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Old 01-16-2018, 05:20 PM   #1
LutzCoyote
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Default 304 Vacuum or other problem

Fellow IH Members,

I have 72 Scout with the 304 engine. I've noticed lately I'm starting to see some oil around the EGR Cap Plate, Spark Resistor port. below the Drivers side Valve Cover and behind the Valley Pan on the tranny tunnel below where the PVC valve is located.

My question is could a Vacuum issue be causing the odd leak locations of is it just valve Cover and manifold gaskets that need replacing or something else all together?

I'd appreciate any and all assistance.

LutzCoyote
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Old 01-16-2018, 10:01 PM   #2
FDChappie
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Default Re: 304 Vacuum or other problem

If the valve gaskets are over 5 years old, I'd start by replacing them.
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Old 01-17-2018, 08:43 AM   #3
Scoutboy74
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Default Re: 304 Vacuum or other problem

Have you verified function of your PCV and EGR valves? There could be excess pressure building up inside the crankcase looking for easy places to escape...aka blow-by. How many miles on this engine? Have you tested compression lately?
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Old 01-17-2018, 02:00 PM   #4
FDChappie
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Default Re: 304 Vacuum or other problem

Agreed ScoutBoy, I had a 345 blowing oil out of the dipstick under load because the PCV and Flame Arrester were plugged.
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1972 Loadstar 1700 dump truck 345 T-35
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Old 01-21-2018, 01:23 PM   #5
LutzCoyote
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Default Re: 304 Vacuum or other problem

Scout. I haven't and that's a great suggestion, I'll update once I check.
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Old 01-21-2018, 01:25 PM   #6
LutzCoyote
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Default Re: 304 Vacuum or other problem

I'll check the spark arresttor also..Do you know where I can get a replacement?
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Old 01-21-2018, 04:36 PM   #7
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Default Re: 304 Vacuum or other problem

soak it with carb cleaner until it runs out clean. It is just a copper mesh screen in side.
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