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McMichem
Joined: 26 Jun 2015 Posts: 38 Location: Buffalo NY
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Posted: Thu Mar 03, 2016 7:09 am Post subject: Possible to bend valve by hand?... |
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I was doing my water pump,timing belt and vacuum lines on my 931.
I was trying to set timing based on my flywheel marks and not the little chisel mark on the oil pump pulley because I thought it would be more accurate. Apparently the flywheel was not put back in the same orientation because the marks were off, I ended up trying to crank the cam pulley with the oil pulley set at the "correct" mark and apparently cranked pretty hard pushing the valves into the Pistons because the marks were off and thought I was fighting compression.
Few questions for you guys as I finally have some money to get this car going.
1. Is it possible to bend a valve by force like I unfortunately did? No breaker bar was used, just the ratchet and socket.
2. If I did bend a valve and need to have that fixed. I plan on going through ideolas site for the valves, should I have the rings done while I have the head off?
-what type of price should I expect for labor for valves and rings?
-anything else I should check or have done with the head off besides rings and valves?
- I haven't done a compression test on my engine, but should I be able to spin the crank by hand with the plugs in (not easily)or would that suggest low compression?
I have $2000 total into my car right now with new timing belt, water pump, vacuum hoses and elbows done. So I'm gonna set a budget of $1500-$2000 for my car to get it back into decent condition. _________________ 1980 931 ~ 67,000 miles |
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Grenadiers
Joined: 20 Feb 2007 Posts: 3222 Location: Nelson, WI & Prescott, AZ
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Posted: Thu Mar 03, 2016 7:30 am Post subject: |
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Pull the plugs, and run a compression test, you'll find out very quickly! _________________ '83 944 Track car.
'88 924S Track car.
'89 944 Turbo
2004 Winnebago Vectra monster RV
2012 Jeep Wrangler
2014 Kia Soul
2001 Ford F350 powerstroke |
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jason c
Joined: 13 Jan 2014 Posts: 1018 Location: Nwi
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Posted: Thu Mar 03, 2016 11:06 am Post subject: |
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Grenadiers wrote: | Pull the plugs, and run a compression test, you'll find out very quickly! |
^^^^yep^^^^
It doesn't take much to damage a valve. If you used enough pressure to turn the engine over with compression, you used enough pressure to damage a valve.
What rings are you talking about, wire rings, as in "O-ringing" the head?
Whether you should do that depends . The boost you plan to run and the head gasket you plan to use.
Cost can vary widely, labor on having a valve job done on the head will probably be around $150. It depends on where you take it. I've had it done for as little as $40 when I did the tear down,cleaning & assembly myself.
Certainly have the head checked for straightness while its apart. |
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Rasta Monsta
Joined: 12 Jul 2006 Posts: 11723 Location: PacNW
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Posted: Thu Mar 03, 2016 11:44 am Post subject: |
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Normal sized guy, normal sized ratchet, medium effort? I doubt you damaged anything. _________________ Toofah King Bad
- WeiBe (1987 924S 2.5t) - 931 S3
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