I will put my money on a rod bearing or a wrist pin

Same problem with jakub2000

I am sure the tech meant unplug the coil one by one while it is running to Isolate the cylinder .

Depending how bad the failure is ....It is possible you damaged the cylinder. The tech just needs a borascope to look down into the cylinder to see if the pistons are scuffing . He will have to pull the pan to check the bearings .


I just had a other shop call mine this week on a K20 motor to take a listen to . Sounded like someone was pounding on the head with a 20lb hammer . Unplug the coils problem gone . He doubted me that it was the rod bearings because it sounded like it was in the head . He pulled the pan and saw all the bearings were wrecked .

 

well honda told me i have to bore out the cylinders. And the other guy who is a tech at honda came to my work place to eat and i asked him about my car and he said there is no way that honda would tear apart my motor to take a look at the head to see if it was damaged because thats not part of the 20 point inspection or whatever.

yeah i tried pulling out the coils while the car was running, one by one and it didnt stop the knocking one bit. i tried pull the sister coils out both at a time every combo. i guess i'll try taking out the oil pan and taking a look from underneith sometime soon.

 

How much can you bore out an f20 cylinder? Aren't the cylinders lined with Fiber Reinforced Material?

 

not sure maybe thats why honda told me to replace my motor -.-"

 

I think this qualifies as the best retort I have ever read on S2ki.

 

well its been said that, honda in hawaii has one of the worst customer services . When i tried to ask them which one was the problem cylinder, they said they couldn't release the information. they told me I would have to get it "repaired" at honda to obtain that information. all they told me was that i either buy a new motor from them or i just send my car to get the head machined and pistons bigger.

which is why the honda guy who came in to eat at my work place told me that they were bullshitting me and that its not included in the 20 point inspection stuff, for them to take apart the head to take a look at the cylinders with that microscope stuff would take an extra 2 hours.

 

yes. you can only bore the cylinders a little so you can add oversize (rebuild) pistons. You can't bore it to add any displacement.

Also, I think whoever does the boring (IF you even need to) should have experience with the FRM cylinders. It's not the same as doing cast iron, which just about every other car has.

 

With everything plugged back in . Unplug the 2 can sensors on the back of the valve cover . This will stop the injectors and coils from firing .

Now crank it .

Whats it sound like ?


Usually worn rod bearings will make no noise when cranking the car , As the bearing just rides the crank around on its rotation . **Unless the damage is major **

When the car is running you have combustion force . The crank is already rotated so it is riding the bottom of the bearing pulling the rod down the the cylinder fires and pushes the piston and rod down taking up the slack that was on top of the crank journal smacking the upper bearing .

 

thanks for your help i'm goona try that next thing tommorow morning.

 

i upluged the 2 can sensors on the back and i started the car and it made the regular cranking noise. So that means that my rod bearings are still good? what else could be making the noise? Or do i have to actually bore out my cylinders?