Tremek Car Video Forum

robz95xj · 26 Mar 2008, 03:27 pm

my truck has a blowby issue, i put a 2 liter sprite bottle in the middle of the ccv line so shit wasnt goin everywhere and makin my air filter a mess, the truck has gotten a compression test and all cylinders were well in spec, theres just clear water and some foam in the sprite bottle, draining the oil it looks fine so wtf is it?

01mmmz28 · 26 Mar 2008, 03:39 pm

Buy or make a catch can.

robz95xj · 26 Mar 2008, 04:10 pm

what do you think the sprite bottle is? any idea what could be causing it? could it be a head gasket?

01mmmz28 · 26 Mar 2008, 04:23 pm

no, blow by is normally caused by the rings. Either having gapped over time or from being installed wrong. Does the vehicle in question have a PCV system? if so, just remove the PCV check valve and go to lowes and hit up the plumbing section and find the correct diameter double ended female union and hook up both ends of the tubing where the PCV valve used to be and clamp the ends after the install, that will help some, it did on mine. You should really get a real catch can or get the homemade version from home depot or lowes. It is a air compressor filter, made by husky, it has a "in" line and a return line...you need a catch can w/ both for it to be affective.

joeo · 27 Mar 2008, 06:24 pm

I would perform a leak down test. During the test listen to where the air is coming out. If bubbles are coming into the coolant, then it's likely that the head gasket is blown...if are is coming from the crankcase, then it's probably bad rings, or a broken ring land. If air is coming out the intake/exhaust then it's a stuck valve.
Leak down tests are much more telling than a compression test.

Leak Down Testing

-Joe
Do you Love Horsepower?

26 Mar 2008, 03:27 pm	#1 (permalink)
robz95xj I'm Takin A Shit Join Date: Mar 2005 Location: Under the Jeep Posts: 12,947 robz95xj's Gallery	bad blowby my truck has a blowby issue, i put a 2 liter sprite bottle in the middle of the ccv line so shit wasnt goin everywhere and makin my air filter a mess, the truck has gotten a compression test and all cylinders were well in spec, theres just clear water and some foam in the sprite bottle, draining the oil it looks fine so wtf is it? __________________ 1995 Jeep Cherokee Sport-6.5" lift & 35's 1993 Jeep Cherokee Sport-1.5" lift & stockers

26 Mar 2008, 03:39 pm	#2 (permalink)
01mmmz28 Obsessed Tremekian Join Date: Dec 2005 Location: On a national search to find burgh a dentist that will work on baboon teeth. Posts: 5,814 01mmmz28's Gallery	Re: bad blowby Buy or make a catch can. __________________ 2001 Z/28 Cam, exhaust, gears = a lot faster than your mustang. Extending the smack down back hand upon ricers and stangs since July 2001.

26 Mar 2008, 04:10 pm	#3 (permalink)
robz95xj I'm Takin A Shit Join Date: Mar 2005 Location: Under the Jeep Posts: 12,947 robz95xj's Gallery	Re: bad blowby what do you think the sprite bottle is? any idea what could be causing it? could it be a head gasket? __________________ 1995 Jeep Cherokee Sport-6.5" lift & 35's 1993 Jeep Cherokee Sport-1.5" lift & stockers

26 Mar 2008, 04:23 pm	#4 (permalink)
01mmmz28 Obsessed Tremekian Join Date: Dec 2005 Location: On a national search to find burgh a dentist that will work on baboon teeth. Posts: 5,814 01mmmz28's Gallery	Re: bad blowby no, blow by is normally caused by the rings. Either having gapped over time or from being installed wrong. Does the vehicle in question have a PCV system? if so, just remove the PCV check valve and go to lowes and hit up the plumbing section and find the correct diameter double ended female union and hook up both ends of the tubing where the PCV valve used to be and clamp the ends after the install, that will help some, it did on mine. You should really get a real catch can or get the homemade version from home depot or lowes. It is a air compressor filter, made by husky, it has a "in" line and a return line...you need a catch can w/ both for it to be affective. __________________ 2001 Z/28 Cam, exhaust, gears = a lot faster than your mustang. Extending the smack down back hand upon ricers and stangs since July 2001.

27 Mar 2008, 06:24 pm	#5 (permalink)
joeo Young Noob Join Date: Jul 2006 Posts: 77 joeo's Gallery	Re: bad blowby I would perform a leak down test. During the test listen to where the air is coming out. If bubbles are coming into the coolant, then it's likely that the head gasket is blown...if are is coming from the crankcase, then it's probably bad rings, or a broken ring land. If air is coming out the intake/exhaust then it's a stuck valve. Leak down tests are much more telling than a compression test. Leak Down Testing -Joe Do you Love Horsepower?

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