Turbo fault possibility?

[Petrus Doyle]

Hello, has anyone had to replace the turbo on their thp 156? I had my engine stripped for cleaning carbon build up it was pretty gunked up having had power drops now and then for a year? 60,000 miles. Runs properly for a week since then power dropped for 10 mins after continuous motorway driving then back to right and since for return home. Will take car back to garage for possible tweaking.

 

[EddieJ]

Are there any strange noises or codes coming up?

As a couple of things you could check yourself that may have been disturbed during inlet cleaning;
Boost pipe not quite home again, should hear something tho like random whoosh release.
Vanos solenoid connector (standing at the bumper looking into the engine bay, rear left corner of the head), suggest checking this cold.
Injector plug not fully home.
Earthing nut (front of rocker cover under plastic cover, 6mm and 9nm, ie just a nip).

Could be a simple loose connection after the works being done, just getting lose enough through heat/vibration.
Best bet is to have it put on a diagnostics kit and checked over as quite a few things get disturbed during inlet cleaning or was it the entire engine stripped and rebuilt? If it was the full engine that was stripped the list could go on. And you can’t rule out that it is another fault not related to the cleaning.

 

[Petrus Doyle]

Are there any strange noises or codes coming up?

As a couple of things you could check yourself that may have been disturbed during inlet cleaning;
Boost pipe not quite home again, should hear something tho like random whoosh release.
Vanos solenoid connector (standing at the bumper looking into the engine bay, rear left corner of the head), suggest checking this cold.
Injector plug not fully home.
Earthing nut (front of rocker cover under plastic cover, 6mm and 9nm, ie just a nip).

Could be a simple loose connection after the works being done, just getting lose enough through heat/vibration.
Best bet is to have it put on a diagnostics kit and checked over as quite a few things get disturbed during inlet cleaning or was it the entire engine stripped and rebuilt? If it was the full engine that was stripped the list could go on. And you can’t rule out that it is another fault not related to the cleaning.

Yes thanks for the tips Eddie, I have since had turbo replaced which was faulty I was told on returning old turbo to supplier who sold it to me. Car ran better than ever for 10 days then power drops for a few minutes then back to right again. For couple weeks no trouble but dropped today for 20 minutes until stopped and restarted then back to boosting ok. No fault lights showing so garage staff scratching their heads, it had a full service 3 weeks ago when turbo fitted, I wonder if they fitted the correct spark plugs?