|
Post by trickydicky on Jul 12, 2022 21:51:13 GMT 1
I would try it with the MAF disconnected and see if it improves.
If you have access to a scan tool with live data you can do a volumetric efficiency/MAF calculation test (to see if the MAF is accurate).
The growling noise might well be a partially restricted exhaust/catalytic converter (although you would normally see fault code P0420 if the catalyst wasn't working well)
|
|
chts
New Member
Posts: 7
|
Post by chts on Sept 12, 2022 21:04:37 GMT 1
Update just for the record: It became apparent to us that the oil was quickly diminishing. We took the car to a mechanic for a fast check and when he took the spark plugs out, they were clearly damaged and had signs of oil. He said that Yaris models with this particular engine are known to be faulty. After a short trip of around 300kms in which the car lost (burnt) around 1lt or more of oil we contacted him again and he said that the oil clearly gets into the combustion chamber, probably because the oil ring is a little too loose (because of manufacturing error or/and bad oil servicing). He suggested checking the engine and if this is the case, restructuring the engine with new oversized pistons to fix the problem.
|
|
oli
Apprentice
Posts: 1,065
|
Post by oli on Sept 14, 2022 14:26:51 GMT 1
Ouch.
Swapping piston rings is a bit of a job. Is it economically viable?
I suppose at least you’ve only got three to do on one of these…
(Anyone else singing monty Python’s life of Brian?!)
Oli
|
|
|
Post by chippie on Sept 14, 2022 15:10:15 GMT 1
If you are looking to keep the car for an extended period,I think re ringing an engine that’s supping a litre of oil 1-3/4 pints! ) for every 300km or 200 miles is false economy…..especially if the bores haven’t been checked for wear, taper or ovality… there’s a lot of work involved in swapping rings out….head off, sump off as a minimum..
If it was mine, and I was going to keep it, assuming everything with the car is in good condition, I’d be looking at a low mileage engine to drop in….if you were going to get rid of it then just go the ring option but be prepared for some fallout…
|
|
|
Post by OldGit on Sept 14, 2022 22:42:35 GMT 1
Whatever the cause, it doesn't sound like a keeper - fix it up as cheaply as you can and get rid, a (barely) running car will get more at the scrappers than one pushed in.
|
|
chts
New Member
Posts: 7
|
Post by chts on Sept 15, 2022 22:59:45 GMT 1
Thanks for the feedback. The mechanic described that the engine will be disassembled, the cylinders will be measured to see how far from desired the diameter is and new oversized pistons will be inserted accordingly.
The estimated cost is around 1.5 to 2k€. We are considering going through. Any constructive feedback appreciated.
|
|