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<p>Don't know BN4s well, but isn't the rear filter the one with the
crankcase vent piped into it? That would be the logical culprit.</p>
<p>Bob<br>
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<div class="moz-cite-prefix">On 2/19/2019 12:14 PM, i erbs wrote:<br>
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<div dir="ltr">Short of pulling my head, is there anyway to test
where the oil is coming from? My rear air filter has a lot of
oil blow by. I should clean it every 1000 miles or so. So is it
coming from Valve stem seals, valve guides or rocker arm??? When
I adjusted my valves I did not see a lot of oil pumping from the
rocker arms. I plan to drive my car on a 3000 trip in Sept from
Portland,OR to Deadwood, SD fro Conclave and thought I should
address this before going.<br clear="all">
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<div dir="ltr">Ira Erbs
<div>Portland,OR</div>
<div><span
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<span
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(______ \____1959 BN4____/
_______)</span><br
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<span
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(_________________________)</span></div>
<div> BT7 engine and
disk brakes</div>
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<div>1967 MGB <img
src="http://www.britishcarspecialists.com/assets/images/MG_emblem.jpg"
alt="MG"
moz-do-not-send="true"></div>
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