loss of power, turbine over pressuring?

[elmtreeandy]

Hello from a newbie. Hopefully I can add as much as I glean from this site. I have a 1998 HDI 110BHP which recently went in to my local garage for a cam belt. It came out sounding a bit rough and lasted about 50 miles before the engine gave up. Took it back to garage to find valve and follower damage which was put right. Picked car up again and found it had a terrible squeal after about 1500 rervs when you put your foot on the accelerator and absolutely no power and no turbo. At this stage I took it to the Peugeot dealer40km away (I live in Spain) and let them loose on it. They checked the timing which improved the performance slightly and changed the egr valve, which appears to have been done because of a fault code. the turbo still produces a noise and appears to be over pressuring ( a guess as I really dont know what pressure it should produce). I am about to buy a diagnostic tool to monitor the engine. The turbo is working but there is very little basic power from the engine. Peugeot say I need a new turbo but there is plenty of pressure so I dont understand why unless it is the turbo making the noise (very difficult to pinpoint). It takes forever to build up speed but is capable of 80mph max and dies rapidly on any upward slope. It is getting embarrasing being overtaken by ladies pushing prams, please help me. Thanks in advance and I hope some of my knowledge will be useful to you.

[puggy]

hi there and welcome you say you took it to a garage to have the cambelt changed
and thats when your problems started . it was noisy when you picked it up, sounds like they
got the timing slightly out but close enough to run,when you took it back and they supposedly
fixed it did they say what had caused it ??? sounds like one of the pistons has whacked a valve
to me and that could be your problem,i would go back to that garage and demand they put it
right,as for peugeot main dealer they tend to be dickheads who know fook all and just want to
get money out of you !!

[elmtreeandy]

Thanks for your views. Yes a piston had been whacked but i have had the cylinder head repaired and skimmed when i got the original idiot to put the engine right. Today i gave the maf a good clean and a fair bit of power has been restored, However it still squeals like a stuck pig when accelerating from about 1800 revs and i dont appar to have much power once i get to about 3000 revs. at low revs there appears to be a good amount of torque so to be honest I really dont know what is going on. Do these have an over pressure pop off valve on the wastegate? Could the squeal be air escaping from the inlet manifold via bad joint on gasket? Where it is situated certainly doesn't make faultfinding easy. any help? Any idea what the manifold pressure should be at high revs?

[puggy]

A normal 110 around 3000 rpm the power starts to fade away,you would
need a re-map to get anymore above this range, you sure the squealing is
not something simple like the aux belt slipping or maybe a leak in the turbo
piping

[elmtreeandy]

Thanks for the reply. The squeal is definitely not the aux. belt. It really does sound like air escaping but is coming from the back of the engine, which is why I am suspecting manifold leak. When I say the power fades after 3000revs it just disappears. Previous to the "preventative maintenance" the car was in good health and very quick for a diesel. I have benchmarksto check performance ( speeds I can reach on certain parts of the road) and I am woefully short at the moment. Although it will rev above 3000 , second gear upwards on a flat road it will not accelerate at all. We have a Bosch mechanic in the town 40km away from us and I am tempted to let him have a look. However after my experiences with the locals I am not convinced anyone iover here has the required competance to put the key in the ignition never mind carry out repairs.
How easya job is replacing the manifold gasket? I am an instrument technician and have lots of general knowledge but not a lot on infernal combustion engines. On the up side, the sun is shining and the tem[perature is a pleasant 25 degrees