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Old 07-21-2019, 10:21 AM   #1
AnthonyG
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Default Smoke from oil cap?

Been having a great season w my 35 w an 8BA until now. I was almost home after an hour ride & thought Id wind it up a bit up the hill to my house. Immediately following noticed a bit of smoke from engine compartment. Pulled in the drive & further inspection showed some smoke coming from oil cap? None from exhaust. Starts fine runs fine. I do have a PCV connected from rear crankcase vent tube to manifold vacuum. Any thoughts?
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Old 07-21-2019, 10:33 AM   #2
oldskool
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Default Re: Smoke from oil cap?

shouldn't the pcv valve be installed where the draft tube used to be?
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Old 07-21-2019, 10:54 AM   #3
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Default Re: Smoke from oil cap?

Is the PCP valve ball free, i.e. can you hear it rattle if shaken? Maybe it is full of oil or crud.


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Old 07-21-2019, 11:00 AM   #4
AnthonyG
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Default Re: Smoke from oil cap?

Probably calling it out wrong. If the draft tube is here I’m calling it a crankcase vent.IMG_2430.PNG
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Last edited by AnthonyG; 07-21-2019 at 11:16 AM.
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Old 07-21-2019, 11:17 AM   #5
19Fordy
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Default Re: Smoke from oil cap?

Photos please.
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Old 07-21-2019, 12:56 PM   #6
Ggmac
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Default Re: Smoke from oil cap?

Quote:
Originally Posted by AnthonyG View Post
Been having a great season w my 35 w an 8BA until now. I was almost home after an hour ride & thought Id wind it up a bit up the hill to my house. Immediately following noticed a bit of smoke from engine compartment. Pulled in the drive & further inspection showed some smoke coming from oil cap? None from exhaust. Starts fine runs fine. I do have a PCV connected from rear crankcase vent tube to manifold vacuum. Any thoughts?
Possible that you have too much oil in it ? Running up hill could have had the crank whip up some oil , more that could have been handled by the rings , and it was vented by the cap ? Just guessing of course .
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Old 07-21-2019, 01:30 PM   #7
supereal
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Default Re: Smoke from oil cap?

Make sure the vent at the right front corner of the oil pan is unobstructed The PCV can't operate correctly if there is no makeup air source.
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Old 07-21-2019, 02:33 PM   #8
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Default Re: Smoke from oil cap?

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Originally Posted by supereal View Post
Make sure the vent at the right front corner of the oil pan is unobstructed The PCV can't operate correctly if there is no makeup air source.
There is not any vent on the right front corner of an 8BA oil pan.
It vents at the filler tube.
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Old 07-21-2019, 03:32 PM   #9
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Default Re: Smoke from oil cap?

Quote:
Originally Posted by glennpm View Post
Is the PCP valve ball free, i.e. can you hear it rattle if shaken? Maybe it is full of oil or crud.


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What he said.
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Old 07-21-2019, 04:47 PM   #10
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Default Re: Smoke from oil cap?

compression check?
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