|
|
|
|
| Author |
Message |
Guest
|
Posted: Mon Nov 05, 2007 8:22 am Post subject: Ticking valves/stuck lifter? |
|
|
I guess you could call this part 3 (hopefully the last!) of my Escort
saga for those of you who have been following. For those who haven't,
I have a 96 Ford Escort 1.9L that overheated and burnt a valve.
Replaced the head and head gasket and its running again. Only issue
now is that I have some sort of ticking going on that changes with
RPM. It's most noticeable at idle - as I rev the engine the noise of
the engine makes it harder to hear. The ticking doesn't appear to
increase in sound, only in speed.
Initially I had a very loud clanking/ticking when I first got it going
again. I pulled the valve cover and found the #3 exhaust rocker arm
had come off. The rocker bolts weren't torqued properly by the shop
that built the head. I torqued all rocker bolts down to 20 ft-lbs per
the Haynes manual. The loud clanking/ticking was gone, but now I had
a quieter ticking (still very noticeable) that changed with RPM. It
is loudest when first starting the engine, then it quiets down a
little. Once the engine is warm and I'm stopped at a light or
something, it seems to be intermittent (tick tick tick [pause] tick
tick [pause] tick tick tick etc.)
Tonight I pulled the valve cover off again and compared everything to
the old head. I found that the round clips that go over the lifters
wiggled easily, whereas those on the old head didn't. I swapped out
the clips and the bracket that holds them down. I made sure I torqued
all rocker bolts down to the right setting, rotating the crankshaft to
take the pressure off the rocker/springs (valve closed) as I tightened
each. When I restarted it, the ticking seemed to have disappeared,
but after it warmed up and I reved it a bit, it was back.
I'm kind of lost as to what to try next. I did notice that the
lifters on the old head could be pushed down and spring back up, while
those on the new head seemed solid. I would assume this is because
the ones in the old head had leaked down and lost their oil - but I'm
not too familiar with all this. I could try swapping the new and old
lifters, but thats about the last thing I can think of. Is there some
kind of oil additive to treat a condition like this, assuming it could
be stuck lifter?
Thanks,
Doug |
|
| Back to top |
|
 |
|
|
Rodan Guest
|
Posted: Mon Nov 05, 2007 12:53 pm Post subject: Re: Ticking valves/stuck lifter? |
|
|
<kb1jec@gmail.com> wrote in message news:1194229342.921400.142210@y42g2000hsy.googlegroups.com...
I guess you could call this part 3 (hopefully the last!) of my Escort
saga for those of you who have been following. For those who haven't,
I have a 96 Ford Escort 1.9L that overheated and burnt a valve.
Replaced the head and head gasket and its running again. Only issue
now is that I have some sort of ticking going on that changes with
RPM. It's most noticeable at idle - as I rev the engine the noise of
the engine makes it harder to hear. The ticking doesn't appear to
increase in sound, only in speed.
Initially I had a very loud clanking/ticking when I first got it going
again. I pulled the valve cover and found the #3 exhaust rocker arm
had come off. The rocker bolts weren't torqued properly by the shop
that built the head. I torqued all rocker bolts down to 20 ft-lbs per
the Haynes manual. The loud clanking/ticking was gone, but now I had
a quieter ticking (still very noticeable) that changed with RPM. It
is loudest when first starting the engine, then it quiets down a
little. Once the engine is warm and I'm stopped at a light or
something, it seems to be intermittent (tick tick tick [pause] tick
tick [pause] tick tick tick etc.)
Tonight I pulled the valve cover off again and compared everything to
the old head. I found that the round clips that go over the lifters
wiggled easily, whereas those on the old head didn't. I swapped out
the clips and the bracket that holds them down. I made sure I torqued
all rocker bolts down to the right setting, rotating the crankshaft to
take the pressure off the rocker/springs (valve closed) as I tightened
each. When I restarted it, the ticking seemed to have disappeared,
but after it warmed up and I reved it a bit, it was back.
