Metal Fragments in Sump/Pan
#1
Metal Fragments in Sump/Pan
Morning all, I had a thread going here for a knocking noise I was investigating but I figured it was worth starting a new one for this.
https://www.s2ki.com/s2000/topic/855...d-at-idle-vid/
So long story short, I had a slight knocking coming from the bottom end of the engine, it wasn't very loud but it sounded like it needed addressing immediately.
I pulled the sump yesterday and was astonished to find it was full of little bits of plastic/rubber from what looked like an oil seal of some sort - my guess is something must have fallen into the valve train and been obliterated. I checked the bores for scoring and was relieved to find they look clean however, whilst checking the bores I noticed some bits stuck in the oil pickup of the oil pump wedged against the strainer.
This is what I pulled out:
... they fit together
...closer
I'm completely baffled - I have no idea what this is or where it came from but it is pretty heavy so I assume it is major.
I'm going to cut open the oil filter later and perhaps take the rod bearing caps to inspect for damage to the crank but I am fearing the worst now...
https://www.s2ki.com/s2000/topic/855...d-at-idle-vid/
So long story short, I had a slight knocking coming from the bottom end of the engine, it wasn't very loud but it sounded like it needed addressing immediately.
I pulled the sump yesterday and was astonished to find it was full of little bits of plastic/rubber from what looked like an oil seal of some sort - my guess is something must have fallen into the valve train and been obliterated. I checked the bores for scoring and was relieved to find they look clean however, whilst checking the bores I noticed some bits stuck in the oil pickup of the oil pump wedged against the strainer.
This is what I pulled out:
... they fit together
...closer
I'm completely baffled - I have no idea what this is or where it came from but it is pretty heavy so I assume it is major.
I'm going to cut open the oil filter later and perhaps take the rod bearing caps to inspect for damage to the crank but I am fearing the worst now...
#3
Would the wrist pin be able to slide down the side of the piston without scoring the bore? hmmm.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
#5
Would the wrist pin be able to slide down the side of the piston without scoring the bore? hmmm.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
Cheers for the offer, yorkshire is quite a way to go to get covered in oil.
It is utterly bizarre isn't it? I've just been out there again with an inspection mirror and a high powered torch and again I can't see any scoring on the bores.
I just pulled a big end bearing cap as well to see if that crap had gone through the oil and killed the crank:
I'd love to just pull the motor but unfortunately I haven't got a garage to work in or an engine crane here, I'm working on the street in the middle of London. Also with the cost and availability of parts over here if I do lift the engine I doubt I would be rebuilding it as would be cheaper just to get another one.
Like I say though - despite how bad this all looks, the engine was running fine with just a subtitle knocking sound audible at idle - if you stood away from the car with the bonnet closed you couldn't even hear it.
... hmmm its right old puzzle,
#6
Standard Pin Diameter
Standard (New): 22.961 - 22.965mm
... alright, i'm convinced it is a bit of a piston pin now.
The question is, how does one break this savagely yet not send a rod through the block... how does one of these break at all?
Well I am going to pull the head tomorrow and the pistons for a good look - I am in for a pound now anyway.
#7
Would the wrist pin be able to slide down the side of the piston without scoring the bore? hmmm.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
It could be part of the wrist pin, regardless I think finding that in the oil pick up justifies pulling the engine and pulling it apart
If it was part of the pin I'm surprised it hasn't gone pop!?
If I lived closer I'd be happy to come help.
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#8
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As far as I know, wrist pins do not have a "stepped" outer diameter, as you can see in picture #1 and #3 (first post)
They are held in place by a snap ring on both sides of the piston - in a recessed groove.
The service manual doesn't specify where to measure the 22,961/965 mm and IMO they would if the wrist pin had more than 1 outer diameter.
A stepped wrist pin would only fit in the piston in 1 way.
Also, that is not mentioned in the service manaual.
I don't think its a wrist pin.
They are held in place by a snap ring on both sides of the piston - in a recessed groove.
The service manual doesn't specify where to measure the 22,961/965 mm and IMO they would if the wrist pin had more than 1 outer diameter.
A stepped wrist pin would only fit in the piston in 1 way.
Also, that is not mentioned in the service manaual.
I don't think its a wrist pin.
#9
As far as I know, wrist pins do not have a "stepped" outer diameter, as you can see in picture #1 and #3 (first post)
They are held in place by a snap ring on both sides of the piston - in a recessed groove.
The service manual doesn't specify where to measure the 22,961/965 mm and IMO they would if the wrist pin had more than 1 outer diameter.
A stepped wrist pin would only fit in the piston in 1 way.
Also, that is not mentioned in the service manaual.
I don't think its a wrist pin.
They are held in place by a snap ring on both sides of the piston - in a recessed groove.
The service manual doesn't specify where to measure the 22,961/965 mm and IMO they would if the wrist pin had more than 1 outer diameter.
A stepped wrist pin would only fit in the piston in 1 way.
Also, that is not mentioned in the service manaual.
I don't think its a wrist pin.
I found this picture of a wrist pin from a v8 Camaro - perhaps the F20C ones are similar?
#10
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Is the diameter A different from diameter B?
What is the black line seperating part A from B?
If part B has a smaller diameter and it doesn't look it was causd by wear then I think its is not a wrist pin.
If it IS wear.. then it could be a mangled-up wrist pin but how would the engine have been running at all with one piston not connected to the piston rod?