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Old 09-26-2010, 12:56 PM   #1
edognight
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Default Bent Valve? or not? Idiot mechanic? YES!

I was putting my 1997 outback's ej25 back together, trying to rush thinking I was Mr Speedwrench and did tink the piston into the valve (or something). In fact I broke pretty much every rule about turning the engine over, etc. I acknowledge my mistake and save your "put down the wrench and walk away. you idiot" posts. I know I'm an idiot, let's work from here...

So I threw a wrench in anger and am much better now.

I turned over the motor with a ratchet on the pulley (with the valves closed this time) and measured the compression in the affected side. It measured 32 psi, in all cylinders and the pressure build up the same on all four. in fact once it jumped to 90 on one of the bad sides.

I'm going to measure the lash on all of the valves and if the compression is good, I think I'm safe. My thought process is: good compression and all the lash the same, no bent valve.

Or not. Any HELP would be appreciated! Thanks.
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Old 09-26-2010, 10:33 PM   #2
PhilSine
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All you can do is put it back together and see how it runs. I've touced valves with pistons lightly before and had no issues.
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Old 09-26-2010, 11:29 PM   #3
Storm
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^^^this....

You can also use a leakdown kit to see if you've got rushing air coming from the intake or exhaust. It's gonna take a pretty big oops to hand crank the motor enough to bend the valves. More than the typical "compression" feeling.

Jay
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Old 09-27-2010, 03:28 PM   #4
edognight
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Default Good advice

thanks guys. I'm gonna put it together and run it! I'll let you know how it goes...
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Old 09-27-2010, 03:37 PM   #5
RaineMan
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Quote:
Originally Posted by PhilSine View Post
All you can do is put it back together and see how it runs. I've touched valves with pistons lightly before and had no issues.
Yep. You can touch the valve without damaging it. Just hope you are lucky.
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Old 10-01-2010, 10:38 AM   #6
edognight
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Default a little update

So i got the motor in and it fired right up. It is not running smooth, and I am pretty sure it is off a tooth at least. IT RUNS rough, and has a chugging sucking air sound...

the problem is, there is a distinct tink...tink...tink...tink sound from the dangerous head side. Can a mistimed cam make a tink sound?

it sounds like a lifter sticking like the hydrolic ones that fill up with oil, then it goes away, but it won't go away.

I have heated the car up and it is definitely in the valve train, and constant with the RPM'S...very loud underside the car and on the left side.

Opinions appreciated!! It's my second car and I got it for cheap, so I don't mind messing with it...
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Old 10-01-2010, 11:42 AM   #7
PhilSine
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COuld be either of the situations you mentioned. Gotta pull the cover back off and check the timing. If it's lined up...you know the rest from there.

Also, when I do a timing job; I always fire up the engine before I put everything back on the front of it or re-install the radiator. This lets me know if everything is working in the valve train and engine so that if I do have to reset the timing then at least I don't have to tear everything back down again to do so. It potentially saves time if there's a minor error on my part.
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Old 10-02-2010, 08:35 AM   #8
edognight
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Default I hear ya!

I haven't put anything on the front either. I just don't have that much faith in my abilities...I guess the only problem is the batt doesn't charge. ho hum...
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Old 10-03-2010, 04:57 PM   #9
edognight
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Unhappy gOT it running, and tink, tink, tink

Timed up and running fine, no cel or check engine light...same tink tink tink from the driver's side head.

The other side makes a little noise, but this new noise, I just can't live with. Taking motor out and starting over with that side head.

It sounds like a lifter that's stuck, or a hydrolic lifter until it fills with oil...

I am going to bet it's a bent valve and take the head apart and see. I did score a drivers side head for .99 plus shipping, so things could be worse...

any guesses as to what makes a distinct tink tink tink? it sounds like someone is tapping the valve cover with a hammer. very loud and won't go away with a heating cycle or whatever...

I'll bet a bent valve...
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Old 10-03-2010, 05:36 PM   #10
181stLeader
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Have you compression tested it yet? You can get accurate results unless you crank the motor over with the starter. Turning it over with socket wrench wont cut it...
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Old 10-05-2010, 08:01 AM   #11
eppoh
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+1 on the compression test. Better yet, do a leak down check.

That tink sound could also be a loose bolt on the rocker shaft assembly. This happened to me when I re- assmebled my heads. One of the bolts worked itself loose and made a terrible racket after I started it. Pull the rocker box cover on that side and see if something is loose.
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Old 10-14-2010, 06:44 PM   #12
edognight
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Default Thanks for the advice guys!

I got an ebay used head for .99cents and stole some of the valves, and long story short, the car fires right up and runs like a dream. very smooth, like a new car! the tink sound was two bent exhaust valves and one intake.

So let that be a lesson to you kids! a tink sound from the head is not cool.

One last thing...the car runs perfectly, runs for five seconds and dies. I'm sure it is something with the vacuum or something I forgot to re-hook up...anytone have a history of this?

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Old 10-14-2010, 07:07 PM   #13
feint05
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yep check the vaccum hose on the bottom of the intake tubing
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Old 10-15-2010, 11:14 AM   #14
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Quote:
Originally Posted by edognight View Post
Timed up and running fine, no cel or check engine light...same tink tink tink from the driver's side head.

The other side makes a little noise, but this new noise, I just can't live with. Taking motor out and starting over with that side head.

It sounds like a lifter that's stuck, or a hydrolic lifter until it fills with oil...

I am going to bet it's a bent valve and take the head apart and see. I did score a drivers side head for .99 plus shipping, so things could be worse...

any guesses as to what makes a distinct tink tink tink? it sounds like someone is tapping the valve cover with a hammer. very loud and won't go away with a heating cycle or whatever...

I'll bet a bent valve...
that was exactly how I described my last failure. When I finally sold the block, the buyer found it was just a wrist pin lock that needed put back in....... this was shortly after redoing my heads & timing just as you have.
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Old 10-18-2010, 12:42 AM   #15
PhilSine
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Default

Quote:
Originally Posted by edognight View Post
I got an ebay used head for .99cents and stole some of the valves, and long story short, the car fires right up and runs like a dream. very smooth, like a new car! the tink sound was two bent exhaust valves and one intake.

So let that be a lesson to you kids! a tink sound from the head is not cool.

One last thing...the car runs perfectly, runs for five seconds and dies. I'm sure it is something with the vacuum or something I forgot to re-hook up...anytone have a history of this?

Fuel lines could be routed to the wrong nipples.
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Old 10-19-2010, 09:19 PM   #16
edognight
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Default I got it!

I got it running and everything is fine! one mental slip cost me .99 cent head on ebay plus shipping, and a new HG.

The tink tink tink sound was a bent valve in the head, and it was pretty easy to fix. All told, there were 2 intakes and one exhaust bent from hand cranking the piston into the valves. Not too bad, really. At least it wasn't running.

And the vacuum under the intake was off and it would start and run and then die. Thanks for the help guys. It was my first time in a subaru and with what I know now, i should be fine next time.
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