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26 Mar 2008, 03:27 pm
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#1 (permalink) |
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Oooo Pretty Bumper
Join Date: Mar 2005
Location: I'm Thinkin Of Takin' A Shit On Ramseys Trans Am
Posts: 12,862
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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?
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1995 Cherokee Sport 6", 35's 1992 Ford F-150, 2WD, 5.0 and now rollin on MONSTER 31's |
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26 Mar 2008, 03:39 pm
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#2 (permalink) |
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Veteran Tremekian
Join Date: Dec 2005
Location: On a national search to find burgh a dentist that will work on baboon teeth.
Posts: 4,845
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Re: bad blowby
Buy or make a catch can.
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2001 Z/28 LS1. Texas speed cam 231/237 598/595 112 lsa, .660 lift springs,7.4 hardened pushrods, lid, LT headers,TSP X pipe,Texas speed "true duels",Richmond 4.10 gears, stud kit, Thunder racing girdle cover, Spec stg 3+ clutch, ARP rod bolts, clevite main and rod bearings, 25% underdrive pulley, SLP 85mm MAF,black ZR1 rims 315/35/17 Nitto DR's, BMR subframes, BMR LCA's, Edelbrock TQ Arm, BMR pan hard bar. LS2 timing chain and gear set, LS6 ported oil pump.... Tuned by R.P.M. Performance. All labor done my ME and a few good friends !!!! 
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26 Mar 2008, 04:10 pm
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#3 (permalink) |
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Oooo Pretty Bumper
Join Date: Mar 2005
Location: I'm Thinkin Of Takin' A Shit On Ramseys Trans Am
Posts: 12,862
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Re: bad blowby
what do you think the sprite bottle is? any idea what could be causing it? could it be a head gasket?
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1995 Cherokee Sport 6", 35's 1992 Ford F-150, 2WD, 5.0 and now rollin on MONSTER 31's |
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26 Mar 2008, 04:23 pm
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#4 (permalink) |
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Veteran Tremekian
Join Date: Dec 2005
Location: On a national search to find burgh a dentist that will work on baboon teeth.
Posts: 4,845
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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.
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2001 Z/28 LS1. Texas speed cam 231/237 598/595 112 lsa, .660 lift springs,7.4 hardened pushrods, lid, LT headers,TSP X pipe,Texas speed "true duels",Richmond 4.10 gears, stud kit, Thunder racing girdle cover, Spec stg 3+ clutch, ARP rod bolts, clevite main and rod bearings, 25% underdrive pulley, SLP 85mm MAF,black ZR1 rims 315/35/17 Nitto DR's, BMR subframes, BMR LCA's, Edelbrock TQ Arm, BMR pan hard bar. LS2 timing chain and gear set, LS6 ported oil pump.... Tuned by R.P.M. Performance. All labor done my ME and a few good friends !!!!
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27 Mar 2008, 06:24 pm
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#5 (permalink) |
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Young Noob
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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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