Intake pulling oil in? - Chevelle Tech
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post #1 of 10 (permalink) Old May 8th, 19, 4:12 PM Thread Starter
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Jesse
 
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Intake pulling oil in?

Playing with my new borescope, engine is fresh and using oil. Reused intake that was leaking on last engine. All the gaps looked good when I test fit it. New block is zero decked. What do you guys think. I'm going to put a RPM on in place of this Weiand single plane. If when I pull the intake and gaskets look good I guess I'll double check intake seals and rocker studs for sealer... Always something
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Jesse
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post #2 of 10 (permalink) Old May 8th, 19, 4:50 PM
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Re: Intake pulling oil in?

Before you pull the intake. . . if you havent got it too far apart yet . . . take the breathers or pcv valve or whatever you have in the valve covers out. Block off one of the valve covers holes completely. Tape will work fine. Start the engine and take some Gumout carburetor cleaner and shoot about 5 seconds worth into the hole in the other valve cover. If the intake is sucking oil the idle will change a few seconds after you squirt the carb cleaner into the valve cover. That will at least let you know if you are on the right track with the intake change.

Also make sure it isnt pulling it through the pcv valve. The hose should be dry. Valve stem seals would have to be completely gone to make it use a lot of oil. Early engine didnt even have them.

I cant tell from your pictures if there is supposed to be oil in there ??
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post #3 of 10 (permalink) Old May 8th, 19, 10:34 PM
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Re: Intake pulling oil in?

A while back I had that done with a bore scope, No reaming involved,, Just an inspection. The stuff they gave to drink was TERRIBLE ! Yep, They used a bore scope or sumpen like it ! LOL !
Bob


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post #4 of 10 (permalink) Old May 9th, 19, 4:10 AM
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Re: Intake pulling oil in?

Quote:
Originally Posted by Robinls5 View Post
A while back I had that done with a bore scope, No reaming involved,, Just an inspection. The stuff they gave to drink was TERRIBLE ! Yep, They used a bore scope or sumpen like it ! LOL !
Bob
Did you have oil in your port, Bob?


I actually had oil in some of my engine's head ports, too. I tried high tack around the ports, but that didn't work. My heads are angle milled, so my engine guy is going to check the intake/head interface angles and correct if necessary.

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post #5 of 10 (permalink) Old May 9th, 19, 5:57 AM
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Re: Intake pulling oil in?

I cant tell anything from the pictures;yet Bill gives the right diagnostic procedure. If you do pull the intake, you'll see tell tale signs on the intake gaskets. BTDT.

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post #6 of 10 (permalink) Old May 9th, 19, 9:24 AM Thread Starter
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I bought this intake new, old block wasn't decked but had shim head gaskets. I thought I hurt it when it got hot (burning oil).When I took intake off it was obvious gaskets were not sealing on bottom. So I mocked it up on new engine, gaps all looked good, but it's burning oil too. I'll do the checks and suspected the pcv valve as well. Should have it ready to go next week sometime.
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post #7 of 10 (permalink) Old May 9th, 19, 10:09 AM
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Re: Intake pulling oil in?

so you reused old gaskets and have a leak did I read that right? Mr Gasket makes some thicker ones you can play with

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post #8 of 10 (permalink) Old May 9th, 19, 12:41 PM Thread Starter
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Re: Intake pulling oil in?

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Originally Posted by cuisinartvette View Post
so you reused old gaskets and have a leak did I read that right? Mr Gasket makes some thicker ones you can play with
No reused the intake, not gaskets.

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post #9 of 10 (permalink) Old May 9th, 19, 12:57 PM
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Gene
 
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Re: Intake pulling oil in?

I was using a 1969 rectangular tripower intake, and then mating it to oval port heads. The bottom rail, @ the bottom of the port, is wickedly thin. I literally draw filed the surface flat, and then LOVINGLY rubbed RTV all around the ports before I set the intake down on the gaskets/heads. Again, its pretty thin on some intakes and care is required.
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Last edited by LevonH; May 9th, 19 at 3:10 PM.
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post #10 of 10 (permalink) Old May 24th, 19, 6:37 PM Thread Starter
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Finally got it fired up, PCV hose has oil in it but disconnecting it didn't seem to help. I put tape over both holes in the valve covers and they puffed up which is good. I've got to pick up a can of carb cleaner, to spray while it's running. I'm questioning myself if I sealed the rocker studs or not, LOL. With PCV removed and two breathers installed it still smokes. I imagine it needs to run quite a while to burn off all residual oil though. I haven't pulled the intake yet.

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