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Hummer H3For the Hummer driver who wants the rugged look and off road capabilities of the Hummer, but in a smaller size and with a more fuel economy friendly engine.
H3, 3.7l 2007.
When I bought it more than year ago, 1st thing i did, its change the spark plugs, because the engine was misfiring badly. So the 1st thing i noticed when took off the coils, that the 1st cylinder was full of water. So I wondered right away it was source of that issue. Anyways, I dry it with air, change the plugs and obviously the problem vas gone.
2 days ago the engine start to misfire.. worst and worst , when plug computer (see picture) right away i though about moist in 1st cylinder. Come to shop, remove it all.. it was full of water and bunch of rust. Remove the spark plug- full of rust, like I change it 1000000 km ago (see picture) inside the gap - filth and water (see picture)
Anyways, that was clear - the water leak..
My driveway toward the garage is down slope, normally I park backing up., so I start to play with water throwing it on my hood, roughly copying the position when I park. Apparently the holes where clips go of plastic thing on the hood (see picture)letting water go exacly on the spot , where 1 cylinder position is. I guess after tomorrow ill get some silicone to fix the leak. That info could be useful for someone.
Merry Christmas to ya all.
Yes indeed, doesn't add up: "My driveway toward the garage is down slope, normally I park backing up" Water would flow to the lowest point, which would be the #5 cylinder. On a side note, I always back into my driveway, since the down slope is away from the garage(towards #1 cylinder). Regardless, water intrusion will always be there, change those boots then, you can simply test, spraying a garden hose over the engine, and recheck for moisture intrusion!
Yes indeed, doesn't add up: "My driveway toward the garage is down slope, normally I park backing up" Water would flow to the lowest point, which would be the #5 cylinder. On a side note, I always back into my driveway, since the down slope is away from the garage(towards #1 cylinder). Regardless, water intrusion will always be there, change those boots then, you can simply test, spraying a garden hose over the engine, and recheck for moisture intrusion!
Well, I tested it with water, putting the hood lid approximative in the position, when on my driveway... the water was licking from the middle clip, right on top of cylinder 1. Just Silicon in today, will check it now how it works...
interesting thing... misfire cyl 1
