I have a 2000 Acura 3.2 TL with 135,000 + miles. At around 80,000 miles I began to notice a slight tic in the engine which the Acura mechanics said was normal. (I'm an old farm guy. These sounds in an engine are not normal) As time has passed, the noise has gotten louder. The last time I took it to the Acura mechanic he said he thought it may be that the valves needed adjusting. He did so but that effort did nothing to fix the problem. To me the sound is deeper in the engine. The mechanic said maybe a wrist pin is causing it. My question is this: What will be the probable action to solve this issue? Engine tear down? Rebuilt engine? What would be the probable cost
Country: United StatesMake: AcuraModel: 3.2 TLYear: 2000Engine: 3.2
Two attempts to get an Acura mechanic to diagnose and fix have not worked. Valves have been suspected, adjusted without any effect.
Hello I would be happy to assist.
Please tell me when you first started to notice the tick? How long ago/
It has been at least 3 or 4 years ago. At first a light tick but as time has gone on (50,000 miles put on since starting to hear) it has become louder. For a long time the tick would become undetectable after engine warm up but not now.
Have you ever had the timing belt replaced?
Sorry, I just want to ask you a series of questions before I give you my thoughts,
Yes. That and the water pump, serpentine belt were replaced at 102,000 miles.
How long ago was that?
At least 2 1/2 years ago
Okay, have you noticed a decrease in engine performance as the tick has gotten worse? Do you have any malfunction idicators on ie: Check engine, Transmission light?
No. Engine runs fine. Doesn't seem to have lost any power. Check engine light or transmission light not illuminated. The last time I had the car checked, about a month and a half ago, they told me I needed two motor mounts replaced but indicated that was not the cause of the noise. I have not done that yet because I want to find out if it will be worth it. That alone would cost about $500.00
Right an engine tick would not be caused by a bad motor mount.
Does us sound more like a tick or a rattle?
It's a tick. About the same rhythm as the crank shaft or possibly a little faster. Definitely not a rattle.
Okay, first thing is that these engines are a bit noisy, even back to the orginal 3.0 V6 in the Vigors, they all seem to have a tick. Which if you are not noticing any performance problems I would nt be too overly concerned.
If the sound has gotten progressivley worse than that raises an eyebrow.
Ticking noises would not typically be cause by a bad wrist pin
You would expect a rattle with a bad pin, which would be caused by the piston skirts hitting the cylinder walls. I dont believe this is the case in you r situation
I would focus more on the cylinder heads.
From my experience the cause can be one of a few things, if the valve adjustement was dont properly you need to ask you mechanic if any of the lock nuts were too tight or unajustable. This could be signs that you have a sticking valve, meaning that the rockers are hitting the top of the vlave at th wrong time due to gunk or lack of lubrication in the cylinder head.
So my first suggestion for you todo is purchase a good engine treatment, have an engine flush done.
After the oild change add a little bit heaver weight oil maybe 10W 40, and add LUCAS engine treatment,
Drive it for a few days an see if you notice any difference, If not I would go to step two.
My second suggestion is to ask your mechanic if he replaced the tensioner when doing the water pump. If you have an undertensioned timing belt the timing may be off half of a tooth which will cause a tick, a loud one. Which Im hoping is not your case here. If we can prove the timing belt was not set properly and tensioned you may have some recourse to the last mechanic that worked on the vehicle
Do you have any questions thus far?
Immediately after the timing belt replacement, I drove the car heavy and steady for about 3000 miles (trip). Nothing seems to have increased to any noticeable amount then. I'm thinking if the problem was an effect of the work on the timing belt replacement etc. that it would have surfaced long before now. no?
Possibly, remeber though the timing belts stretch over time, so it is not unheard of that the belt needs to be looked at again , especially if the tensioner was not replaced
Ok. I'll have to consult with Acura and the paper work I kept regarding the TB replcmnt. Other than that, I'll take your suggestion and have the engine flushed and try a heavier oil and Lucas treatment.
The last suggestion is that you have a bad/bent valve, and need to have the cylinder head reworked. At this point I wouldnt waste you time rebulding the engine, I woudl simply replace it with a used one. You will save more money and most used engine will come with a warranty.
I have seen them sell for between $1000-$2000, and you are probably looking at $1000 for labor to install
What about replacement of the cylinder head(s)? About half that?
I wouldnt reccomend at this point, it will only be more costly, Removal of the cylinder heads, the labor, then you need to have them reworked, with ne valves springs retainers, keepers, then at that you could have a bad cam that has gotten worn due to possible lubrication issues. I have always reccomended engine replacement start from a clean slate.
It will be less costly
At this point its up to you, do you want to pour 3-4G into this vehicle?
Try my first suggesttion, if that doesnt help I would go with the options I provided, and worst case, sell the car AS IS get what you can for it, probably 4-5K
Or just drive it till you need to purchase a new engine,.
If its running fine, leave it be
OK. Your estimation of the cost of a rebuilt/used engine is much cheaper than I thought it would be, even with the labor. I'll take your first suggestion and see where that leads me. Thanks for your advice.
Anytime, be sure to shop around for an engine before you purchase.
shouldnt be more than 12 hours of labor, which at $100 an hour your looking at about 1200
Be sure to Accept and feedback is appreciated
Best of luck, and feel free to reach out and let me know how you make out
ASE Certified Honda/Acura Specialist