bad blow by and what causes it?
Thread Starter
Registered User
Joined: Aug 2002
Posts: 29
From: orlndo, florida usa
bad blow by and what causes it?
i have alot of smoke that comes off of my valves
and oil fill cap....really bad blow by..i had to put a breather on it or my oil would shoot out of my dip stick until i get about half a quart low......then it will eventully stop...its an older 305 and i would expect things to this nature but it doesnt rob power...
is this a bad sign?
anything cheap i can do?
thanks again
Dan
and oil fill cap....really bad blow by..i had to put a breather on it or my oil would shoot out of my dip stick until i get about half a quart low......then it will eventully stop...its an older 305 and i would expect things to this nature but it doesnt rob power...
is this a bad sign?
anything cheap i can do?
thanks again
Dan
Registered User
Joined: Jun 2001
Posts: 3,737
From: waterford, MI - USA
well make sure the pcv system is working correctly. make sure the valve is good and it is hooked up to eng. manifold vacuum. are you sure your not over filling it? it should take 5 qrts.(w/a short filter)other then that maybe your rings are bad or the cly. walls are glazed. good luck. chris
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1986 Iroc Z
355, ported camel hump heads,750 holley, 700r4, 10.5 compr., forged flat tops, solidcam .501I .510E, 4gen rear w/3:73 posi, girdle, and disc's, Edel. torker II, shift kit, 3500 stal, hedmann LT. headers, 4 gen seats, man. strg., lt1 starter, alum. w/p, msd 6al, coil, dist., mallory wires.13.34 @102mph best w/that combo. have trick flow heads and tighter conv. to put in currently.
1995 z28,SS Hood, Iroc style spoiler, tints and black outs, 700r4,2400 act. stall speed,B&M hammer shifter, 17" budnick trilogy III wheels, 275/40 ZR17, 160 stat, man. cooling fan sw., homemaid CAI,1LE elbow, hypertech airfoil, t.b.bypass,!cat, flowmaster, !maf screen, relocated batt., 1LE front l.c.a.s', poly trans and torq.arm bushings, MSD 6AL, custom program, p&p maf, accel coil, and under drive pulley
mods that i have, just not on car yet:
msd wires, edelbrock mid. headers, edelbrock rpm catback
------------------
1986 Iroc Z
355, ported camel hump heads,750 holley, 700r4, 10.5 compr., forged flat tops, solidcam .501I .510E, 4gen rear w/3:73 posi, girdle, and disc's, Edel. torker II, shift kit, 3500 stal, hedmann LT. headers, 4 gen seats, man. strg., lt1 starter, alum. w/p, msd 6al, coil, dist., mallory wires.13.34 @102mph best w/that combo. have trick flow heads and tighter conv. to put in currently.
1995 z28,SS Hood, Iroc style spoiler, tints and black outs, 700r4,2400 act. stall speed,B&M hammer shifter, 17" budnick trilogy III wheels, 275/40 ZR17, 160 stat, man. cooling fan sw., homemaid CAI,1LE elbow, hypertech airfoil, t.b.bypass,!cat, flowmaster, !maf screen, relocated batt., 1LE front l.c.a.s', poly trans and torq.arm bushings, MSD 6AL, custom program, p&p maf, accel coil, and under drive pulley
mods that i have, just not on car yet:
msd wires, edelbrock mid. headers, edelbrock rpm catback
Registered User
Joined: Jul 2000
Posts: 1,880
From: Norfolk, VA. USA
I had really bad blow-by when one the piston rings went bad on one of my cylinders.
Take a look at it,
http://www.transamws6.com/pics/transam/piston01.jpg
http://www.transamws6.com/pics/transam/piston02.jpg
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1986 Trans Am WS6
LT4 350, LT4 Hot Cam, T56, 52mm TB, MSD 6A & Blaster 3 Coil,
LT1 3.42 Posi/Disc Rear, Lakewood LCA's & Adjustable Panhard Bar,
Eibach Lowering Springs, 17x9 WS6 Wheels, T-Tops,
Custom 4" CAI w/ K&N Filter, 160*stat.
Autometer TriplePod with Phantom A/F & Boost Gauges.
High Speed Run: 157mph
Best 1/4 mile run: 14.94@91.67mph This was with the LG4 carb setup.
WS6 Trans Am.
Take a look at it,
http://www.transamws6.com/pics/transam/piston01.jpg
http://www.transamws6.com/pics/transam/piston02.jpg
------------------
1986 Trans Am WS6
LT4 350, LT4 Hot Cam, T56, 52mm TB, MSD 6A & Blaster 3 Coil,
LT1 3.42 Posi/Disc Rear, Lakewood LCA's & Adjustable Panhard Bar,
Eibach Lowering Springs, 17x9 WS6 Wheels, T-Tops,
Custom 4" CAI w/ K&N Filter, 160*stat.
Autometer TriplePod with Phantom A/F & Boost Gauges.
High Speed Run: 157mph
Best 1/4 mile run: 14.94@91.67mph This was with the LG4 carb setup.
WS6 Trans Am.
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