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#1
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Strange spark plug coloring on a LandRover.
A co-worker was just showing me the plugs from his V8 Discovery. The plugs looks nice and brown on one half and the other is black. Has anyone an idea as to what this is from? He is thinking the ejectors.
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#2
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Is it carbon build-up from running too rich?
Or maybe burnt oil from a leaky gasket? IIRC The Rover K series engines are renowned for gasket problems. Last edited by b3lha; 06-07-2004 at 08:10 AM. |
#3
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May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#4
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put the plug in the engine as normal, and mark on the plug which direction each valve is towards it. match up the black and brown to the marks that represent valve locations.
if it is truly directional, it pretty much has to be related to one of the valves. this would let you see which valve it is that's most likely related to the problem.
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IggDawg is cool -IggDawg 1992 Teal SVX LS-L 160k miles 4.11:1 final drive, K&B dropsprings, ART front rotors, stainless steel brake, aluminum underdrive crank pulley, Kuhmo Ecsta Supra 712's, K&N drop-in filter. Previously owned by Alacrity024. FOR SALE 1994 SVX LSi, Barcelona Red #1659, build date 11/93, 117k miles, RIP ECUtune stage 1, bead crush, smallcar shift kit, TB bypass, SS brake lines, silencer removed, alternator and grounding wires, Mobil1 @ 117k |
#5
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Well that would be difficult to do now since all the plugs are out and which one came from what hole is not known.......
What do you think the problem would be with the valves? This engine is a push rod job and I think it only has one intake and exhaust valve per piston.
__________________
May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#6
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if I had to guess, I'd put my money on burning oil. perhaps he's sucking in oil through the intake, thus messing up the one side, then it gets burned and exhausted before it can mess up the other side? I'd want to ask a host of questions first. how old is the car? is it known to burn oil? were all the plugs this way or just a few? is the engine running alright or is it a little hurtin'?
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IggDawg is cool -IggDawg 1992 Teal SVX LS-L 160k miles 4.11:1 final drive, K&B dropsprings, ART front rotors, stainless steel brake, aluminum underdrive crank pulley, Kuhmo Ecsta Supra 712's, K&N drop-in filter. Previously owned by Alacrity024. FOR SALE 1994 SVX LSi, Barcelona Red #1659, build date 11/93, 117k miles, RIP ECUtune stage 1, bead crush, smallcar shift kit, TB bypass, SS brake lines, silencer removed, alternator and grounding wires, Mobil1 @ 117k |
#7
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Does the black wipe off, like soot, or is the ceramic itself discolored? If the former, I'd strongly suspect that the plug wasn't properly seated and that bypass gasses were the culprit.
dcb |
#8
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Well he bought it sight unseen over the internet for about $3500. The AFT line was crushed and blocked so he replaced that. Then he found it had a bad tranny and he got it rebuilt. Then he found the thermostat was stuck open and he replaced that. Now he finds the front idler rod is bent and has to replace that before the wheel alignment.
All 8 plugs look exactly the same. Too early to tell cause he has only driven it 120 miles. I do not see how blow by past the plug seat could do this.
__________________
May your transmission live forever. SuperbVehicleXtraordinary Proud sponsor of a 1992 SVX. |
#9
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dcb |
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