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Wear on exhaust cam lobe

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astrozombies

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Honda
Hi everyone,

I just finished setting the valve clearances on my 2004 2.0 Petrol tourer. Whilst at it I noticed that one of the exhaust cam lobes has some wear (the others all look fine).

Car seems to run fine and quietly, but should I be worried? It is on cylinder 4 if that makes any difference. The car has done 107k

Here are some pictures:

P1060021_zpscfa21edd.jpg


P1060023_zps082520ce.jpg


P1060024_zps95e81bb4.jpg
 
Does it look like it's been striking the hydraulic lifter? What's the condition of the lifter? Is it pitted?
 
That looks like the case hardening of the camshaft is worn, I have seen this before on cr-v's. What will eventually happen is the cam lobe will wear away until there is nothing left of it, the valve won't open and you will get a misfire code stored. I haven't seen an accord do this yet though. If I remember there was a bulletin from Honda about 10 years ago regarding this.
 
Oh dear, that doesn't bode well for the longer term prospects of the cam. Something isn't right that's for sure, either dirt or something else is causing the wear. I've seen these K20s with over 200K miles without that sort of wear.

Problem is that it's probably not use the cam but the valve that would need replacing. That means removing the head and that's a whole other exercise.

Personally, I'd drive it until it gave me tangible problems and address it then.
 
The hardface is gone ,it's time is nearly over , I would be trying to source another one while I am already ferking about with clears and settings rather than have to open it up again . Or button it up as is and start looking at the ebay for the next car , and get that one ready for selling .
 
Also you may want to replace the timing chain, they can stretch and bring the eml on with camshaft correlation dtc.
 
camshaft replacement can be done at home, but you need to know what you're doing, as it needs to be set up correctly. As Paul implies, you have to remove the chain too, which means accessing the side of the engine. As he says, might as well replace the chain while you're at it.

Valve replacement requires the head to be removed.
 
I see... Torn between flogging it now before issues arise, or carry on running it and start looking for a replacement engine / camshaft.

Glad I decided to do the valve clearances either way, wouldn't have known otherwise!

Is there any way to see if the valve will need replacing too?

Thanks for the advice btw, much appreciated!
 
astrozombies said:
Is there any way to see if the valve will need replacing too?
Click to expand...
I think you'd have to lift the camshaft out of the way.

Maybe someone else who's worked on the 2.0 engine can give better info than me on this
 
To fully inspect the valve ideally remove the head then valve and seat can be inspected. If you've got one of those inspection cameras you could poke it in the exhaust port to get an idea what it's like. Finally do a compression test. That will give an idea of the state of the engine.
 
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