Attention: TDR Forum Junkies TDR Members
I originally posted queries under Engine Noise a couple of months ago and the problem was finally diagnosed as #4 injector failure. This resulted in resleeving #4 cylinder and new piston & rings. The truck had 104000 miles on it & I am the original owner.
The shop which performed the repair is located in Hobbs, NM. I am over 100 miles away in Roswell, NM. The shop removed the engine, bored and sleeved the cylinder in place without removing the crank and reinstalled same, replaced ALL of the injectors with stock and delivered the truck to me.
4 days after delivery, I drove the truck to WA state pulling a 19 ft (empty) enclosed trailer. I thought the engine had a tick but decided that I was the only one hearing it. While there I had a "CHECK ENGINE" come on and transmission problems and drove up to DTT in Canada where they noticed the "tick" and scheduled the transmission repair for 5 days later. While waiting for that appointment, I check with a Cummins shop in Mt. Vernon, WA and they thought (after listening to the truck) I had an injector with a 'bad spray pattern' and not to worry.
DTT fixed the transmission and replaced the TPS which fixed the CHECK ENGINE lite and they made arrangements with a local diesel mechanic to come out and adjust the 'valve lash'. I decided to go ahead and upgrade to the Stage II injectors. Stephan installed the injectors and their diesel mechanic adjusted the valves. The valves were a bit out according to him. Upon starting the truck, the "tick" was still there. The mechanic at DTT thought it might be a wrist pin on one of the pistons.
I called the shop in Hobbs, NM and advised the owner of all the above. He said that it did not sound "castastrophic" in nature and to return to NM and let him listen to the truck. I loaded my trailer and did just that through some really bad weather the days right after Thanksgiving.
I took the truck to Hobbs, NM on December 11. We drove the truck and he told me that he had noticed the "ticking noise" when he delivered the truck but that it did not bother him as it seemed normal. We returned to his shop and cracked the injector lines. When #4 was cracked, the noise went away.
The owner had made arrangements for a Cummins mechanic to listen to the truck as well While we awaited his arrival, the owner told me that he thought the ticking noise is due to #4 cylinder firing 'harder' due to the increased compression. When the Cummins fellow arrived, he listened and subsequently agreed with the owner of the shop. They both said that this was normal and not to worry.
Obviously, I have now driven the truck over 4000 miles since the #4 cyl was overhauled. The noise is not loud but in the background when not under load. Under load, the noise seems to disappear and occurs again when releasing the throttle and coasting. I do notice the tick at idle. The explanation given to me by the repair shop makes sense and is probably logical. BUT I am not a mechanic.
I do NOT like the "tick" but am unsure of what to do next here.
I would appreciate some input and/or advice on this if anyone has had similar experiences. I apologize for the length but I think I got most of the story here.
I originally posted queries under Engine Noise a couple of months ago and the problem was finally diagnosed as #4 injector failure. This resulted in resleeving #4 cylinder and new piston & rings. The truck had 104000 miles on it & I am the original owner.
The shop which performed the repair is located in Hobbs, NM. I am over 100 miles away in Roswell, NM. The shop removed the engine, bored and sleeved the cylinder in place without removing the crank and reinstalled same, replaced ALL of the injectors with stock and delivered the truck to me.
4 days after delivery, I drove the truck to WA state pulling a 19 ft (empty) enclosed trailer. I thought the engine had a tick but decided that I was the only one hearing it. While there I had a "CHECK ENGINE" come on and transmission problems and drove up to DTT in Canada where they noticed the "tick" and scheduled the transmission repair for 5 days later. While waiting for that appointment, I check with a Cummins shop in Mt. Vernon, WA and they thought (after listening to the truck) I had an injector with a 'bad spray pattern' and not to worry.
DTT fixed the transmission and replaced the TPS which fixed the CHECK ENGINE lite and they made arrangements with a local diesel mechanic to come out and adjust the 'valve lash'. I decided to go ahead and upgrade to the Stage II injectors. Stephan installed the injectors and their diesel mechanic adjusted the valves. The valves were a bit out according to him. Upon starting the truck, the "tick" was still there. The mechanic at DTT thought it might be a wrist pin on one of the pistons.
I called the shop in Hobbs, NM and advised the owner of all the above. He said that it did not sound "castastrophic" in nature and to return to NM and let him listen to the truck. I loaded my trailer and did just that through some really bad weather the days right after Thanksgiving.
I took the truck to Hobbs, NM on December 11. We drove the truck and he told me that he had noticed the "ticking noise" when he delivered the truck but that it did not bother him as it seemed normal. We returned to his shop and cracked the injector lines. When #4 was cracked, the noise went away.
The owner had made arrangements for a Cummins mechanic to listen to the truck as well While we awaited his arrival, the owner told me that he thought the ticking noise is due to #4 cylinder firing 'harder' due to the increased compression. When the Cummins fellow arrived, he listened and subsequently agreed with the owner of the shop. They both said that this was normal and not to worry.
Obviously, I have now driven the truck over 4000 miles since the #4 cyl was overhauled. The noise is not loud but in the background when not under load. Under load, the noise seems to disappear and occurs again when releasing the throttle and coasting. I do notice the tick at idle. The explanation given to me by the repair shop makes sense and is probably logical. BUT I am not a mechanic.
I do NOT like the "tick" but am unsure of what to do next here.
I would appreciate some input and/or advice on this if anyone has had similar experiences. I apologize for the length but I think I got most of the story here.
