[greensmurf20]

i have just put a new 2.0 into my GT.....when the motor starts to warm up a lifter clatter becomes very present and noisy. irritating to drive and makes ya go crazy listening to it. the valves are all adjusted well, and double checked. i'm thinking that maybe i have a weak lifter and that when the motor gets warmer the lifter collapses too easy...? causing my lifter clatter. any ideas?

 

[Conaero]

I have just had my 1.9L rebuilt and I have noticed that the engine has some clatter also. It is running in at the moment and must say the noise has eased.

It seams to be coming from the head somewhere, and does it more noticabley at idle when it gets hot.

 

[RallyBob]

i'm thinking that maybe i have a weak lifter and that when the motor gets warmer the lifter collapses too easy...? causing my lifter clatter. any ideas?

I assume then you have hydraulic lifters? Are they new or used? Opel hydraulics can definitely sometimes 'bleed down'. If it's not too much trouble, try swapping the offending lifter, or in a pinch, you can tear the lifter down and soak it in Marvel Mystery oil...that usually does it. Also, what grade oil are you using? If you're using a lightweight oil, that may be the culprit.

Bob

 

[greensmurf20]

tarquin, sounds like my car, just as RPMs increase the noise increases. gets louder and faster.

Rallybob: yes i have hydraulics and they are the origional set to this head, so they're used. i took a old junk valve cover and cut the top off so i could bolt it on the head and see what the valve train is doing, and keep the oil in the motor at the same time. me or dad cannot find a "weak lifter". when it gets warm you can hear one tapping but can't exactly pin point it. it sounds like the cam gear is smacking the front of the head and its hard to hear other things in the motor, and we're thinking maybe that the cam smacking the front of the head is transferring all the way through the back of the cam, making us think that when we put the stethescope on the motor that it was coming from the number 4 cylinder, when its really the cam. we tore this head all the way down and soaked it in carb acid and did a valve job on it. i'm using valvoline 10W-30 and running about 2 bars of oil pressure at an idle of 1100-1200.