i need help w/ some pressure - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**hilljob26** · 08-01-2005, 09:29 PM

i seem to be getting some unfortunite crankcase pressure,my engine is leaking a liitle bit of oil aound the dipstick tube,anybody have any ideas,it doesn't seem real bad,but a leak is a leak to me,i hate freakin oil leaks,its an after market aluminum stick,but i think the tube is just a chrome one,is that the problem ya think,any help would be appreciated

Longhorn Man · 08-01-2005, 09:39 PM

Do you have a PCV deal on one of the valve covers?

Fred T · 08-01-2005, 09:41 PM

Check your pcv valve by pulling it out and shaking it lengthwise. If it doesn't rattle, it is gummed up and either needs cleaned or replaced.

**hilljob26** · 08-01-2005, 10:08 PM

i have 2 brand new aluminum breathers,any ideas

neonlarry · 08-01-2005, 10:15 PM

Everbody I have ever heard that used a chrome dipstick tube complained that it leaked. Get a new factory tube.

walker · 08-01-2005, 11:55 PM

Get a factory tube, or a new chrome one and sand the chrome off, them apply some goo (copper silicon, etc) and reinstall. Also, breathers do not eliminate the reason, or the need for a pcv valve. The pcv valve creates a slight negative pressure in the crankcase and thus, keeping the oil in the dipstick tube.
BTW I had the same trouble on a 350.

Longhorn Man · 08-02-2005, 12:02 AM

Get rid of one of the breathers, and install a PCV set up plumbed to the carb or intake (perferably carb) and I agree on getting the chrome tube outa there too.....then you'll be set.

08-01-2005, 09:29 PM	#1
hilljob26 Registered User Join Date: Dec 2004 Location: Gypsum Kansas 67448 Posts: 1,681	i need help w/ some pressure i seem to be getting some unfortunite crankcase pressure,my engine is leaking a liitle bit of oil aound the dipstick tube,anybody have any ideas,it doesn't seem real bad,but a leak is a leak to me,i hate freakin oil leaks,its an after market aluminum stick,but i think the tube is just a chrome one,is that the problem ya think,any help would be appreciated __________________ 21 2500hd duramax 58 apache HILLJOB GRAPHIX--for all your graphic needs My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=542497 LS ENGINE SWAP INFORMATION THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=377348 4l60 to an NP205 http://67-72chevytrucks.com/vboard/s...43#post3697343

08-01-2005, 09:41 PM	#3
Fred T Cantankerous Geezer Join Date: Aug 2002 Location: Bel Aire, KS Posts: 6,264	Check your pcv valve by pulling it out and shaking it lengthwise. If it doesn't rattle, it is gummed up and either needs cleaned or replaced. __________________ Fred There is no such thing as too much cam...just not enough engine.

08-01-2005, 10:08 PM	#4
hilljob26 Registered User Join Date: Dec 2004 Location: Gypsum Kansas 67448 Posts: 1,681	i have 2 brand new aluminum breathers,any ideas __________________ 21 2500hd duramax 58 apache HILLJOB GRAPHIX--for all your graphic needs My build thread http://67-72chevytrucks.com/vboard/s...d.php?t=542497 LS ENGINE SWAP INFORMATION THREAD http://67-72chevytrucks.com/vboard/s...d.php?t=377348 4l60 to an NP205 http://67-72chevytrucks.com/vboard/s...43#post3697343

08-01-2005, 10:15 PM	#5
neonlarry Registered User Join Date: Feb 2002 Location: Vacaville, CA Posts: 2,745	Everbody I have ever heard that used a chrome dipstick tube complained that it leaked. Get a new factory tube. __________________ 70 C/10 Light Red 350/TH350, HEI, Duals w/40 series Flows, 91 seat, LED taillights 99 Pontiac S/C GTP, SLP Ram Air hood, GMPP Konis & springs 95 Neon ACR, MP PCM, AFX UDP, 3.0 CAI

08-01-2005, 11:55 PM	#6
walker Registered User Join Date: Jul 2003 Location: north of Phx AZ about 30 miles Posts: 698	Get a factory tube, or a new chrome one and sand the chrome off, them apply some goo (copper silicon, etc) and reinstall. Also, breathers do not eliminate the reason, or the need for a pcv valve. The pcv valve creates a slight negative pressure in the crankcase and thus, keeping the oil in the dipstick tube. BTW I had the same trouble on a 350. __________________ Andy,Phx AZ '67 C-10 (Ahhh, done at last. Well there is that disk front end I want to put in and...) "23 C-Cab-sold '48 Ford 8N tractor(still working) '67 Scout(Now on the road) '70 MG B.-sold

08-01-2005, 09:39 PM	#2
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Do you have a PCV deal on one of the valve covers?

08-02-2005, 12:02 AM	#7
Longhorn Man its all about the +6 inches Join Date: Jan 2001 Location: Hilliard Ohio Posts: 2,690	Get rid of one of the breathers, and install a PCV set up plumbed to the carb or intake (perferably carb) and I agree on getting the chrome tube outa there too.....then you'll be set.



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