| Bleeding Hydraulic Roller Lifters [message #781915] |
Fri, 21 July 2006 03:27 |
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I have a question about the roller lifters in my 96 Mitsubishi 2.4L 4
cyl SOHC engine. I just had the head and valves ground after my timing
belt broke. Due to some bad information I had for timing the camshaft
gear, I bent some of the intake valves during the cylinder head
reinstall process. I removed the rocker shaft and lifters when I was
trying to determine the miss in the engine. I found that the #4
cylinder had bent intake valves and they were not closing completly.
After removing the head & replacing the bent intake valves I
reinstalled the intake side rocker shaft and lifters. After starting
the engine the lifters were very noisy. The lifters are new. The guy at
the machine shop told me he usually bleeds the old lifters down so that
they fill again without being noisy. These are small lifters and i used
a small pin to un-seat the check ball and bleed them out. Now I can't
get the engine to run. It started for a little and then stopped. I
removed one of the lifters and see that it is still not filled with
oil. Did I cause permanent damage to the lifters? Shouldn't it fill
with oil rather quickly? I found out now that the noisy lifters were
due to the rocker shaft being installed unside down, blocking the oil
hole. Oil is coming out through the rocker arms now while cranking it
over. Any advice is appreciated.
Don
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| Re: Bleeding Hydraulic Roller Lifters [message #781928 ] |
Fri, 21 July 2006 06:37 |
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> they fill again without being noisy. These are small lifters and i used
> a small pin to un-seat the check ball and bleed them out. Now I can't
> get the engine to run. It started for a little and then stopped. I
> removed one of the lifters and see that it is still not filled with
> oil. Did I cause permanent damage to the lifters? Shouldn't it fill
> with oil rather quickly? I found out now that the noisy lifters were
> due to the rocker shaft being installed unside down, blocking the oil
> hole. Oil is coming out through the rocker arms now while cranking it
> over. Any advice is appreciated.
>
No, you did not damage the lifters. Get the thing started with some
carb cleaner or starting fluid and run it at 2000rpm for a few minutes.
Having them clack around while they fill up with oil isn't going to
hurt anything so long as the top end is getting oil delivered to it,
and you said you see oil at the rocker shaft so you should be good to
go.
Chris
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| Re: Bleeding Hydraulic Roller Lifters [message #781978 ] |
Sat, 22 July 2006 09:47 |
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Did you replace the valve yourself or did you have the machine shop or
repair place do it - the reason that I ask is because you could have also
damaged the valve seat i.e. could be where the noise is coming from!
--
There are no words that can be heard unless someone listens....
<donh [at] wielanddesigns.com> wrote in message
news:1153445265.366750.263640 [at] i42g2000cwa.googlegroups.com...
> I have a question about the roller lifters in my 96 Mitsubishi 2.4L 4
> cyl SOHC engine. I just had the head and valves ground after my timing
> belt broke. Due to some bad information I had for timing the camshaft
> gear, I bent some of the intake valves during the cylinder head
> reinstall process. I removed the rocker shaft and lifters when I was
> trying to determine the miss in the engine. I found that the #4
> cylinder had bent intake valves and they were not closing completly.
> After removing the head & replacing the bent intake valves I
> reinstalled the intake side rocker shaft and lifters. After starting
> the engine the lifters were very noisy. The lifters are new. The guy at
> the machine shop told me he usually bleeds the old lifters down so that
> they fill again without being noisy. These are small lifters and i used
> a small pin to un-seat the check ball and bleed them out. Now I can't
> get the engine to run. It started for a little and then stopped. I
> removed one of the lifters and see that it is still not filled with
> oil. Did I cause permanent damage to the lifters? Shouldn't it fill
> with oil rather quickly? I found out now that the noisy lifters were
> due to the rocker shaft being installed unside down, blocking the oil
> hole. Oil is coming out through the rocker arms now while cranking it
> over. Any advice is appreciated.
>
> Don
>
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| Re: Bleeding Hydraulic Roller Lifters [message #781983 ] |
Sat, 22 July 2006 16:05 |
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The machine shop changed the valves. I have tried starting it with
starting fluid but it still won't start. Compression is only about 90
psi on all cyl. it should be 190.
Here is a recap of what is going on- 2.4L SOHC 4 Cyl.
1.Replaced bent intake valves, reinstalled head, engine ran strong but
had noise in the top end.
2.Pulled intake side rocker shaft and bled down the eight lifters in
the end of the rockers.
3.found that the rocker shaft was installed 180 deg off and blocked oil
passage causing the noisy lifters.
4.installed rocker shaft correctly
5.engine started and ran for about 10 sec. then died.
6.cylinder compression check - 90 psi on all 4 cyl., should be 190
7.checked spark - OK
8.checked fuel, disconnected line from injector rail. Fuel comes out of
fuel line only during cranking
9.checked timing, still good
10. when cranking engine I think I can hear air coming out of the air
intake
I'm still puzzled...
Daryl Bryant wrote:
> Did you replace the valve yourself or did you have the machine shop or
> repair place do it - the reason that I ask is because you could have also
> damaged the valve seat i.e. could be where the noise is coming from!
>
> --
> There are no words that can be heard unless someone listens....
> <donh [at] wielanddesigns.com> wrote in message
> news:1153445265.366750.263640 [at] i42g2000cwa.googlegroups.com...
> > I have a question about the roller lifters in my 96 Mitsubishi 2.4L 4
> > cyl SOHC engine. I just had the head and valves ground after my timing
> > belt broke. Due to some bad information I had for timing the camshaft
> > gear, I bent some of the intake valves during the cylinder head
> > reinstall process. I removed the rocker shaft and lifters when I was
> > trying to determine the miss in the engine. I found that the #4
> > cylinder had bent intake valves and they were not closing completly.
> > After removing the head & replacing the bent intake valves I
> > reinstalled the intake side rocker shaft and lifters. After starting
> > the engine the lifters were very noisy. The lifters are new. The guy at
> > the machine shop told me he usually bleeds the old lifters down so that
> > they fill again without being noisy. These are small lifters and i used
> > a small pin to un-seat the check ball and bleed them out. Now I can't
> > get the engine to run. It started for a little and then stopped. I
> > removed one of the lifters and see that it is still not filled with
> > oil. Did I cause permanent damage to the lifters? Shouldn't it fill
> > with oil rather quickly? I found out now that the noisy lifters were
> > due to the rocker shaft being installed unside down, blocking the oil
> > hole. Oil is coming out through the rocker arms now while cranking it
> > over. Any advice is appreciated.
> >
> > Don
> >
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