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Oil seeping through the intake bolt holes?
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rick_c
V-6 Camaros rule!
| Posts: 29
| Joined: 04/09
Posted: 06/11/09 07:58 AM
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I'm running about 80lbs of oil pressure, and I have oil in the middle bolt pockets on the intake. What would cause this, and is there a way to fix it. I don't have a vacuum leak that I know of and the motor runs strong.
I just need advise...thanks
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Pontiacman2
Everything in my driveway’s a Chevy
| Posts: 647
| Joined: 01/08
Posted: 06/11/09 09:17 AM
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What intake is on the engine and what intake gaskets did you use is the valve covers leaking to.
Professional hi-performance engine builder
Horsepower sells Engines and torque wins races.
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85_trans_am
My first time was in a Chevy
| Posts: 240
| Joined: 05/09
Posted: 06/11/09 12:39 PM
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ok brody. put thread sealant on the center bolts of the intake. thoughs are or should be thru. holes.(depending on the heads) The oil is probly working its way up through the threads. Clean everything up with cleaner before using thread sealant. Or its the valve cover gaskets. You can get around the by useing a good rtv. preff. motor black rtv. Use that instead of a gasket. hope this helps.
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chevelle83
I have an SS396 tatoo
| Posts: 356
| Joined: 10/08
Posted: 06/11/09 06:08 PM
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yep, thread seal the 4 middle bolts I have had this problem often.
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waynep712
I have an SS396 tatoo
| Posts: 358
| Joined: 12/07
Posted: 06/11/09 07:32 PM
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i agree on sealer... but.. i want to know... do you have a PCV valve hooked to manifold vacuum on one valve cover and a filtered breather on the other..
the pcv valve pulls blow by from the crank case...
at idle... the pcv can pull more than there is blow by at idle... so it needs a filtered breather to allow filtered air into the crank case.. without this breather.. there will be enough vacuum buildup to crush the oil pan and valve covers...
when you rev the motor up and put it under load... the manifold vacuum drops and the blowby increases to enough that the pcv cannot handle the load.. this can cause excess pressure in the crank case.... can blow out crank and camshaft seals on some motors... blow out pan gaskets , valve cover gaskets... intake manifold end seals.. and blow oil through any bolt hole with a loose thread fit...
there are various flow rates of pcv valves... a company called RIMAC used to make a pcv tester.. that you would set over the breather opening to see if the pcv was working with a proper flow rate...
too much flow.. the engine will burn oil.. about 400 miles a quart...
the amount of oil pressure has nothing to do with oil leaking through the intake manifold bolts... except maybe on a honda ... where some of the intake studs might intersect the oil galley...
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rick_c
V-6 Camaros rule!
| Posts: 29
| Joined: 04/09
Posted: 06/13/09 08:48 PM
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I don't think its the valve cover gaskets, the side of the manifold is dry. It's just in the bolt pockets. Its a performer RPM intake with felpro intake gaskets. I'm thinking the sealant idea is what I'll do, but I put blue locktite on them when I built it, so i thought that would suffice. What kind of sealant should I use on the bolts? Red RTV?
And yes, I have a PCV on the drivers side, and an Edelbrock filtered breather on the passenger side. Don't know about flow on the pcv, i just used the one that my work computer said. What if I just put another one in place of the pcv with the vacuum port for the carb?
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Pontiacman2
Everything in my driveway’s a Chevy
| Posts: 647
| Joined: 01/08
Posted: 06/14/09 08:15 AM
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ARP thread sealer works great.
Professional hi-performance engine builder
Horsepower sells Engines and torque wins races.
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waynep712
I have an SS396 tatoo
| Posts: 358
| Joined: 12/07
Posted: 06/14/09 08:27 AM
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there is one thing i forgot to mention....
fuel boil over from heat soak after shut down... with the heat buildup in the engine... heat goes up.. it boils the fuel in the carb.. it comes out the booster venturis drips down onto the throttle butterflys... without the engine pulling vacuum.. it can wick out through the throttle shaft bore.. drip onto the intake and puddle just below the carb... right where you describe...
got an electric fuel pump?????? try shutting the pump off... then running the carb dry when you shut it off .... this may be hard with a holley 4 bbl as its hard to empty the secondary bowl... see if the problem stops...
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Redbeast1
V-6 Camaros rule!
| Posts: 47
| Joined: 11/07
Posted: 06/16/09 03:24 PM
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I agree with Pontiacman2. ARP thread sealer i s the best way to go. Threadlocker alone wont do the job for very long. The same thread sealant should be used on the water pump bolts that go into the water jacket. ARP products are the best and their sealant is not that expensive.
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rick_c
V-6 Camaros rule!
| Posts: 29
| Joined: 04/09
Posted: 06/16/09 07:28 PM
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Its definately not fuel...I wouldnt let it slide if it was. I'm not loosing very much oil. Just enough to agitate me. Checked the torque on the bolts, and its good. So I'll just do what yall said, but where do I get it?
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