Engine destroyed by an 8mm nut!
Discussion
I am with Thinforth, There is no way a nut would fit down the dipstick tube, Into the oil filler maybe but then it would be at the top end of the engine.
I have been involved with building engines for over 20 years, dropping stuff in the engine is not a good idea and more often than not will cause all kinds of trouble but I fail to see how you got an 8mm nut into the bottom end and did it that to the bearings.
Assuming the nut got in there, it would more likely sit still on the bottom of the sump forever, but if it were to get whipped up it would have jammed up on another component and cracked the other part or dented it while it forced its way out the other side of the jam, you would see evidence of this forcing of jamming and the damaged nut would be either embeded in a soft alloy part or it would be in the sump again.
The rotating assembly would not grind the nut and turn it into filings which would then go up the oilways and block it all up.
It's more likely that the engine was knackered by the strainer being full up of all that red hermetite sealer s
t someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves.
I have been involved with building engines for over 20 years, dropping stuff in the engine is not a good idea and more often than not will cause all kinds of trouble but I fail to see how you got an 8mm nut into the bottom end and did it that to the bearings.
Assuming the nut got in there, it would more likely sit still on the bottom of the sump forever, but if it were to get whipped up it would have jammed up on another component and cracked the other part or dented it while it forced its way out the other side of the jam, you would see evidence of this forcing of jamming and the damaged nut would be either embeded in a soft alloy part or it would be in the sump again.
The rotating assembly would not grind the nut and turn it into filings which would then go up the oilways and block it all up.
It's more likely that the engine was knackered by the strainer being full up of all that red hermetite sealer s
t someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves.
I struggle so see how the nut could have caused that - and how an 8mm not actually fits in a dipstick tube (I suspect you'll find it on the garage floor). I suppose its 'possible' it could have got jammed between a rod / crank & been torn into little bits. Even so, its probably not the cause of the oil starvation.
Incidentally, I recently had a Porsche 944 in with no oil pressure, the cause was a tiny piece of swarf (from a failed cam tensioner) which got jammed in the relief valve. You can just about see it in the pic....
Incidentally, I recently had a Porsche 944 in with no oil pressure, the cause was a tiny piece of swarf (from a failed cam tensioner) which got jammed in the relief valve. You can just about see it in the pic....
. So in future better to do this than rebuild an engine then.
Getragdogleg said:
The rotating assembly would not grind the nut and turn it into filings which would then go up the oilways and block it all up.
Well that is what happend! & the marks on the counterweight & oil rail make it pretty apparent.Getragdogleg said:
It's more likely that the engine was knackered by the strainer being full up of all that red hermetite sealer st someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves.
Thats funny because I put the red sealer st someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves. t on afterwards! after cleaning out all the metal.Does anybody on piston heads have anything usefull to say or are you just going to keep telling me that it didn't happen?
Edited by sc001 on Sunday 27th November 20:27
sc001 said:
Getragdogleg said:
The rotating assembly would not grind the nut and turn it into filings which would then go up the oilways and block it all up.
Well that is what happend! & the marks on the counterweight & oil make it pretty apparent.sc001 said:
Getragdogleg said:
It's more likely that the engine was knackered by the strainer being full up of all that red hermetite sealer st someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves.
Thats funny because I put the red sealer st someone has lagged around the sump to block join, the sealer filled the strainer causing oil starvation and then the bearings ate themselves. t on afterwards! after cleaning out all the metal.You don't know what you are talking about, also you must think we are
s of the highest order if think we are going to fall for any more of your tttery.f
k off to bed son, it's a school night.The OP of this thread is either a billy bullstter or an idiot who is not prepared to learn the real reason why his engine went bang.
tter or an idiot who is not prepared to learn the real reason why his engine went bang.Edited by Getragdogleg on Sunday 27th November 20:29
sc001 said:
are you just going to keep telling me that it didn't happen?
