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  #1  
Old 09-24-2010, 12:47 AM
Learning to use the forums
 
Join Date: Jul 2010
Posts: 14
Default hydralic lifters

Hi Guys

I have the heads back on and everything is back together.
I followed the manual regarding setting the adjustment of the valves; i.e. the rocker arms just touching the valves and then screw IN one and a half turns.
This necessarily means that the valves are being held open. Now I'm trying to start it and it spins over - but with no compression because the valves are all open and it won't fire.
Can somebody explain this to me? Have I done it wrong or do I just keep spinning it until the oil pressure shuts the valves?

Thanks
Laurie
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  #2  
Old 09-26-2010, 10:22 AM
indifferent ranger owner
 
Join Date: Sep 2010
Posts: 47
Default Re: hydralic lifters

Adjustment done with piston top of compression stroke?
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  #3  
Old 09-27-2010, 01:46 AM
Learning to use the forums
 
Join Date: Jul 2010
Posts: 14
Default Re: hydralic lifters

Well I've given myself a couple of day to think about this and I think there are a couple of possibilities.

1> The spring in the lifter has failed and the lifter is fully compressed. When I take up the slack and then put on another one and a half turns all I'm doing is compressing the valve springs. This would have to be true for every single lifter.

2> The spring in the lifter is fully extending the lifter and when I take up the slack and then put on another one and a half turns the valve springs are not able to drive the oil out of the lifter so it is locked in the fully extended position. This would also have to be true for every single lifter.

3> The lifters have spent so long in a particular partly compressed position that they have seized up and are just solid - to the extent that even the fully compressed valve springs do not apply enough pressure to move them. This would also have to be true for every single lifter.

4> Some clown in the past life of this engine has replace all the lifters with solids. There is a lot of evidence that it has been run on a tight budget in the past so this is possible.

As an experiment I set the valve clearances as if this was a 2.8 i.e. had solid lifters. It started straight away and ran very smoothly (to my ear). I shut it off very quickly because I still had the rocker covers off so I don't know what it would sound like when it was warm, but it works like that.

It sounds, to me, like I need to buy a whole new set of lifters. What do you think? Can you replace the lifters without replacing the camshaft - I really don't want to go there.

When you replace the lifters do you prime them with oil? If not where does the air go? Is there a bleed system?

Thanks
Laurie
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  #4  
Old 09-27-2010, 09:31 AM
Psycho Pete
 
Join Date: Jun 2009
Posts: 1,487
Default Re: hydralic lifters

Cam and lifters are typically replaced together. Heads also need to come off to get the lifters out.
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