Broken valve spring cylnder #4, Broken valve spring cylnder #4 |
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Broken valve spring cylnder #4, Broken valve spring cylnder #4 |
vcolper |
Apr 13 2020, 09:35 AM
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#1
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Newbie Group: Members Posts: 2 Joined: 2-February 19 From: Florida Member No.: 22,853 Region Association: South East States |
Question:
Can I replace a broken valve spring (Cyl 4) while engine is mounted in car? What tool? Recommendations? Thanks |
ClayPerrine |
Apr 13 2020, 11:56 AM
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#2
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Life's been good to me so far..... Group: Admin Posts: 15,520 Joined: 11-September 03 From: Hurst, TX. Member No.: 1,143 Region Association: NineFourteenerVille |
I have replaced valve springs on lots of engines with the engine assembled and in the car.
1. Make a tool that hooks to the rocker shaft to depress the spring. 2. Remove the rockers on both intake and exhaust valves on the cylinder that needs the spring changed. 3. Put your tool on the engine, and pressurize the cylinder with about 100 psi of compressed air. 4. Push down the spring and remove the keepers. 5. Carefully remove the tool and replace the spring. 6. Push the new spring down with the tool and reinstall the valve keepers. 7. Disconnect the air, and reinstall the rest of the parts you removed. 100PSI will hold the valve in the head. I know it works, I have replaced lots of valve stem seals, and springs that way. In fact, the type IV horizontally opposed engine makes it easier. If you lose air pressure, the valve won't fall into the cylinder. |
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