Hey guys and gals. Just like most of you got bitten by a bug and bought a GX470. It's a 2004 with 94K. I have been slowly working through some issues. Shocks etc. are pretty straight forward. Runs "all right" but I did hear it running a little rough / odd. No codes and I don't know the history of service so I bought a set of stock spark plugs and tackled the job. Guys I am 75 years old and feeling everyday of it. The first two plugs 1 & 3 were pretty rough to get out and I almost stopped right there but went on more out of curiosity than anything. I have seen plugs before and most looked like old used spark plugs. #'s 5 & 4 have some serious carbon on the thread but plug looks ok to me. Now #8 is a different story. OIL on the outside of the plug but not on the electrodes. This plug was not even in finger tight. At first I thought the threads were stripped but when I put the new one in it torqued up fine. Got all done and buttoned up and started it. Runs smooth and no warning lights so I am going to call it good. My guess is these were the original plugs and really needed replaced. Any information / insight would be much appreciated.
Technical Spark Plug Reading. Someone step up!
- Thread starter dunk50
- Start date
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Looks like there was oil pooling around the base of the spark plug. Perhaps it was leaking in through the rubber seal between the spark plug tube and the valve cover. If so you might need new valve cover gaskets. I'd check it again in a few weeks and see if the tube is oily again to get an idea of the speed of the leak (if it is just a tiny seep and takes years to fill the tube, I'd be inclined to not worry about it).
Spark plugs do work loose on occasion if not tightened correctly. Good catch on your part for finding/fixing that. Congrats on still wrenching at 75, man!
- Thread starter
- #4
Thanks Steve although I must say that a couple tough plug removals and some physical gyrations did put me to the test. Now on to rear air bag delete, apex recovery point installs, trans case lowering etc etc etc. Stay safe.
