Jim-SR
30-10-2007, 19:13
this isnt strictly mk1.5 related, the engine is still in an ST205. but ive drawn the short straw at work and have to fix the sodding thing. absolute nightmare of a car to work on, so im going to try and figure out what could be wrong with it before i start stripping it to pieces
basically it dropped a valve a while ago, it was all repaired to a semi-ok standard just so that it ran alright, with the intention of the car getting sold. however it got driven again, and a few weeks later the turbo blew up because someone wound the boost up. a 2nd hand turbo got chucked on and the car ran fine again, until a couple more weeks later it was getting absolutely caned up a motorway, and developed a very disturbing knocking noise. it came back on a trailer, and hasnt been touched since
the knocking noise is dependant on the engine revs. you start the car up, you get this constant knocking noise, bang bang bang bang. it sounds like hitting the engine block with a hammer would sound, and about that loud!! its enough to make you absolutely cringe when you start the car, but it had to be started a handful of times to move it around, and frankly none of us cared if it made it worse lol. as the revs rise, the noise occurs more frequently
so based on that, im convinced its not the turbo, as that wouldnt spin up fast enough to rise and fall perfectly with engine revs. my first thoughts were that the 2nd hand turbo has shÃ*t itself, dumped a load of oil through the engine, its run low on oil, and has then done a bottom end bearing. it certainly sounds to me like a bottom end bearing has let go in a big way. but the oil level is perfect
you have to bear in mind here that when it was being driven the driver was in rush to get somewhere, and wouldnt have even blinked at the gauges showing up anything worrying, and even the noise probably started quiet and was driven until it was too loud to bear. i dont think the engine runs badly, at idle it is spot on aside from the knocking noise. so to me that would suggest it hasnt dropped another valve.
does anyone have any suggestions on things which can commonly go wrong on 3S-GTE's, as its not an engine i know particularly well. and basically, has anyone got any suggestions on what it could be, based on those symptoms?
i thought id ask here ahead of any of the Celica forums, etc, because i know that lots of you know these engines better than any of the Celica guys, and i know how helpful you all are ;)
so any help at all is greatly appreciated!! cheers
JIM
basically it dropped a valve a while ago, it was all repaired to a semi-ok standard just so that it ran alright, with the intention of the car getting sold. however it got driven again, and a few weeks later the turbo blew up because someone wound the boost up. a 2nd hand turbo got chucked on and the car ran fine again, until a couple more weeks later it was getting absolutely caned up a motorway, and developed a very disturbing knocking noise. it came back on a trailer, and hasnt been touched since
the knocking noise is dependant on the engine revs. you start the car up, you get this constant knocking noise, bang bang bang bang. it sounds like hitting the engine block with a hammer would sound, and about that loud!! its enough to make you absolutely cringe when you start the car, but it had to be started a handful of times to move it around, and frankly none of us cared if it made it worse lol. as the revs rise, the noise occurs more frequently
so based on that, im convinced its not the turbo, as that wouldnt spin up fast enough to rise and fall perfectly with engine revs. my first thoughts were that the 2nd hand turbo has shÃ*t itself, dumped a load of oil through the engine, its run low on oil, and has then done a bottom end bearing. it certainly sounds to me like a bottom end bearing has let go in a big way. but the oil level is perfect
you have to bear in mind here that when it was being driven the driver was in rush to get somewhere, and wouldnt have even blinked at the gauges showing up anything worrying, and even the noise probably started quiet and was driven until it was too loud to bear. i dont think the engine runs badly, at idle it is spot on aside from the knocking noise. so to me that would suggest it hasnt dropped another valve.
does anyone have any suggestions on things which can commonly go wrong on 3S-GTE's, as its not an engine i know particularly well. and basically, has anyone got any suggestions on what it could be, based on those symptoms?
i thought id ask here ahead of any of the Celica forums, etc, because i know that lots of you know these engines better than any of the Celica guys, and i know how helpful you all are ;)
so any help at all is greatly appreciated!! cheers
JIM