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Old 09-11-2019, 07:36 PM   #1
Haystack
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Well I was driving my 87 240 home from work today when all of a sudden there was some vibrating and a loud noise. No dash lights came on so I limped it to the off ramp thinking it was a flat tire, got out to inspect and found that all of the tires were fine. I went to start it up again and it sounded like a straight piped tractor. I didn't want to investigate too much on the side of the freeway off ramp so I got it towed home. Once home I popped the hood to check the oil which looked fine, go to check the plugs only to find one of the spark plug boots just dangling, yep blew a spark plug right out of the head. Checked the coolant and it's mucky. Pour some out for my baby guys, shes dead for now
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Old 09-11-2019, 08:41 PM   #2
Rusty_ratchet
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I'm sorry to hear of your car troubles
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Old 09-12-2019, 12:25 AM   #3
John242Ti
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Use a spark plug thread chaser to clean the threads up, reinstall the plug, which may still be in the engine compartment somewhere, then change your coolant. It may not be a blown head gasket. Same thing once happened to me on an '84 245GL. Blew #2 out the plug hole. No acceleration, sounded like a lawnmower. Pulled off to the side, and discovered that yes, there was no plug in that cylinder. Installed a spare that was in the car, reconnected the plug wire, and kept driving.
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Old 09-12-2019, 12:41 AM   #4
Redwood Chair
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Throw a cylinder head on there and soldier on.
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Old 09-12-2019, 04:18 AM   #5
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Old 09-12-2019, 07:23 AM   #6
rwb
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Quote:
Originally Posted by Redwood Chair View Post


Throw a cylinder head on there and soldier on.
Perfectly normal, perfectly natural, it's basically routine maintenance
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Old 09-12-2019, 11:06 PM   #7
Redwood Chair
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Perfectly normal, perfectly natural, it's basically routine maintenance


They all pretty much need a head gasket by 200K, and they mostly all have that by now.
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Old 09-13-2019, 03:38 PM   #8
dl242gt
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it is a lot easier to repair plug threads with the ehad off. If the threads are really trashed. A timesert is the best permanent repair. Number four is basically impossible to repair in situ.
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