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> Broken valve spring cylnder #4, Broken valve spring cylnder #4
vcolper
post Apr 13 2020, 09:35 AM
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Question:
Can I replace a broken valve spring (Cyl 4) while engine is mounted in car?
What tool?

Recommendations?

Thanks
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ClayPerrine
post Apr 13 2020, 11:56 AM
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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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vcolper   Broken valve spring cylnder #4   Apr 13 2020, 09:35 AM
Jonathan Livesay   No. Unless you want to try to remove the cylinder ...   Apr 13 2020, 10:05 AM
brant   I've done it. you can build a tool that rocks...   Apr 13 2020, 10:21 AM
Jack Standz   I've done it. you can build a tool that rock...   Apr 13 2020, 10:59 AM
Jonathan Livesay   I've done it. you can build a tool that roc...   Apr 13 2020, 11:22 AM
crash914   you can always do the rope trick.. Fill the cylind...   Apr 13 2020, 11:39 AM
ClayPerrine   I have replaced valve springs on lots of engines w...   Apr 13 2020, 11:56 AM
bretth   I replaced valve seals on my old V8 Dodge years ag...   Apr 13 2020, 12:24 PM
Jack Standz   Question: Can I replace a broken valve spring (Cy...   Apr 13 2020, 02:37 PM
Mark Henry   Question: Can I replace a broken valve spring (C...   Apr 15 2020, 01:04 PM
vcolper   Hello, First of all I want to thank you all for ...   Apr 15 2020, 09:34 AM
gtbarnes   Hello, First of all I want to thank you all for...   Jun 3 2020, 11:17 PM
gtbarnes   Hello, First of all I want to thank you all for...   Jun 6 2020, 12:24 AM
HAM Inc   Over the twenty plus years I worked with used T4 h...   Apr 15 2020, 04:04 PM
gtbarnes   Over the twenty plus years I worked with used T4 ...   Jun 4 2020, 05:43 PM
pilothyer   You are 1000% correct on ALL of that...Now the qu...   Jun 4 2020, 06:10 PM
gtbarnes   You are 1000% correct on ALL of that...Now the q...   Jun 6 2020, 12:06 AM
gtbarnes   You are 1000% correct on ALL of that...Now the q...   Jun 6 2020, 12:13 PM
maf914   Webcam has type 4 spring sets: http://www.webcams...   Jun 5 2020, 09:36 AM
gtbarnes   Webcam has type 4 spring sets: http://www.webcam...   Jun 6 2020, 12:15 AM


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