anyone know what could be causing the ticking noise on my cat motor...

besides valves....

to make a long story short as some of you have read along....
http://www.classadrivers.com/phpBB2/...ic.php?t=22468

after everything has been put back together i get a lot of ticking noise which wasn't noticeable before the rebuild...

could it be the rod bearings too, or does the valve just need to be readjusted???

the ticking seems louder on the passenger side of the motor...where the manifold is...i know the shop took off the manifold to troubleshoot what was causing the blow-by from previous mishap...

anyone experience any ticking noise due to crack manifold or manifold not being put back right i.e. torqueing of the manifold???

 

I see you got your CAT back together, been wondering how you made out on that.

If a valve is "ticking" the noise will be constant no matter the load on the engine. If you have an exhaust leak, the "ticking" will incerase/decrease according to load on the engine.

If you <u>even</u> think you have a problem, I'd contact the dealer that just did the work for advise ASAP. If he's done something wrong, it's his baby!

 

I have a similar problem on my 2004 Cat C15 Acert. It can be described as ticking/tapping sound, sort of like something you could hear if you grabbed a couple of pencils and started rattling them inside an empty mug. I did valve lash adjustment in June 2007 (it's Jan-2008 now) and it seems too early for valves to go out of adjustment. Cat checked the oil filter for debris but couldn't find anything... The noise is clearly heard when the engine is cold in the morning and I put it on high idle. When the engine warms up, the noise gets much softer. However when I run on the highway, the noise gets real annoying at around 1300 rpm and it constantly changes in volume: if I go uphill it gets louder, when I go over the crest of the hill and start down, the noise dies down. Somewhere here said it might be an exhaust leak, but I just did a Dyno at CAT where they checked everything and nothign unusual was found. They tuned fuel and horse power settings and the truck pulls okay... I understand the noise can be caused by practically anything - valves, pistons, bad bearings, lifters, exhaust leaks you name it.

I booked an appointment at Toromont CAT (I'm in Ontario, Canada) for tomorrow so that they checked this. I'll report here if the CAT guys find anything.

The truck is a 2004 International 9400 with 224,000 miles only. The engine has extended warranty till 500,000 miles.

 

yeah just a month ago another injector went out and this time wasted not time and money i went to a Cat dealer to get the injector replaced...

they told me i needed an overhead that some things were loose...
having not the time i told them i would come back shortly...

but funny thing is when i got the injector replaced the ticking noise died down to where you can hardly hear it....

i guess from now on i will not ever have small shops do my engine work never again...

 

That happened to us earlier in '07, did the check engine light test with CAT over the phone after the truck started running rough going up Elk in Wyoming, counted the flashes, delay then more flashes- that code told them we had a bad exhaust acuator, they said ok to run and by the time we were going up sherman on our way to Wyoming Machinery Cat Dealer we messed up the head, needed to replace 3 injectors, and replaced the head when all was said and done. It all started with a ticking sound several days earlier heading towards Seatttle, so the check engine light/ using cruise control switch might give you some information that could save you a major breakdown. Good Luck!

 

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My visit to CAT produced no results ... They did top set again (valves and injectors adjustment), replaced a defective actuator under the warranty and the ticking/tapping is still coming from the engine. I later found a loose clamp on the exhaust manifold and they promised to fix it under warranty (you have to take the turbo off in order to get to it). I did a temporary solution in a way of sticking a metal piece under the clamp to make it tight again. Ticking/tapping in the engine remained, but the metallic tone I heard before is gone. Now if only I could find the culprit causing this ... The suspects are: the A/C compressor (ticking inside); another clamp on the exhaust, the damper, or maybe something is wrong with bearings inside the turbo?

I don't know ... I'm going to CAT again to have them fix the clamp. Will ask them to look into the noise again

 

[quote="tracer"]My visit to CAT produced no results ... They did top set again (valves and injectors adjustment),


valve/injector adjustment has to be pretty far out of wack to cause a ticking noise...

replaced a defective actuator under the warranty and the ticking/tapping is still coming from the engine. I later found a loose clamp on the exhaust manifold and they promised to fix it under warranty (you have to take the turbo off in order to get to it). I did a temporary solution in a way of sticking a metal piece under the clamp to make it tight again. Ticking/tapping in the engine remained, but the metallic tone I heard before is gone. Now if only I could find the culprit causing this ... The suspects are: the A/C compressor (ticking inside);


A/C compressor is NOT the culprit, the pump does not rotate unless the magnetic clutch is engaged

another clamp on the exhaust, the damper, or maybe something is wrong with bearings inside the turbo?

I don't know ... I'm going to CAT again to have them fix the clamp. Will ask them to look into the noise again [/quote

 

[quote="bob h"]

 

well, i'm back from the cambridge (ont.) cat ... they fixed the loose clamp on the exhaust manifold and said they had to replace the seal UNDER the clamp ... it was a big job because you have to dismantle the turbo to get to the clamp. evidently there was an exhaust leak because of all these loose connections and they fixed that. i only drove about 15 miles (back to the yard) with the new clamp but the ticking noise seems to be gone. i will have to see if it's gone totally (like when I'm pulling a fully loaded trailer) ... cat charged me only around 300 bucks because i have an extended warranty on this 2004 engine so, what i learned from this is: when you hear any weird sounds from the engine compartment, first check to see if there are anything loose near the exhaust.