where the cams sit in our heads what happens after the aluminum that supports them wears down? do the make cams that are bigger to accomadate the larger circumference? do they weld and then hone? or does the head just become useless? cause the last time i checked we dont have cam bearings

 

? bump

 

You are correct, there are no cam bearings. It doesn't happen too often, as there is usually plenty of lubrication to keep any significant wear from happening, but I think that if the cams have worn enough to have the clearance become an issue, it's time to take another look at things. Why is it worn so much? Is this a golden head that cannot be replaced? I don't think it would be worth it to weld and hone new caps and all that, and it would probably still have problems. Honda has very good stuff from the factory. And no one makes oversize anything for the cams.

Hopefully this is a hypothetical question, you aren't about to post clearences on the cams being way out of whack...

 

"And no one makes oversize anything for the cams."

guess youve never worked on any push rod v8's.....i was comparing ideas with a well known engine builder of domestics and we got into theory specs tech on heads since he wasnt real familiar with vtec.....started getting in longevity questions because he was always impressed with how long honda engines would run for....when it came to cam setup we were far apart on the longevity level....he just couldnt understand that they dont make oversized cams or the head not have cam bearings....if anyone could explain better to me about how the aluminum wears down that holds the cams in place i would like to know also...oil doesnt stop 100% of wear...so eventually the head will be useless

 

bump

 

look into the quality of the head castings of Japanese vs. Domestic. you will notice a huge difference in materials

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by integrator43 &raquo;</TD></TR><TR><TD CLASS="quote">look into the quality of the head castings of Japanese vs. Domestic. you will notice a huge difference in materials</TD></TR></TABLE>

i know this...but still doesnt answer my question

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 2k.civic.si &raquo;</TD></TR><TR><TD CLASS="quote">guess youve never worked on any push rod v8's</TD></TR></TABLE>

Well, you guessed wrong. And I was refering to Hondas, as this is Honda-Tech, not V8-Tech.

Regaurding the wear, you are right, oil doesn't stop all the wear. But my point is that with the surface finish of the cam journals and the excellent oil system the Honda motors have, you have significantly less wear than a shitty V8. You are correct in saying that evenually the head will wear enough to cause a problem. I'm just telling you that it will be SO long before they wear that you will have too many other things to worry about. Look at how many Honda go over 300,000 miles. There are plenty that go way more than that. The last thing I would worry about is whether the cam journals are wearing. If they are showing excessive wear, not only do you have a worthless head, but you also have another problem to find.