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| Catalytic converter or rod knock So I stopped and looked at a mega cab diesel yesterday and when I walked past the passenger side of the g I heard this faint rattle. No big deal, I had just been up to my father new house which has a long gravel road to get there. Figured a rock had flow up in the heat shield again. Well last night about dinner time I picked up my daughter at day care and you can really hear it now. When idling it sound like a rod knocking, clang clang clang clang clang but when you bend down to listen it sounds like its coming from the catalytic converter or “after cat” thingee. Anyway any of you had this problem. Im 99.9% sure it the cat. I have been 120 miles from last night until this morning. I know MB makes grate motors but I don’t see the old G living with a rod that sounds like this  Thanks Shawn. | ||
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| Brent Expert Date registered: Apr 2006 Location: SW Colorado USA Vehicle(s): '13 Wolfsburg GTI Posts: 1754  | RE: Catalytic converter or rod knock I would guess that a failed engine is pretty unlikely. It is even less likely that you could drive 120 miles with a failing bearing, though it is possible. Does the noise change when the engine temp cold or warm? Sometimes a rod will be quiet until warmed up then start banging. Time to visit your freiendly MB service dept  BTW, I love my megacab. Great for hauling the kids, has the dvd entertainment system and rediculously huge rear seat. Gets better milage than your G500 too  (mega.jpg) Attachments ----------------  mega.jpg (94KB - 9 downloads) | |
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| Re: Catalytic converter or rod knock it gets louder when its warm! you cant hear inside the car driving just when it stopped. I had a jeep back in 97 that sounded like gravels where in the muffler. The dealer replaced the cat. the idea of the dealer ships again makes me sick. Knowing them i will new a new rear end or something crazy. lol... guess i need to call and make my list.. right now my only problems are. 1) window doesnt roll down. 2) widown doesent roll up once it decided to roll down, 3) sun roof only works half the time, 3) mirrors are now moving when i open the door, 4) wipers still wipe when you open or shut the door 5) hood does not open. 6) Navigation is lost. say get on road when your on the interstate 7) exhaust knock... I have a call to my dads friend in the next state over on a mega cab or just the crew cab. He has yet to call me back. I was thinking black on black, nav, diesel, auto 4x4, sun roof, Then make the wife mad, 5" exhaust, tst products computer, ( ads 580lbtq) built trans, and maybe a edge or DB turbo upgrade one day. Did you get a diesel or gas. | ||
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| Brent Expert Date registered: Apr 2006 Location: SW Colorado USA Vehicle(s): '13 Wolfsburg GTI Posts: 1754 | Re: Catalytic converter or rod knock KERR - 5/3/2006 8:40 AM I have a call to my dads friend in the next state over on a mega cab or just the crew cab. He has yet to call me back. I was thinking black on black, nav, diesel, auto 4x4, sun roof, Then make the wife mad, 5" exhaust, tst products computer, ( ads 580lbtq) built trans, and maybe a edge or DB turbo upgrade one day. Did you get a diesel or gas. Gas pick-ups are for sissy's  I have the mega and an '03 dually reg cab. Awesome trucks. Not sure about the cloth interior but in leather there are two choices, a lighter grey, which I have, and taupe, which I didn't care for much. My mega has every option but the nav, don't need it when my town has one paved road and no stoplights  BTW, you will not be adding 580 lb/ft of torque with a programmer. Remember you are starting with 610 lb/ft. With just a programmer, exhaust and intake you can get to around 800lb/ft. With a turbo, or twin turbos, injectors and maybe a cam change 1000-1100lb/ft is pretty attainable and reliable. Just keep in mind that built auto is going to be $4k, and a requirement to live with the mods. I have left all of mine stock. The power stock is pretty unreal IMO. | |
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| G4Garret Veteran Date registered: Apr 2006 Location: Oak Ridge - Knoxville - Windrock Tennessee Vehicle(s): 2000 G500, U1100, SLK350, LR 101, WC-63 6x6 Posts: 243  | ||
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| Re: Catalytic converter or rod knock its the cat for sure. i went by the local exhaust shop and the said "hit it with a hammer and see if it stops" if not you need to buy another cat. So i hit it a few times with the hammer and the sound went away. but its blowing the guts out the muffler now  its the second cat that was making the noise. | ||
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| G4Garret Veteran Date registered: Apr 2006 Location: Oak Ridge - Knoxville - Windrock Tennessee Vehicle(s): 2000 G500, U1100, SLK350, LR 101, WC-63 6x6 Posts: 243 | ||
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| BrentG500 Extreme Veteran Date registered: Apr 2006 Location: US, TX, Dallas Vehicle(s): 2004 G500 (gone) Posts: 449  | RE: Catalytic converter or rod knock Brent - 5/3/2006 6:54 AM Time to visit your freiendly MB service dept BTW, I love my megacab. Agreed and I do too.  | |
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| mb230s Date registered: Apr 2006 Location: SWFL Vehicle(s): G-less for now, vintage MBs, FJ40  | ||
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| Re: Catalytic converter or rod knock this is true, ill ask her today when i drop it off, Im sure they say that its caused by abuse or something like that. My dealer is never happy about warranty items. i cut the factory exhaust up a long time ago | ||
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| ewalberg Expert Date registered: Apr 2006 Location: Past: San Francisco. Present: Germany Vehicle(s): 2000 g500 Posts: 1887 | Re: Catalytic converter or rod knock Yeah, even the europa trucks are supposed to have 7 years and so many miles on some emission stuff... no idea how we'd collect now, but emission related items can be covered for much longer than others. Also, again, you've noticed it's from inside the cat, but for others sake i've had a cat exhaust hanger break and it sat in place and rattled, food for others. P.S. to bad those dodges are so damn ugly! | |
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| RE: Catalytic converter or rod knock lol... they are not the most beautiful truck out there. What i would like to have is a Ford F350 body, Mega cab length in the cab, cummins, motor, and real allison transmission with dodges old D70 front axle and Dana 80 rear axle.... Then the big fuel injectiors, comuter, twin turbo etc.... but i havent seen that on the order list | ||
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