What can cause this???

89lx · February 28th, 2009, 12:59 PM

ill try and make this short and to the point, i keep fouling #7 plug. the oil pump shaft broke early in the year and a drove it for a few km's beofre i shut it down. i have 120 psi compression on the cly, spark and fuel. i tore the intake off and the heads off because i am upgrading. when i i tore the head off the gasket has fine and the top of the piston is covered with wet gunk (not coolant from taking the head off) and the valves to.

heres some pictures

http://memimage.cardomain.com/ride_i...0046_large.jpg

http://memimage.cardomain.com/ride_i...0045_large.jpg

93mustank · February 28th, 2009, 01:04 PM

Oil is fouling the plug.....time to rebuild

BlackedOut04GT · February 28th, 2009, 01:09 PM

Could be a bad piston ring thats getting oil blow by, or the valve guide could be going. If you are up for it, take the piston out and check the rings.

chickenbot · February 28th, 2009, 03:53 PM

ya you should be getting 150 psi at each cyl

89lx · February 28th, 2009, 10:31 PM

a rebuild was on the plan just because of the oil pump shaft, i ll have to take the piston out and ill let ya know

89LX347 · February 28th, 2009, 10:39 PM

150-160 is normal.might wanna do a leakdown but most likely its your rings.

89lx · March 1st, 2009, 12:30 PM

engine is already pulled, let the fun start

February 28th, 2009, 12:59 PM	#1
89lx Regular 1989 LX coupe 5.0L Join Date: Dec 2007 Location: NS Canada Posts: 496 iTrader: 0 reviews	What can cause this??? ill try and make this short and to the point, i keep fouling #7 plug. the oil pump shaft broke early in the year and a drove it for a few km's beofre i shut it down. i have 120 psi compression on the cly, spark and fuel. i tore the intake off and the heads off because i am upgrading. when i i tore the head off the gasket has fine and the top of the piston is covered with wet gunk (not coolant from taking the head off) and the valves to. heres some pictures http://memimage.cardomain.com/ride_i...0046_large.jpg http://memimage.cardomain.com/ride_i...0045_large.jpg __________________

February 28th, 2009, 01:04 PM	#2
93mustank Banned Join Date: Aug 2008 Location: Phoenix,AZ Posts: 3,014 iTrader: 1 reviews	Oil is fouling the plug.....time to rebuild __________________ PeteAndersonRacing.com

February 28th, 2009, 03:53 PM	#4
chickenbot Enthusiast 1990 mustang gt eventually Join Date: Nov 2007 Location: plano, tx Posts: 938 iTrader: 0 reviews	ya you should be getting 150 psi at each cyl __________________ 1990 gt 5.0 Mac Performance 76mm straight shot intake 70mm Accufab tb and egr spacer Trick Flow Track Heat u/l intake 3.55 gears MSD distributor, Blaster Coil, and 8.5mm wires

February 28th, 2009, 10:31 PM	#5
89lx Regular 1989 LX coupe 5.0L Join Date: Dec 2007 Location: NS Canada Posts: 496 iTrader: 0 reviews	a rebuild was on the plan just because of the oil pump shaft, i ll have to take the piston out and ill let ya know __________________

February 28th, 2009, 10:39 PM	#6
89LX347 Hardcore Enthusiast Join Date: Apr 2007 Posts: 1,304 iTrader: 0 reviews	150-160 is normal.might wanna do a leakdown but most likely its your rings. __________________ I believe in art when it is not seen. I believe in music when it is not audible. I believe in God when He is silent.

February 28th, 2009, 01:09 PM	#3
BlackedOut04GT Hardcore Enthusiast 2004 Mustang GT 14.21@97.93 2.107 60' (Best pass. So far.) Join Date: Sep 2008 Location: Maynard, MA. Posts: 1,855 iTrader: 0 reviews	Could be a bad piston ring thats getting oil blow by, or the valve guide could be going. If you are up for it, take the piston out and check the rings.

March 1st, 2009, 12:30 PM	#7
89lx Regular 1989 LX coupe 5.0L Join Date: Dec 2007 Location: NS Canada Posts: 496 iTrader: 0 reviews	engine is already pulled, let the fun start __________________

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