Just in case you didn't see the heartattack my engine had in my other post here it is. I guess that's what 100k miles and added turbo kit do to your valves




I definately am going to buy new valves this time around but I need some shopping advice. Will I need an oversized valve? I'm assuming it something like an oversized piston to compensate for that messed up valve seat or something would be a good idea to get it oversized?

Springs? My springs have never failed me (knock on wood) should I buy a new set of stock springs too? I'm looking at those what was it crane or crower or something stiffer springs. You really only need those if your going past like 7000 RPM? I don't plan on bringing it that high all the time. Will I be fine with a set of new stock springs or should I replace them at all?

Same thing for rockers and lifter do I really have to replace them or not?

http://www.hadesomega.info -car specz and movies 95 Eclipse RS | 76' 280Z | 89' MR2 | 99 Neon | 91 Zephyr
Who sez FF can't drift?

You could get oversized valves, but you would have to have the seats cut bigger to accomodate them. Oversized valves are for flowing more air, at least that is the most relevant part of our discussion, you don't need oversized valves for a valve job. Unlike pistons, which need to be the appropriate size (.010, .020, etc.) to fit a bored engine (which ought to be done on most engine rebuilds), the valve seats are just cut 'down' not 'out' and in such maintain their original size. Now having said that, if you are going to have your valves cut anyways, and you are buying new valves anyways (at least get stainless) and the cost difference at the shop and parts house is similiar, then you might as well put in bigger valves so you can say "1mm oversized valves sucka!" or something to that effect.

I see no reason not to get some Crane or Crower springs (I don't know which one people have had better luck with) if for no other reason than they will give the piece of mind that if you miss a shift or otherwise over rev, you won't float a valve and run the risk of a Piston vs. Valve battle royal. And if ever you want to upgrade your cams from stock then you already have the springs for it and thus won't have to change them on the car (a bitch).

As for the lifters, umm, sure! Go ahead and change them out for PT Cruiser lifters, everyone seems to like them. At 100,000 miles if you are going to do your head, you might as well get all new stuff. Good luck on it, shouldn't hurt too much (financially speaking)

Representing the Central Cali chapter of 2GNT!
(I think I'm the only member )

M,
I say rebuild the whole thing with SS valves, and related new parts. That way no more worries.

-K-

SI SSvalves 1mm over
http://catalog.exileracing.com/product_info.php?cPath=215_248_223&products_id=322&osCsid=292fb5f1966d7bbcb22bee82657fa30c

~Luke
Facebook
1969 Cougar - 11.91 - 380HP
2007 GSXR 750
1999 OZ - SOLD - 15.26 NA - 14.71 on 75 shot

The SS, 1mm oversized valves from ERT, Crower springs, Crower Ti retainers, PTC lifters/lash adjusters, and a 5 angle. It's peace of mind Hades. You're boosting, I'd think you could really make the most of the oversized valves. You don't need to have the Titanium retainers, but the springs, valves and hardware pretty much bullet-proof your valvetrain. You don't want to go through this again, do you? Do it up right and reap the rewards!


I know it might hurt a bit in the wallet up front, but believe me, the first time you wind her out to redline afterwards you will be glad you did.

Just my two cents.

EDIT:
Another picture of the valves from below. Sorry they're so dirty.

hahn ran a 10.9 on an otherwise stock head...

so i think the stock valves are just fine

unless you're a baller and want to spend gobs of cash on shiny stuff

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

I agree whole-heartedly with DR1665. His post helps further elevate my point. Spend the extra cash and have shit done right. Big reassurance factor there.

No offense to turby but its not about who ran what, its about what YOU as a person want on YOUR car. I do understand your point though. I can only imagine what Hahn would run after uprgrading stock components and porting out a head.


http://www.dsmregistry.com/detail.php?carid=1030

my point is that if the shoe fits, wear it. its sonsiderably cheaper to rebuild a stock head than it is to build one with "better" parts

SS valves are nice though friend of mine has an extremely ported head and 2mm oversized and his car screams like a bitch slut

good luck

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

.........................................................................................................................

Built. That's All...
.........................................................................................................................
www.monkeybuttpirate.com
.........................................................................................................................
2 Fingers of Scotch with a milk back... Stat!

yeah I can understand what you guys are saying about should I replace it or not. Its like gambling whether the part will fail later on haha and in this case I lost after 5k miles.

Anyway I'm gonna go ahead and replace everything just because its got highmileage, this thing better not have to be opened up again >.<

I'm gonna get new valve seals and guides while I'm at it too I had this oil burning problem that I thought I fixed with replacing the seals a year ago so this sucka better go 3000 miles with not burnt oil.

Now the rockers I haven't heard anyone say anything about those. Howell sells these SBI rockers that they say are PT style or something. Will those be a good idea to get also I know I've heard of some people cracking theirs. Then again I look at the rocker picture and it doesn't look much different than mine O_o

oh oh oh I know I'm long winded haha but will having oversized valves affect my emissions at all? Hopefully get better emissions O_o I want my car to pass smog

http://www.hadesomega.info -car specz and movies 95 Eclipse RS | 76' 280Z | 89' MR2 | 99 Neon | 91 Zephyr
Who sez FF can't drift?

i just found a full on PT head on ebay for 50$ and swapped the rockers and lifters

the rockers look the same yea, but i *think* the pt's are hardened? im not sure...but my valvetrain got considerably quieter with the pt parts

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

I had the same exact damage in my 1G. Replaced my valves with oem valves, and new valve stem seals. Still running perfectly.

When a 420a head is only $50-100, it really doesnt pay to upgrade it for just a daily driven car.

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com

where did you get head for $50?

-marc

_ _ _ _ _ _ _ _ _

96 Black ESi
91 Red TSI AWD (RIP)
02 WRX


"turnin wrenches for nine hours in the pouring rain, just to get the beast up and running again"

Aerospace Certified TIG welder for Precision Castparts in Portland, OR.

JoshSpair.com