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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 02-14-2005, 12:32 PM   #1
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did a little valve cleaning today

and i don't mean with techron. those things were so crudded up it was nasty. but now my car is going to like me
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Old 02-14-2005, 12:34 PM   #2
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What prompted you to pull the head off your car? Did you blow a gasket? Time to get that head dipped and cleaned!
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Old 02-14-2005, 12:58 PM   #3
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I got to get on that too. Mine is probably just as bad being a '95...Any plans to "bore" it out, or are you just cleaning it up?
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Old 02-14-2005, 01:58 PM   #4
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My port/polish/valve job is almost done.

Can't wait to compare notes.
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Quote:
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- pretend you are watering delicate plants...
Quote:
Originally Posted by SAABseanSCANIA
can be prone to failure due to increased localized stresses in the hole penetrations
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Old 02-14-2005, 02:17 PM   #5
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you know, have you ever seen a head after it''s been dipped / re-surfaced and had a valve job? you would have a hard time telling it from new except for date codes.
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Old 02-14-2005, 02:27 PM   #6
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A fresh clean head is a pretty thing to see. I just dropped off the heads for my Buick for porting and polishing and good clean up.
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Old 02-14-2005, 02:32 PM   #7
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That Buick would be a WE-3,2, or 4 would it?
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- pretend you are watering delicate plants...
Quote:
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can be prone to failure due to increased localized stresses in the hole penetrations
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Old 02-14-2005, 02:35 PM   #8
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Quote:
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That Buick would be a WE-3,2, or 4 would it?
Nope it is a '68 Buick Le Sabre with a High Output 350 in it. It is just my old baby that is getting restored right now.
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Old 02-14-2005, 03:08 PM   #9
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I have a 302 I need to sell out of a 69 camaro, I think I need to buy a 383 stroker for the car. the 302 is worth about $4500 and I think I can get a good stroker for around $3000 so I should come out on top there.
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Old 02-14-2005, 05:25 PM   #10
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i have been taking it apart because i am replacing the head gasket etc. i am taking it to the machine shop tom. to get check, and i guess cleaned. i think i might have them replace the valve seals, i don't want to take that on myself. plus there was some oil in the #4 valve. curious...
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Old 02-14-2005, 05:51 PM   #11
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Quote from the WIS: "The valves are faced with stellite and should not, therefore, be machined."

Just be careful, and keep that in mind.
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Old 02-15-2005, 04:20 AM   #12
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Whats Stellite?
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Quote:
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- pretend you are watering delicate plants...
Quote:
Originally Posted by SAABseanSCANIA
can be prone to failure due to increased localized stresses in the hole penetrations
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Old 02-15-2005, 08:30 AM   #13
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in his Case...
"gone"


also Have the machine-shop check valve-guides.
they go too. Most DSM guys here, bake(clean), plane and replace valve-seals, but don't find out until too late that Their guides Are cracked, and leaking.

the seals aren't hard, but the valve-springs will kill you if you get in their trajectory path.


When I had to take the head off the Galant, it went in looking like total ass.
When I got it back, I felt bad filling it up with oil.
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Old 02-15-2005, 09:06 AM   #14
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is the missing stellite going to cause problems? i am taking it to the machine shop today to be checked, cleaned, replace valve seals because i don't want to take that on, and resurfaced if needed. any suggestions?
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Old 02-15-2005, 09:52 AM   #15
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I was just Raggin' on ya.

chances are, if you just used a wire-wheel.. you didn't do any damage....

however, the part you shoul dbe most-concerned with is the valve-seats.
that's what makes the Seal between the head And valve.
if it's all cruddy there, you won't build compression like you should.
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Old 02-16-2005, 02:07 PM   #16
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Quote:
Originally Posted by noxben
is the missing stellite going to cause problems? i am taking it to the machine shop today to be checked, cleaned, replace valve seals because i don't want to take that on, and resurfaced if needed. any suggestions?
The stellite is an anti-heat surface treatment. It's supposed to protect the metal. It'll probably be ok ... but the exhaust valves might not last as long as they ordinarily would have.

Adrian~
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Old 02-16-2005, 02:55 PM   #17
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Well the material they are cutting is from the back, so I'm alot less worried then.
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Quote:
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- pretend you are watering delicate plants...
Quote:
Originally Posted by SAABseanSCANIA
can be prone to failure due to increased localized stresses in the hole penetrations
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Old 02-16-2005, 03:26 PM   #18
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stellite coating is a lot like ceramic coating the valve tops... this is commonly done on top fuel cars (ceramic coating)
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Old 02-16-2005, 04:47 PM   #19
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This is the head on my 1776cc VW engine I was trying to fix over the summer..
I was real excited with the quality of my work on head # 1 I just used a Drill w/ a wire brush, and a Drimel tool for the cracks and creveses. Now take a closer look @ # 2 Head MMMMMM..... No wonder it wouldnt run for shit Amazingly that was not the cylinder that was full of rust haha!
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