water pump, head bolts on 90 accord EX
05-16-2006, 12:21 AM
#16
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> Your post was very informative, thank you. I think the spark plug
> seals will come as part of the head set since it comes with a valve
> cover.
>
> I have two questions.
>
> What is the difference between the Felpro and Honda gasket? I have
> used Felpro in the past with good results, but not a MLS type. Is that
> where the complication comes in? I hope
"hope"??? why are you having it machined at all??? is it warped? and
you should check by looking at other examples to see if they can do the
job properly.
fyi, valves don't burn because of leaking seals - they burn because they
were damaged, defective or the lash was allowed to become too tight. if
this shop told you a seal caused this valve to burn, you may want to
consider taking this head elsewhere for a second opinion. better yet,
just replace the valve yourself, put the head back on as-is, and drive
it for another 300k miles.
> the shop gets the surface
> finish right because I have heard it is touchy on those.
yes, it sure is.
>
> Also, is there a specific reason why running a die over the head bolts
> is a bad idea?
yes. threads are rolled which makes them fatigue resistant. cut
threads, or threads that have been "cleaned", get minute score marks in
them which can initiate fatigue. thermal cycling in the engine fatigues
bolts real quick if they've been damaged like this. just wire brush
them, if they need cleaning at all, and re-use.
> Other than that, your notes about preparing the block
> and torquing are right in line with my own experience.
>
> Your post was very informative, thank you. I think the spark plug
> seals will come as part of the head set since it comes with a valve
> cover.
>
> I have two questions.
>
> What is the difference between the Felpro and Honda gasket? I have
> used Felpro in the past with good results, but not a MLS type. Is that
> where the complication comes in? I hope
"hope"??? why are you having it machined at all??? is it warped? and
you should check by looking at other examples to see if they can do the
job properly.
fyi, valves don't burn because of leaking seals - they burn because they
were damaged, defective or the lash was allowed to become too tight. if
this shop told you a seal caused this valve to burn, you may want to
consider taking this head elsewhere for a second opinion. better yet,
just replace the valve yourself, put the head back on as-is, and drive
it for another 300k miles.
> the shop gets the surface
> finish right because I have heard it is touchy on those.
yes, it sure is.
>
> Also, is there a specific reason why running a die over the head bolts
> is a bad idea?
yes. threads are rolled which makes them fatigue resistant. cut
threads, or threads that have been "cleaned", get minute score marks in
them which can initiate fatigue. thermal cycling in the engine fatigues
bolts real quick if they've been damaged like this. just wire brush
them, if they need cleaning at all, and re-use.
> Other than that, your notes about preparing the block
> and torquing are right in line with my own experience.
>
05-16-2006, 11:02 AM
#17
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
All the exhaust valves were pretty bad. The way it was explained to me
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
05-16-2006, 11:02 AM
#18
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
All the exhaust valves were pretty bad. The way it was explained to me
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
05-16-2006, 11:02 AM
#19
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
All the exhaust valves were pretty bad. The way it was explained to me
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
is that the oil leaking down the valve stem accumulates on the seat
eventually preventing the valves from completely transferring heat to
the seat. Is that wrong?
All the "hoping" is because I had to use a new machine shop due to the
location. I think I will give them a call and remind them not to mess
with the finish on it. The gasket was not blown so there seems little
reason to mess with it especially given the risk.
05-16-2006, 10:09 PM
#26
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
05-16-2006, 10:09 PM
#27
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
05-16-2006, 10:09 PM
#28
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
> All the exhaust valves were pretty bad. The way it was explained to me
> is that the oil leaking down the valve stem accumulates on the seat
> eventually preventing the valves from completely transferring heat to
> the seat. Is that wrong?
yes. oil burns off the exhaust valves in a jiffy. carbon also. if the
valves aren't seating it's because they've been bent or the valve lash
is insufficient. in the old days, exhaust valves didn't even have seals.
>
> All the "hoping" is because I had to use a new machine shop due to the
> location. I think I will give them a call and remind them not to mess
> with the finish on it. The gasket was not blown so there seems little
> reason to mess with it especially given the risk.
>
05-16-2006, 10:10 PM
#29
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> Oh, and am I off the mark, or is this motor a strange case - where you
> have an open deck motor, but the head bolts are not torque-to-yield
> type meaning they can be reused?
>
if they're not torque-to-yield, they can be reused. open deck has
nothing to do with it afaik.
> Oh, and am I off the mark, or is this motor a strange case - where you
> have an open deck motor, but the head bolts are not torque-to-yield
> type meaning they can be reused?
>
if they're not torque-to-yield, they can be reused. open deck has
nothing to do with it afaik.
05-16-2006, 10:10 PM
#30
Guest
Posts: n/a
Re: water pump, head bolts on 90 accord EX
runderwo@mail.win.org wrote:
> Oh, and am I off the mark, or is this motor a strange case - where you
> have an open deck motor, but the head bolts are not torque-to-yield
> type meaning they can be reused?
>
if they're not torque-to-yield, they can be reused. open deck has
nothing to do with it afaik.
> Oh, and am I off the mark, or is this motor a strange case - where you
> have an open deck motor, but the head bolts are not torque-to-yield
> type meaning they can be reused?
>
if they're not torque-to-yield, they can be reused. open deck has
nothing to do with it afaik.