How To Tell If You Have A Stuck Lifter?

[returnofjim 0]

I put a post on here a few weeks back about an new mi16 engine thats started running on 3 cylinders, after a compression test we found that there was zero compression on cylinder number 1 at the cambelt end. i have took both cams out now and wondering what i should look for to tell if its a lifter thats stuck or a valve.

 

here is the link to the original post i put up:

 

Original post

[returnofjim 0]

lifters have been taken out, some will move when you press them with your fingers and some of them move freely other dont move at all, the ones that dont move, are they nackered?

[Sandy 191]

Possibly just in hydralic lock. I would tell you to try squeezing them down in a vice, but if you do, you have to exercise your judgement on where to stop, which isn't something I can readily explain how to feel!

[returnofjim 0]

Possibly just in hydralic lock. I would tell you to try squeezing them down in a vice, but if you do, you have to exercise your judgement on where to stop, which isn't something I can readily explain how to feel!

 

Ok ive tried this with one of the stuck lifters, put it in the vice with a bit of wood either side to stop any damage happeneing, i didnt want to turn the vice too much as i didint want to cause any further damage if there ok, but even with a bit of pressure in the vice it didint move at all, one of the lifters is very free and moves about 2mm just using your fingers. If the engine has been stood for a long time would this cause the lifters to stick. Out of all 16 lifters there is only 1 or 2 that move free, there is very minimal movement in some other but nowhere near as much as the one thats got 2mm movement?? am completely baffled and would like to avoid removing the head if thats possible.

 

Now ive got both cams out could i do a homemade leak test using a compressor or something to see if there is any leaking valves??

 

Am quickly running out of ideas and patience and need some advice

[Ryan 99]

You can try cleaning the lifters out.

 

Soak them in some gunk or thinners for a while then tap them sharply on a hard surface until the pistons come out (they might need a bit of gentle persuasion with some pliers - be careful). Then push the little ball valve in the piston with a sharp point and squeeze all the old oil out.

 

When you refit them they might take a while to pump back up properly so the engine will sound very tappety for a short while.

[returnofjim 0]

You can try cleaning the lifters out.

 

Soak them in some gunk or thinners for a while then tap them sharply on a hard surface until the pistons come out (they might need a bit of gentle persuasion with some pliers - be careful). Then push the little ball valve in the piston with a sharp point and squeeze all the old oil out.

 

When you refit them they might take a while to pump back up properly so the engine will sound very tappety for a short while.

 

Ok cheers, ill try that tomorrow.

 

Thanks