Reassempbly of valve lifters - AQ205

[quintonwatts]

Hi Guys

Attached is instructions from the engineer's manual for the re-assembly of the valve lifters on my AQQ205.

Problem I have is it is proving basically imposible to compress the inner piston down enough to get a pin in to hold it down whilst I fill the top with oil. Even tried it without the main plunger spring and coudln't do it. So is it OK to simply re-assemble, drop the piston in and position it as far down as possible, fill the top with oil and then finish assembly? I am guessing the difference between that and the required method is that there will be little or no oil in the bottom half of the valve lifter and I am nor sure whether it has a hydraulic purpose or just lubrication.

Cheers, Quinton

Onwards and upwards

 

[Lone Duck]

Re: Reassempbly of valve lifters - AQ205

Hi Guys

Attached is instructions from the engineer's manual for the re-assembly of the valve lifters on my AQQ205.View attachment 182023

Problem I have is it is proving basically imposible to compress the inner piston down enough to get a pin in to hold it down whilst I fill the top with oil. Even tried it without the main plunger spring and coudln't do it. So is it OK to simply re-assemble, drop the piston in and position it as far down as possible, fill the top with oil and then finish assembly? I am guessing the difference between that and the required method is that there will be little or no oil in the bottom half of the valve lifter and I am nor sure whether it has a hydraulic purpose or just lubrication.

Cheers, Quinton

Onwards and upwards

If you don't fill them with oil they will hammer ( they are hydraulic.) Set the piston on a piece of wood on your drill press . use a wooden dowel in drill press chuck and push down on plunger to set pin. then fill with oil. If you do not have a drill press, then use a (C) clamp and two pieces of wood . you must protect the plunger .

 

[quintonwatts]

Re: Reassempbly of valve lifters - AQ205

Thanks Lone Duck. Damn fiddly but done.

 

[Lone Duck]

Re: Reassempbly of valve lifters - AQ205

Thanks Lone Duck. Damn fiddly but done.

Glad to help. Just as a side note. If you are not going to install them right away, stand them up in a container filled with oil. Then they will not tip over and drain. Had that happen to me on a 57 chev.

 

[John2037]

Re: Reassempbly of valve lifters - AQ205

just curious due to a recent lifter repair - I filled them by just turning the engine over by the starter till the rockers seen oil. I've never had a lifter go bad so I didn't know. They pumped up fine, just wondering your thoughts.

 

[Lone Duck]

Re: Reassempbly of valve lifters - AQ205

just curious due to a recent lifter repair - I filled them by just turning the engine over by the starter till the rockers seen oil. I've never had a lifter go bad so I didn't know. They pumped up fine, just wondering your thoughts.

Some times the push rod will jump out and do damage if the rocker happens to be a little to loose. Probably wouldn't happen to an experienced mech. But it could.