 (0.1909)

13228 AB282
4.86 (0.1913)

13228 AB292
4.87 (0.1917)

13228 AB302
4.88 (0.1921)

13228 AB312
4.89 (0.1925)

13228 AB322
4.90 (0.1929)

13228 AB332
4.91 (0.1933)

13228 AB342
4.92 (0.1937)

13228 AB352
4.93 (0.1941)

13228 AB362
4.94 (0.1945)

13228 AB372
4.95 (0.1949)

13228 AB382
4.96 (0.1953)

13228 AB392
4.97 (0.1957)

13228 AB402
4.98 (0.1961)

13228 AB412
4.99 (0.1965)

13228 AB422
5.00 (0.1969)

13228 AB432
5.01 (0.1972)

13228 AB442
5.02 (0.1976)

13228 AB452
5.03 (0.1980)

13228 AB462
5.04 (0.1984)

13228 AB472
5.05 (0.1988)

13228 AB482
5.06 (0.1992)

13228 AB492
5.07 (0.1996)

13228 AB502
5.08 (0.2000)

13228 AB512
5.09 (0.2004)

13228 AB522
5.10 (0.2008)

13228 AB532
5.11 (0.2012)

13228 AB542
5.12 (0.2016)

13228 AB552
5.13 (0.2020)

13228 AB562
5.14 (0.2024)

13228 AB572
5.15 (0.2028)

13228 AB582
5.16 (0.2031)

13228 AB592
5.17 (0.2035)

13228 AB602
5.18 (0.2039)

13228 AB612
5.19 (0.2043)

13228 AB622
5.20 (0.2047)

13228 AB632
5.21 (0.2051)

13228 AB642
5.22 (0.2055)

13228 AB652
5.23 (0.2059)

13228 AB662
5.24 (0.2063)

13228 AB672
5.25 (0.2067)

13228 AB682
5.26 (0.2071)

13228 AB692
5.27 (0.2075)

13228 AB702
4.38 (0.1724)

13228 AB712
4.40 (0.1732)

13228 AB722
4.42 (0.1740)

13228 AB732
4.44 (0.1748)

13228 AB742
4.46 (0.1756)

13228 AB752
4.48 (0.1764)

13228 AB762
4.50 (0.1771)

13228 AB772
4.52 (0.1780)

13228 AB782
4.54 (0.1787)

13228 AB792
4.56 (0.1795)

13228 AB802
4.58 (0.1803)

13228 AB812
4.60 (0.1811)

13228 AB822
4.62 (0.1819)

13228 AB832
4.64 (0.1827)

13228 AB842
4.66 (0.1835)

13228 AB852
5.29 (0.2083)

13228 AB862
5.31 (0.2091)

13228 AB872
5.33 (0.2098)

13228 AB882
5.35 (0.2106)

13228 AB892
5.37 (0.2114)

13228 AB902
5.39 (0.2122)

13228 AB912
5.41 (0.2123)

13228 AB922
5.43 (0.2138)

13228 AB932
5.45 (0.2146)

13228 AB942
5.47 (0.2154)

13228 AB952
5.49 (0.2161)

13228 AB962
5.51 (0.2169)

13228 AB972
5.53 (0.2177)

13228 AB982
5.55 (0.2185)

13228 AB992
5.57 (0.2193)

13228 AC002
5.59 (0.2201)

13228 AC012
5.61 (0.2209)

13228 AC022
5.63 (0.2217)

13228 AC032
5.65 (0.2224)
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Old 11-10-2012, 05:36 PM   #17
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****LETS GET THIS IN THE STICKIES!!!****

::cough,cough-- mods ::
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Old 11-10-2012, 05:52 PM   #18
spoolinsti05
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Quote:
Originally Posted by bswilmington View Post
I think you made few other mistakes in math, here I fixed that sentence for you. Atleast I think Im correct

so say your bucket is 410 (4.10mm) and you measure .006 on your feeler gauge. and your cam card call's for .008 you need to subtract .1mm to get .002 extra clearance giving you a bucket of 400 (4.00mm) Are you paying attention?

You are correct sir! I'm sorry guy's but this may also be valuable lesson here. Always question your info when building an engine!

I probably would have wrote the correct math if I had my clearance sheet in front of me but that went into the garbage when I finished.

*Just remember to check your clearance after always*!
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Old 11-11-2012, 09:30 AM   #19
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I have a little box full of buckets for swapping back and forth. They do wear a little so always measure. This is why i have brand new buckets in sizes 469, 479, 489, 499, & 509 for measuring.
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