Circle Track Crate Engine Technical Manual - Chevrolet Performance
Circle Track Crate Engine Technical Manual - Chevrolet Performance
Circle Track Crate Engine Technical Manual - Chevrolet Performance
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Valve Spring Inspection Procedure<br />
This section helps identify those teams that have changed valve springs in an effort to gain<br />
additional rpm’s. It is important to keep rpm’s within GM recommended numbers. <strong>Engine</strong> life<br />
and wear is severely reduced for every 100 rpm’s that an engine is over-revved.<br />
Purpose<br />
Check for proper stock valve spring<br />
specifications. Use Moroso p/n 62390.<br />
Step 1. Have the crew chief remove all<br />
debris in and around the engine<br />
Step 2. Have the crew chief remove the<br />
valve cover being careful not to<br />
contaminate the cylinder head<br />
Step 3. Have the crew chief remove<br />
both rocker arms from the selected<br />
cylinder & make sure piston is at BDC.<br />
Step 4. Slide the Moroso valve spring<br />
tester into position so that intake valve<br />
spring sits in tester pocket<br />
Step 5. Pull the handle to compress the<br />
valve spring to full compression and<br />
note the reading. Repeat the test for<br />
the exhaust valve spring and note the<br />
reading<br />
Step 6. Refer to chart in rebuild<br />
section for correct valve spring<br />
pressures for the intake & exhaust.<br />
Use the space below to reference the<br />
numbers for your application.<br />
Int.________ Exh.________<br />
Page 34
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