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Post by spiked3cylinder on Dec 3, 2009 19:00:53 GMT -5
Hello Justyers!
After finding nothing through searching this site, I've decided to begin a thread, in hopes of a solid answer.
How difficult is it to check the clearance and lashing of our beloved valves within our 1.2 liters of glory?? Anything important I must know??
This seems to be something that most people often forget about. To me, it seems like a very important component within the engine - I'm always getting my valves checked on the motos....
Please let me know anything and everything regarding this project.
Thank you, Adam
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Post by Quidam on Dec 3, 2009 20:46:47 GMT -5
Hi,
"How difficult is it to check the clearance and lashing of our beloved valves within our 1.2 liters of glory?? Anything important I must know??"
It's been a while since I've done it, and I'm not so sure just anyone can pull it off.
What works for me is that I got a set of taper feeler gauges and bent them to about a 45 degree angle. It's easier for me and I remove them from the rest of the gauges. By tapered, I mean...
One goes from .004 to .006 in thickness. The nominal cold value is .0059. for the intake.
Another goes from.008 to .010 in thickness. The nominal cold value is .0098.
I'd really like to get my hands on a Subaru VALVE CLEARANCE ADJUSTER pn 498767000, or something like it for the next time.
If I get them too loose, I may hear some chatter/clatter from them. If I get them too tight, I'll loose power/compression, might burn a valve too. Nominal cold intake clearance= .0059 Exhaust= .0098 .0051 - .0067. Intake .0091 - .0106 Exhaust
is the factory range. I set them at .006 and .010. and next time I do it, I think I'll do a better job.
Set #1 at TDC compression. do that one, rotate to #3, do that one, rotate to #2 TDC compression, do that one.
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Post by Quidam on Dec 3, 2009 21:00:47 GMT -5
This left an impression on me long time ago.
I'm watching a guy run (adjust) the valves on a Sprint Car in the pits, between laps qualifying.
He had the rear wheels off the ground, the cars are direct drive, no transmission. It's in or out.
He pops the rocker boxs off from it and sets it on TDC #1 compression. He runs the feeler gague between the rocker arm and valve tip, while rolling the motor back and forth from TDC...
With His Foot on the rear tire.
He watches the rocker arms and goes on to #8. Firing order is 18436572. Then rolls it around to #4, so on and so forth. While a thick clay dust was in the air. Three eights mile dirt short track.
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Post by jintei on Dec 4, 2009 2:05:44 GMT -5
.......good old V8 General Motors firing order the simple method is to simply free the handbrake, set the gearbox in 5th, and push the car a bit to open and close the valves, the car weighs nothing, but can also lift a wheel with the jack and spin it. when the valves on a cylinder are closed shake the rocker while tightening it until it stops sounding cuz it just run out of play, then unscrew it a quarter of a turn and check if it gained back a bit of play. I posted this because some times i feel people with $400 cars are not likely to have such tools as impact wrenches, compressors or feeler gauges... the clacka-clacka noise on the valves is the last warning from the engine announcing " Hey!, i love to leak oil and you forgot!
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Post by spiked3cylinder on Dec 4, 2009 12:14:35 GMT -5
Any opinions on the importance of this? I have 138,000 miles on her...
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Post by streetruler on Dec 4, 2009 17:34:35 GMT -5
good maintenance to do. i do it about yearly on my cars or when they get loud
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Post by aberlin on Mar 23, 2017 9:35:10 GMT -5
Hello,
i know i'm resurrecting a dead one but does anyone know the hex size i need to do the adjustment? is it a 12mm?
i have limited tools and i'd like to have them all ready before popping the cover off.
i also don't plan to find and/or buy the subaru adjustment tool (498767000)
thanks,
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Post by austynn2001 on Mar 23, 2017 13:51:29 GMT -5
I'll check when I get home from work and let you know if someone hasn't already.
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Post by austynn2001 on Mar 23, 2017 19:42:50 GMT -5
12mm indeed. My first contribution to the forum. Woo! Lol
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Post by aberlin on Mar 23, 2017 20:59:57 GMT -5
awesome, thanks, and what about the inside?
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Post by austynn2001 on Mar 23, 2017 21:11:21 GMT -5
A little square head. If I were doing it it I'd probably use a small adjustable wrench.
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Post by madmatt on Mar 23, 2017 22:17:27 GMT -5
yep, little adjustable wrench or I think 9, maybe 8 mm wrench, or vice grips, or you fingers... teeth?
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