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#1
06-01-2011, 12:10 AM
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65 GP motor turns so far then stops
I'm new to the PY forums. I bought this 65 GP with a 389. Its been sitting since 1974. I had the motor turning over trying to get it to start. Then late yesturday it stopped turning. Went out and messed around with it and got it turn over,but it turns so far one way then stops. Turns back and stops. So any ideas? My guess its something to do with the valve train. Thanks
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#2
06-01-2011, 12:43 AM
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Is there a clunk when it stops turning? How far can you turn it before it stops? 1/4,1/2,full turn, almost two?
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Why is he not suspended? |
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#3
06-01-2011, 01:13 AM
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Sitting a long time, I'm thinking a valve stuck open. Piston hitting it.
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Keith Collier 61-63 Pontiac Tempest Tech advisor POCI.org |
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#4
06-01-2011, 01:15 AM
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Quote:
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Why is he not suspended? |
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#5
06-01-2011, 01:51 AM
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I had this happen once, took the heads off and one cylinder had rust in it all the other cylinders were fine. No matter what i would pull the heads as have a look, cant hurt.
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#6
06-01-2011, 02:31 AM
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or rust build up on a cylinder wall, but forcing it to crank over might breake rings
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#7
06-01-2011, 07:29 AM
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It was turning over all day long. Now it turns over more then half. There is alot of sludge under the valve covers. I know I need to tear the motor apart,but right now I want to get it running enough to get it off the street. The car only has 70000 miles but PO didnt take good care of it. On another thought weres a good place to get a ignition lock cylinder with keys? Thanks for all the help.
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#8
06-01-2011, 07:39 PM
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Motor turns over only 180 degree's. I dont think its the valves. Going to pull the fuel pump.
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#9
06-01-2011, 09:04 PM
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Regarding ignition : Check with our host Performance Years.
Jim
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65 Catalina sedan. Allen Thomas Performance 495. KRE Heads at 310cfm ported by SD Performance, ProSystems Dominator carb on ported Victor intake, P-Dude custom grind hydraulic roller, MSD ignition, 3.50 Moser/Ford rear. F-Glass front bumper by son Rob, rear by the old man and joint effort for trunk lid. 3950# w/driver. Best of 9.5761/139 on 175 shot, 6.01 /114 in 1/8. |
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#10
06-01-2011, 10:14 PM
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I pulled the intake and the fuel pump. I'll check the lifters tomorrow. All the rocker arms seem to be the same. Still could be a valve I guess. Motor stops when #5 and #8 piston are at the top. Noticed loose debris in #5 spark plug hole. Looked in the fuel pump hole at the timing chain looked ok. Most likely going to pull the heads. Like Pontirag and chubiw1 suggested.
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#11
06-05-2011, 10:37 AM
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Found the problem. Carbon crud in the #5 cylinder. I dont think this motor has been rebuilt. The cylinders look good. What can I put in the gas since it most likely it doesnt have hardened valve seats?
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#12
06-05-2011, 11:12 AM
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Years ago bought a SBC hauled it home in the back of a truck-a little sleet falling. Next day turned it over same deal stopped one way , then the other way.Thought got a bum motor.Pulled the head and some freezing rain had gotten in the cylinder and frozen hard!
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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