I'm kind of lost as to what to try next. I did notice that the
lifters on the old head could be pushed down and spring back up, while
those on the new head seemed solid. I would assume this is because
the ones in the old head had leaked down and lost their oil - but I'm
not too familiar with all this. I could try swapping the new and old
lifters, but thats about the last thing I can think of. Is there some
kind of oil additive to treat a condition like this, assuming it could
be stuck lifter? Thanks, Doug
_____________________________________________________
Check exhaust manifold flanges for bad gasket or improper tightening. |
|
| Back to top |
|
 |
tylernt Guest
|
Posted: Thu Nov 08, 2007 10:33 pm Post subject: Re: Ticking valves/stuck lifter? |
|
|
| Quote: | if the intake valve is closed, wheres the gas going? the injector is
still firing gas out, isnt it?
|
On SFI I suppose it'll pile up in the intake port, but on MPI little
if any gas will should make it into the intake port since no air will
be flowing there. |
|
| Back to top |
|
 |
Dyno Guest
|
Posted: Thu Nov 08, 2007 10:49 pm Post subject: Re: Ticking valves/stuck lifter? |
|
|
kb1jec@gmail.com wrote:
| Quote: | On Nov 7, 5:09 pm, tylernt <tyle...@gmail.com> wrote:
The lifters -should- be new. They all seemed to be pumped up with oil
when I opened it. It's not an interference engine. Aside from the
sound it's running fine.
Well if the tick comes and goes, that certainly sounds like a lifter
that is collapsing. Oil can't make it in to the lifter as fast as it
leaks back out. It's quietest when cold and at higher RPM when oil
pressure is high, and loudest when oil pressure is lowest (hot idle).
Perhaps it was damaged when the rocker arm fell off. Yes, I think your
idea of swapping in an old lifter is a good one. Be prepared for quite
the racket as it will take a few seconds to pump up with oil, it
should quiet down within a minute or two though.
How can I verify it's the lifter the rocker arm fell off? Could I
pull the plug wire and remove the rocker and lifter on that cylinder,
and start it and see if it still ticks? It will run on 3 cylinders, I
had a plug boot fall off once. Don't know if removing the rocker
would hurt it though (it wouldn't be firing with no plug wire
connected).
I could try Seafoam - I've put that in the oil before. What is the
ratio again (oz of seafoam per qt?)
Thanks,
Doug
It has Sequential Port Fuel Injection. If you disable the valvetrain on |
that cylinder, fuel will build up in the intake port. Just disconnect
that cylinder's injector and you can run your temporary test.
Since this engine has hydraulic lash adjusters that are fed from the oil
galley in the head, do not remove the lash adjuster or you will create a
huge oil leak that may starve any valvetrain components downstream of
the removed adjuster. This may also starve the cam bearings as well. If
you proceed make the test as short as possible.
You might be able to remove the rocker arm, and use a rubber band (or
equiv.) to hold the lash adjuster off the cam far enough to clear the lobe. |
|
| Back to top |
|
 |
Guest
|
Posted: Thu Nov 08, 2007 11:47 pm Post subject: Re: Ticking valves/stuck lifter? |
|
|
Could it be possible that the lifter pumped up too far (ie. all the
way) when the rocker came loose, and when I put the rocker back on the
clearance was messed up from start? How do you bleed them down (other
than waiting a week without running the car)? The 'piston' thing in
the middle of the old lifters could be pressed down and spring back up
- on the new ones they are solid and could not be pushed down by hand.
Unforunately I had to send the old head back, as there was a core
charge. I can get a lifter from the local junkyard for $5, but I'd
like to verify which one it is first. Even if I pulled the rockers
and the lifters for a quick second and ran it, wouldn't the others
tick if they were not receiving oil? You had mentioned that pulling
one would cut off oil flow to the other lifters downstream.. |
|
| Back to top |
|
 |
|
FAQ
Memberlist
Usergroups
Featured Site: Free Antivirus and Antispyware Info
Powered by p|-|pBB
Usenet and forums posts belong to their respective authors. Everything else is (c) 2004 - 2006 Web-S-Sense Pty. Ltd. Terms and Conditions of Use
|
|
|