^pretty much this. Do you really think a nut is going to get wedged next to a counterweight which is rotating at 900-9000RPM for a sufficient amount of time for it to be ground into fine filings, and then get picked up through the oil strainer, get through the oil filter and continue to circulate the engine, until suddenly there was a bottom end failure?I've only retreived a few bits and bobs from sumps in the past, but usually they're lightly chewed at worst!
littleredrooster said:
So, pray tell how, after many weeks (or miles), a nut can leap 6 or 8 inches upwards through a viscous liquid and land (miraculously) between the rod and counterweight?
Bad luck! like I said. & its more like 2 inches assuming it landed on top of the windage trey.Timbuk2 said:
I think some of the comments are a little over the top on here, no need to be so nasty is there?
If you are refering to my posts then sorry they seem so blunt, the OP need to realise there is a huge hole in his reasoning regarding the engine failure.i would tell him the same to his face in the same way if he came into my workshop with this tale and that engine.
It's not nasty, it's not aggressive, it's trying to tell him to look again, he is wrong.
Getragdogleg said:
No, no you didn't, that stuff has been used and comressed and is peeling off where the sump has been removed.
I'm just not going to comment on that!BTW, of course its been used, I put it on there! of course its been compressed, I screwed the sump back on! & of course its peeling off, I removed the sump again!
I guess next your going to tell me that I don't have a white prelude, that I dream't the whole thing.
Lol I have a set of bearings that look like that, what happened was I lost oil pressure and it got really hot and seized up, come to think of though I think I drop a 13mm ratchet spanner down the dipstick hole, and I think it may have got stuck between the piston and the barrel, causing the lack of oil pressure....Oh wait....
O/P you're being a complete gammon slipper, stop defending this codswallop fantasy story to make your engine, which ran out of oil pressure and killed itself, not because an 8mm nut falling in the dipstick, this has nothing to do with a nut being dropped in the dipstick hole (btw consider a career in darts) but more to do with complete stupidity and lack of understanding.
The only way this nut would have caused problems (why you didn't remove it straight away God only knows) is if it was stuck in the oil strainer and blocked the feed tube, thus starving the engine of oil.
O/P you're being a complete gammon slipper, stop defending this codswallop fantasy story to make your engine, which ran out of oil pressure and killed itself, not because an 8mm nut falling in the dipstick, this has nothing to do with a nut being dropped in the dipstick hole (btw consider a career in darts) but more to do with complete stupidity and lack of understanding.
The only way this nut would have caused problems (why you didn't remove it straight away God only knows) is if it was stuck in the oil strainer and blocked the feed tube, thus starving the engine of oil.
Getragdogleg said:
You don't know what you are talking about, also you must think we are s of the highest order if think we are going to fall for any more of your tttery.
I don't profess to know what I am talking about but I though maybe somewhere on piston heads might be some people who could offer proper advice or comment's. But I guess your probably just a bunch of kids or something, I think I'm going to leave piston heads & go back to torquecars.coms of the highest order if think we are going to fall for any more of your tttery.sc001 said:
Getragdogleg said:
No, no you didn't, that stuff has been used and comressed and is peeling off where the sump has been removed.
I'm just not going to comment on that!BTW, of course its been used, I put it on there! of course its been compressed, I screwed the sump back on! & of course its peeling off, I removed the sump again!
I see, so you took the sump off the knackered engine, and looked about a bit, found it was knackered but thought "ohh, I better pop the sump on again" so you lashed all that sealer crap about and did up all the bolts, then decided "ohh, I better post a pic of my oil starved bottom end on PH" so undid all the bolts, pulled the sump off again and took your pics.
Getragdogleg said:
Timbuk2 said:
I think some of the comments are a little over the top on here, no need to be so nasty is there?
If you are refering to my posts then sorry they seem so blunt, the OP need to realise there is a huge hole in his reasoning regarding the engine failure.i would tell him the same to his face in the same way if he came into my workshop with this tale and that engine.
It's not nasty, it's not aggressive, it's trying to tell him to look again, he is wrong.
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