Oil in intake ports

doug.nichols

doug.nichols

Senior Member
I am taking parts of my existing engine in preparation for the delivery of a new long block. Babbitt bearings took a poop. In removing the manifolds, I noticed oil in the intake ports. What might that be indicative of? Picture attached.
 

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My guess came up around valve stems, looks like exhaust ports pretty clean & even burn. New motor will clear that up. Edit: good valve fit should stop crankcase being sucked on
 
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Could be just fuel residue if the last time it was run, it was turned off before it got thoroughly warmed up. Fuel these days is nothing like the fuel they used in 1930.
 
hi doug.nichols i have an unrelated question.
i see you have the full flow oil filter, how clean is the bottom of the side oil gallery by the lifters? has the filter done a good job filtering the oil?
ou
 
Old Ugly,

I'm not asked, but maybe my hint about the oil filter will help you a little? I had the oil filter cartridge opened and squeezed out in an aerospace maintenance company using a special chipless filter cutter.

The trapped dirt was rinsed out and examined for metal chips and hard carbon residues, etc.

What you can see here was after about 2000 miles with my previously overhauled engine.
 

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i have one on my car that i just installed, the engine was clean inside before i put it on. just curious about its affect.
what brand of filter did you use. not that that matters much as any filter is better than none.
ou
 
old ugly said:
... what brand of filter did you use.
ou
Click to expand...
ou, I use a litle filter named " MANN 77-2 ". It is not too finely meshed, so that even thick-tough oil is pumped into the valve chambers during cold starts. It also has a high bypass back pressure so that this pressure relief valve opens as late as possible.
 

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I have a Model T engine that I just pulled down with the same issue, but in my case, one of the spring keeper pins had gone missing, so one of the intake valves was floating allowing oil to be pulled up along the stem. When you do pull the side cover, check for weak or broken spring on 1 and 2 cylinders intake springs.
 
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