Something broke, now it shakes

JGrauman

JGrauman

New member
98 3rd gen. 175k miles, all regular maintenance, never had ANY issues out of this rig. I rarely drive it more than 20 miles a week as my job provides a take home vehicle. I regularly pull it into the street while I work in the garage. Tonight I went to pull it back in and because it doesn't get a lot of heat up time to burn off oil, I rev'd it up to clear out the blue smoke before I pulled it in so the garage wouldn't stink (yes, it burns oil). As I let off the gas there was a loud "clank" sound like something in the engine just snapped. The entire truck started shaking. I tapped the gas and it rev'd up normally, but as I let off it rattled like crazy. I drove it into the garage and the idle continued to shake badly. Rev'd it up again and same thing, goes up smooth and rattles on the way down. No codes have been thrown. I don't want to drive it around for fear I will be left on the road. It starts just fine. Any Ideas?
 
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Sounds like you could have broken a motor mount. Pop the hood, start the engine, put your left foot on the brake and put it in drive. With your left foot holding pressure on the brake, apply some pressure to the accelerator pedal with your right foot to rev the engine a little. The engine should move a little but not lift up. Now put it in reverse and do the same thing. If the engine actually lifts up a lot, you have a broken mount. You basically look through the crack under the hood into the engine compartment.
 
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Wishful think on the motor mount. Check engine light just came on, guessing this thing is going to be up for sale soon for someone who has time to rebuild an engine...
 
JGrauman said:
Wishful think on the motor mount. Check engine light just came on, guessing this thing is going to be up for sale soon for someone who has time to rebuild an engine...
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slow down there bud

whats the code for? just cause its a check engine light doesn't mean it needs a rebuild lol
 
OffRoadGuy said:
Check your plugs, wires, and injectors. You're missing and not running on all 6 cylinders. Man, I wish my engine bay was that clean!
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Clean it! I will check, in the middle of a room remodel this weekend. Haven't had time to mess with it. Really leaning towards Rod, piston. Something definitely sounded like it broke when it happened. Which is a no on the wires and plugs, maybe an injector would do that? Don't think so though. The video doesn't really do the noise Justice, it sounds like a ball-peen hammer is being smashed into the valve cover when you hear that little tick tick tick tick
 
JGrauman said:
Don't think so though. The video doesn't really do the noise Justice, it sounds like a ball-peen hammer is being smashed into the valve cover when you hear that little tick tick tick tick
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If you ever driven a 3rd gen on 4-5 cylinders, it will sound like it gonna die and all hell breaks loose. Hope its just a minor problem.
 
Sounds like it could be a connecting rod that broke. Easiest way to check it a compression test on all cylinders. If it's just a misfire, you'll still have compression. If it's a broken rod you won't.
 
I was going to say rod or rod bearing, especially since the noise is more pronounced after you let off the gas.

Maybe some kind of major misfire but I think your engine shit the bed...
 
thegipper said:
was going to say rod or rod bearing, especially since the noise is more pronounced after you let off the gas
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This was my first thought, same thing happened to my 2nd gen with 198k. Wish I had better luck with these rigs. Local guy has a rollover with 145k, probably just do the swap, I rarely drive this anymore.
 
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You can check the oil on the dipstick or drain the oil and inspect for metal glitter in it. If there are metal sparkles in the oil, the engine is toast.
 
Looked at the rollover today, ran great, was in the guys shop, all of the sudden a billowing cloud of white smoke began to come out of the exhaust... The brunt of the damage was to the front passenger side. Guessing the head is cracked... He said he was going to cut the exhaust and see if the water was in it. I told him good luck.
 
thegipper said:
Did you check the oil on yours yet? Any metal glitter in it?
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Not yet. Haven't had much time. It's in the street right now because of room remodeling, using garage to paint trim. I pulled the plugs last night, cylinder one was oil fouled badly. Going to check if the bearing is shot while I have the plugs out, but that's for tonight or tomorrow.
 
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If you don't want to drain the oil you can just start it up for 20 seconds and shut it off. Then check the oil on the dipstick, if the rod or rod bearing wen't out, you'll see the glitter on the oil dipstick.

Good luck either way
 
thegipper said:
If you don't want to drain the oil you can just start it up for 20 seconds and shut it off. Then check the oil on the dipstick, if the rod or rod bearing wen't out, you'll see the glitter on the oil dipstick.

Good luck either way
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Didn't notice any glitter. Put new plugs and wires just for giggles. I'm approaching 100% on rod bearing. Does not knock at idle or under load, but runs rough as crap and knocks coming off high rpms. Keeping my eye out for an engine.
 
Black 99 289k milesOn a side note, this guy is across town, think this is a gamble? Says he has kept it well for 10 years, he put 30k on it last year alone. Not sure what I could part mine out for or sell outright, but may be cheaper than an engine and the time to swap. Thoughts?
 
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