<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">

seen that thread long time ago. i don't think the change in oil additives recently affects Honda's that much. there are millions of Honda's on the road all ranging from stock to aggressive valve train components. if the oil additives had such a big impact on wear we would be seeing ALLOT more issues like this rather than a few isolated cases.

like i said.....i had bad/sticking LMA's on my exhaust side only and the wear on my camshaft was on the VTEC lobe of the exhaust cam only....once i replaced the LMA's, cams and lifters everything was fine......heck i even used the cheapest engine oil from walmart and the cams do not show the same wear like before.

lets face it.....all our old *** b16/b18 heads are starting to show their age. components wear out over time.....time to carefully inspect everything and replace as needed.

good luck. </TD></TR></TABLE>

explain me how the bad LMA could do that

explain me how to check the LMA and see if there is a problem

 

a bad/sticking LMA will cause the lifter to "smack" the camshaft lobe rather than follow it as it rotates causing wear overtime.

to check. simply press down on the vtec lifter with you finger and slowly release it...it should release smoothly. if it sticks while you lift your finger off then it's no good.

also if the LMA seems "weak" not applying enough tension on the lifter it can cause the same problem.

hope that makes some sense.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by non-VTEC &raquo;</TD></TR><TR><TD CLASS="quote">a bad/sticking LMA will cause the lifter to "smack" the camshaft lobe rather than follow it as it rotates causing wear overtime.

to check. simply press down on the vtec lifter with you finger and slowly release it...it should release smoothly. if it sticks while you lift your finger off then it's no good.

also if the LMA seems "weak" not applying enough tension on the lifter it can cause the same problem.

hope that makes some sense.
</TD></TR></TABLE>

I know this, that's a common problem on 90-91 head

On the 2 head I had wear problemes, the LMA are OK

 

I'm sure you probably checked already, but are the sliders in the rockers stuck ? Maybe its staying in vtec alot of the time on the cylinders. I am just throwing out some ideas

 

2 things...

1. You have way to much valve spring for those cams.

2. There is a little dowel pin and o-ring in the center of the head that is often left out during
"rebuilds". If left out, rapid wear will occur when oil pressure is diverted out of the cam journals and into the rocker shafts to lock up VTEC.

Food for thought.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Combustion Contraption &raquo;</TD></TR><TR><TD CLASS="quote">2 things...

1. You have way to much valve spring for those cams.

2. There is a little dowel pin and o-ring in the center of the head that is often left out during
"rebuilds". If left out, rapid wear will occur when oil pressure is diverted out of the cam journals and into the rocker shafts to lock up VTEC.

Food for thought.</TD></TR></TABLE>

1: with B16A cams the wear don't occur

2: do you have a picture of it?

 

023 PIN, DOWEL (8X10)
024 O-RING (8.8X1.9)

 

the oil without zinc problem

http://www.jaylenosgarage.com/...98306

 

rocker pads hardness ftw

send an IM to DonF.

 

http://www.mobiloil.com/USA-En...e.pdf

i found this, anything with over 800ppm phosphorus is the same as the old oils


Modified by dbiker207 at 11:54 AM 6/7/2008

 

I cannot tell clearly from the pictures, but is the groove on the VTEC lobe across the journal (parallel to the camshaft length)? If so, a weak LMA is a likely culprit. It would allow for the VTEC rocker to seperate from the cam lobe and essentially crash into it.

Perhaps you could highlight the wear in one picture.