Author Topic: Crankcase Pressure  (Read 255 times)

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Offline Tim Hensley

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Re: Crankcase Pressure
« Reply #15 on: June 09 2018, 04:27:29 AM »
You can not build boost just reving the engine in park.
So it canít be boost coming out the valve cover.
Could be a head gasket,but cars with a bad head gasket usually idle and just off idle,run  poorly.
Pistons going up can pull air in and pistons going down can push that same air out.
Proper system keeps crankcase under vacuum, assuming rings and valve guides are good, so cover your valve cover with your hand and see if your PCV valve is working at idle.you will need to come off idle just a little for it to start sucking.[size=78%]http://www.agcoauto.com/content/news/p2_articleid/197[/size] Good read on PCV system.

Offline TWild

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Re: Crankcase Pressure
« Reply #16 on: June 10 2018, 10:35:23 AM »
Thanks Tim,


I'll check it out.


TW
87' GN, 109 girdled block, Precision 6776, SLIC, Alky, Comp 212/212  flat tappet, stock valve train, TT5.6 Chip, 60lb injectors.

Offline Scoobum

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Re: Crankcase Pressure
« Reply #17 on: June 10 2018, 10:36:52 AM »
Thanks Tim,


I'll check it out.


TW


What's your BLM's at idle with the engine warmed up?
109 STD Bore Short Block-Balanced Rotating Assembly
Stock Crank
Stock Pistons
Stock Rods
Stock Timing Chain/Gears
212/212 Flat Tappet Cam
8445 Race Ported Big Valve Heads
Stock Rockers
5.7 TT 110 Race Chip
Built 2004R
AC 16930
6262 JB

6.72 at 104.67-1.58-25 PSI

Offline TWild

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Re: Crankcase Pressure
« Reply #18 on: June 10 2018, 08:16:28 PM »
Scoobum,


If I remember correctly, blm = 132, warmed up at idle in park.
87' GN, 109 girdled block, Precision 6776, SLIC, Alky, Comp 212/212  flat tappet, stock valve train, TT5.6 Chip, 60lb injectors.


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