MikeB
Full Access Member
- Joined
- Apr 4, 2014
- Posts
- 1,749
- Reaction score
- 937
- Location
- North Texas
- First Name
- Mike
- Truck Year
- 1969
- Truck Model
- C10
- Engine Size
- 355
Not sure if this is your problem, but I once had some old heads that would leak oil down the valve stems after the engine sat for a while, which caused a few seconds of exhaust smoke on startup. After that, no smoke at all. These were earlier model heads with no oil control except for o-rings under the retainers, some of which had been pinched. So I simply added these "umbrella" seals that ride up and down on the valve stems. Problem solved. However, if you're fouling plugs, your problem could be more serious.
https://www.summitracing.com/parts/cca-502-16
You can probably get the Sealed Power or Fel-Pro versions at NAPA or other parts stores.
***By the way, low cranking pressure can be caused by an aftermarket cam that closes the intake valve a lot later than a stock cam. Not sure that's the reason for your low pressure, but it is why a big cam needs more static compression, and will typically do more harm than good in a low compression engine, like the GM Goodwrench 350.
https://www.summitracing.com/parts/cca-502-16
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You can probably get the Sealed Power or Fel-Pro versions at NAPA or other parts stores.
***By the way, low cranking pressure can be caused by an aftermarket cam that closes the intake valve a lot later than a stock cam. Not sure that's the reason for your low pressure, but it is why a big cam needs more static compression, and will typically do more harm than good in a low compression engine, like the GM Goodwrench 350.
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