I have a 2004 DC Tundra Limited with 51,000 miles. I recently noticed a ticking sound coming from the drivers floor board area while applying acceleration. The noise is not noticeable during idle, rather while the vehicle is in motion and a load on the engine You all know how the Toyota motos kinda ticks like a sewing machine, well, its like that noise but only louder. I recently took it to my local dealer and they replaced the factory gasket which connected my stock pipe to my Borla Dual exhaust ($65). Needless to say that did nothing to eliminate the noise. The ressonator has been removed from my truck exhauset system and a piece of stainless welded in place by my mechanic neighbor. The toyota mechanic said that there is a small leak in the weld and it needs to be tacked over. They are beating around the bush with me. I have the Toyota Extra Care Warranty and I called them and they told me that exhaust manifolds and gaskets are covered by my warranty. I contacted the toyota mechanic and he said that once I get the small leak tacked over and the noise is not eliminated, then he would order a new manifold and gasket for the drivers side. I heard that the 4.7L earlier tundras were bad about leaking exhause manifolds. Its got me stumped as to why the noise is only heard while driving and applying acceleration and going up hills. My truck is well maintained, garage kept and service done on specs. To me it sounds as there is an exhaust leak.
Ok, once I get the small pinhole fixed and the noise is still there, should I procede with a new exhause manifold and gasket? I mean what else could be causing this noise. It had him stumped because he does not hear the noise it on a cold start, but he said there could still be a leak or crack, they just never tore into it to see whether or not it had one.
Your extended warr already has an open ticket on this item, it shouldn't be closed by the service writer until it gets resolved. That's been my experience with ext warr service/repairs. This is good becuase it's documented now. So whatever you do in the meantime won't effect the outcome of that ticket.
Get the known leak that the technician found repaired. Then have the same tech take a second look. He's got SOP diagnostics to follow, so if it's there, he'll find it. If he can't find a leak, the last resort is to R&R the manifold. And in that case, you at least get a new exhaust manifold and gasket installed. Which is going to be better than the 5yr old equipment currently on there. AND it'll be free due to the warr coverage. When I replaced my manifolds with new headers, I found the driver's side exhaust manifold was all gnarled up around the collectors... almost like it was incorrectly casted from the factory. But I'd never have known unless I replaced them.
Another thing to consider, if they go in and find another problem or break something during the R&R of the exhaust manifold, it too will be replaced under warranty. Think broken studs or other exhaust related hardware.
I say go for it. The only thing you're paying for is the possible leaking weld in the catback, right? (and the inconvenience of not having your truck for a couple days)
Good luck man. Hope you get it all sealed up.
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My Truck: 2005 Tundra, 2UZFE. 4WD. AccessCab. Spectra Blue Mica (8M6). TRD. AT. CC. CK. DZ. FE. AW. LD. OF. TO. VP.
Thanks for the feedback. I am just curious as to why the noise I am hearing is not while the vehicle is idling. The mechanic said that you should be able to hear the noise (exhause manifold leak) on a cold start. I only hear the noise when drving and the engine is under a load. What else could this be? I hear the noise coming from the drivers floorboard area.
there is a gasket that is on the steering column where it goes thru the firewall. less than 15.00 at dealer ship and 20 mins to replace. the rubber boot gets old and tears and allows the noise to come up into the passanger compartment. check that out. make sure you put some silicon based grease on the boot when you install the new one. and grease the shaft so it doesn't stick to the shaft while turning. this simple boot keeps alot of noise out and what may seem like a major noise but it is the sewing machine running a highr rpm so it sounds really bad. hope this is all that is causing you the greif.
there is a gasket that is on the steering column where it goes thru the firewall. less than 15.00 at dealer ship and 20 mins to replace. the rubber boot gets old and tears and allows the noise to come up into the passanger compartment. check that out. make sure you put some silicon based grease on the boot when you install the new one. and grease the shaft so it doesn't stick to the shaft while turning. this simple boot keeps alot of noise out and what may seem like a major noise but it is the sewing machine running a highr rpm so it sounds really bad. hope this is all that is causing you the greif.
Thanks for the feedback. I will check out the boot and see. I will mention it to the Toyota Mechanic as well. I am still leaning towards an exhaust manifold leak. The dealership is supposed to replace the drivers side (this side is where the noise seems to come from) gasket and exxhause manifold and if that dont work, they are going to replace the passengers side as well.
I had a 2000 TRD off road 4x4 with the exact same problem. It started the ticking sound at about 48000. The toyota dealer fixed it with new gaskets in the exhaust manifold. They fixed it so well that 100,000 miles later; no ticking! This is a common problem with the 4.7 engines and can't figure out why Toyota did not address it earlier.
Well I took my truck to another dealer 30 mins away and told them what has all transpired with the other dealership. The mechanic took the vehicle around the block and inspected underneath and told me that it the exhaust manifold/gasket on the drivers side. He said it was a pretty big job (7-8 hrs), and thats probably why the other dealership was dragging their feet. He said it was a no brainer and that the other dealership should have picked right up on it. The dealership is ordering me a new exhaust mainfold and gasket and will be in this week. I am dropping my truck off the night prior and they will have it for a day.
I took the truck in on Monday (13th) evening for the dealership to have it all day on Tuesday (14th). I called them around 11 o'clock yesterday and was told that they were having problems removing the bolts from the manifold into the block. He said they are using a torch and some pentrating fluid and are trying no to break any off. He said it should be finished tomorrow (which is today).
I guess this is a common problem on removing these bolts. We will see what happens this afternoon when they call me back. I will keep you all posted
I got my truck back from the dealership and the noise was still there after the manifold and gasket replacement. I talked to the mechanic and he told me that there was signs of exhaust leakage so it was a proper fix, but the noise he said was probably due to the injectors. He said these older 4.7L engines were noisy. I had the resonator cut out of my exhaust when I added the Borla Duals, I wonder if this might be letting more noise travel through the engine bay? I was told by the mechanic to add a quart of ATF to the gas and see what happens. I am going to drive the truck for a week or so and go from there. I stopped by an old retired Toyota mechanic the same day I got the truck back and he climbed underneath and looked at everything, he told me not to worry about the noise and that he found nothing to be wrong with the engine.
Find the where the vertical steering shaft goes into the housing mounted on the firewall and look up into it from beneath the truck. As mentioned above the rubber seal is probably torn. Every tundra needs one eventually.
Find the where the vertical steering shaft goes into the housing mounted on the firewall and look up into it from beneath the truck. As mentioned above the rubber seal is probably torn. Every tundra needs one eventually.
This. I was certain I had a cracked manifold and when I pulled mine off they were perfect. My sound is coming through seal mentioned above. Also, you should have ordered headers instead of letting them put on another stock manifold. Ask to see your manifold to see if its cracked, other wise the dealer put one over on you.
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04 TRD AC 4X4,JBA headers,True Flow intake w/K&N drop-in, Spintech Sportsman Street XL muffler, NGK TR6ix plugs, new Denso 234-4209 o2 sensors,Mobil 1 Syn 0W-40
Exhaust Mainfold leak help
I had a 2000 TRD off road 4x4 with the exact same problem. It started the ticking sound at about 48000. The toyota dealer fixed it with new gaskets in the exhaust manifold. They fixed it so well that 100,000 miles later; no ticking! This is a common problem with the 4.7 engines and can't figure out why Toyota did not address it earlier.
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