1951 288 Tests before Removing Head

Posted by kunzea On 2023/5/3 12:19:04

The engine has noise while idling and increases proportionally with rate of acceleration accompanied by vibration. Little noise or vibration when throttle is released at speed in lockup. Using the stethoscope as shown, some of the valves have significant noise. Some are intake and some are exhaust. No. 7 has noise on both.

What testing should I perform in addition to:

1. Compression
2. Manifold Vacuum (below carburetor)
3. Noise location - valves (This consisted of use of stethoscope at top of valve spring as shown in photo.)

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