 Valve problem, This time I think I'm screwed |
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| fitzm1 |
 Apr 23 2009, 11:57 AM
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#1
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Member  Group: Members Posts: 74 Joined: 21-April 08 From: Ballston lake,ny Member No.: 8,947 Region Association: None  |
Just finished all the work I had planned for this spring. Bump steer kit, CB fuel pump and cleaned (rebuilt ) the carb that has been giving me problems. Seemed to be running great. As I am going up a hill near home I hear a pop and the engine sounds like a sewing machine. First I thought I had lost a gear in the tranny but that seems fine. I checked the compression and all cylinders are 120. Car starts fine but sounds like one or more of the valves are real loud. Any explanation besides the one I fear (trashed motor).
Joe I think I broke your motor. Mike |
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| Dave_Darling |
Apr 25 2009, 11:17 PM
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914 Idiot Group: Members Posts: 15,161 Joined: 9-January 03 From: Silicon Valley / Kailua-Kona Member No.: 121 Region Association: Northern California 
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When one of my valve seats did that, it was deformed enough that I had essentially zero compression on that cylinder.
I'm still thinking it's an exhaust leak or something similar, not an internal engine problem. --DD |
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| fitzm1 |
Apr 26 2009, 04:40 PM
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#3
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Member Group: Members Posts: 74 Joined: 21-April 08 From: Ballston lake,ny Member No.: 8,947 Region Association: None |
 QUOTE(Dave_Darling @ Apr 25 2009, 09:17 PM)  When one of my valve seats did that, it was deformed enough that I had essentially zero compression on that cylinder. I'm still thinking it's an exhaust leak or something similar, not an internal engine problem. --DD Pulled the HEs today (This could get addictive). It looks like theres blow by on 1,3,4. The studs seemed to be tight but the copper gaskets are black. Could this amount of leakage cause the valve lash to sound so loud? |
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Posts in this topic
fitzm1 Valve problem Apr 23 2009, 11:57 AM
underthetire Mine did the same thing yesterday. Ended up a head... Apr 23 2009, 12:34 PM Elliot Cannon Collapsed lifter??? :confused: Apr 23 2009, 12:49 PM Scott Schroeder What motor are you running? I had something very s... Apr 23 2009, 12:51 PM Cupomeat Ok, so if all the cylinders have even compression ... Apr 23 2009, 12:55 PM
fitzm1 Pulling the valve covers and checking the valves i... Apr 23 2009, 01:14 PM SGB plugs in tight?
if an exhaust stud pulled out, th... Apr 23 2009, 08:39 PM fitzm1 Plugs were in tight. I just checked the valve cle... Apr 24 2009, 02:22 PM kwales Coupla options.
Check the exhaust studs to see if... Apr 24 2009, 09:29 PM r_towle Take the valve covers off, jack up the passenger s... Apr 24 2009, 09:51 PM euro911 ... Either way. stop running the motor..just turn... Apr 24 2009, 10:45 PM fitzm1 I have the car up on stands. I have checked the v... Apr 25 2009, 09:16 AM Bartlett 914
Is it possible that a valve could drop but snap... Apr 26 2009, 10:13 AM fitzm1
Is it possible that a valve could drop but sna... Apr 26 2009, 12:20 PM fitzm1
When one of my valve seats did that, it was defor... Apr 26 2009, 04:35 PM euro911 I helped a guy remove a leaking exhaust to find th... Apr 26 2009, 06:40 PM |
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