33 25DET compression leak - lifter issue ?

[discopotato03]

Hi all , I have an idle issue that comes and goes - mostly stays but occasionally rights itself . Moving timing mixtures around achieved zip but still have the irregular idle and occasional high idle and or stalling issues hot .

Got sick of this and had the engine leak down tested which showed air leaking out the exhaust . The fact that the idle comes good some times must mean that it doesn't have a major valve or seat issue because they don't fix themselves . SK has suggested a sticking hydraulic bucket and given the costs of removing/rebuilding heads checking no 2's exhaust side buckets seems logical .

Is this not an unknown problem for a 20 yr 163K old 33 25 engine ?

I don't like the sound of engine oil flushes but the thought of a couple of short runs with high detergent diesel engine oils may be ok .

 

Thoughts ?

Cheers A . 

[Dale FZ1]

Couple of different possible approaches.

See if a flush treatment makes any real inroads to the problem.

Run diesel spec oil - Rimula, Dello or similar and see what happens.  Don't know why you'd make it short run, new oil is new oil and you might as well give the detergent time to work its magic.

Lift the cams and buckets, spend a day disassembling  and scrubbing the lifters and then reinstall.  Quite a bit of time but bugger all expense if it's a home job.

 

[discopotato03]

Yes , in with a gut full of GTX Diesel and the pretty much normal idle is back within 200 odd km . Didn't like the sound of those flush additives .

A .