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Author Topic: Anyone know about Astras?  (Read 48187 times)

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JamesV6CDX

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Re: Anyone know about Astras?
« Reply #60 on: 06 April 2020, 23:25:58 »

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Viral_Jim

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Re: Anyone know about Astras?
« Reply #61 on: 07 April 2020, 01:25:23 »

Yup, that's broken alright  ;D
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Broomies Mate

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Re: Anyone know about Astras?
« Reply #62 on: 07 April 2020, 03:01:07 »



I expect Terry has some locktite to fix that.
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henryd

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Re: Anyone know about Astras?
« Reply #63 on: 07 April 2020, 10:10:58 »



The scoring looks like alloy transfer from the piston,bit of emery cloth will make sure :y
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Re: Anyone know about Astras?
« Reply #64 on: 07 April 2020, 10:13:14 »

Possibly, but isn't the piston supposed to be the same shape as the cylinder...  ::)
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henryd

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Re: Anyone know about Astras?
« Reply #65 on: 07 April 2020, 10:15:09 »

Possibly, but isn't the piston supposed to be the same shape as the cylinder...  ::)

Probably was once ;D,f the alloy has been peened by the bit of glowplug it could have caused rubbing on cylinder wall,time will tell :y
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Re: Anyone know about Astras?
« Reply #66 on: 07 April 2020, 10:18:19 »

Zoom in and have another look  ;)
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Andy B

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Re: Anyone know about Astras?
« Reply #67 on: 07 April 2020, 10:19:22 »

I'm still trying to work out the photo  ??? What's the round bit in the middle of the piston? And is the scoring at about the 10 o'clock position?  :-\
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Andy B

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Re: Anyone know about Astras?
« Reply #68 on: 07 April 2020, 10:21:24 »

Zoom in and have another look  ;)

I think I've sussed it .....  ::) ;D ;D ;D

James .... send the piston up & take another photo  :y :y
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STEMO

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Re: Anyone know about Astras?
« Reply #69 on: 07 April 2020, 10:22:15 »

I'm still trying to work out the photo  ??? What's the round bit in the middle of the piston? And is the scoring at about the 10 o'clock position?  :-\
It's an extra special, super duper, superior diesel piston. Much better than your common or garden petrol one.  ;D
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Doctor Gollum

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Re: Anyone know about Astras?
« Reply #70 on: 07 April 2020, 10:23:50 »

Casting to clear the injector nozzle/swirl pot.

Piston damage is around 6 o'clock clearly... chunks out of it
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Andy B

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Re: Anyone know about Astras?
« Reply #71 on: 07 April 2020, 10:24:15 »

I'm still trying to work out the photo  ??? What's the round bit in the middle of the piston? And is the scoring at about the 10 o'clock position?  :-\
It's an extra special, super duper, superior diesel piston. Much better than your common or garden petrol one.  ;D

Petrol engines at our house outnumber my diseasal by at least 4 to 1  ;)
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Re: Anyone know about Astras?
« Reply #72 on: 07 April 2020, 10:26:47 »

Currently 50/50 here, all pretty evenly matched in capacity and cylinder number... The 330d is a bit quicker though :D
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Andy B

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Re: Anyone know about Astras?
« Reply #73 on: 07 April 2020, 10:27:10 »

Casting to clear the injector nozzle/swirl pot.

Piston damage is around 6 o'clock clearly... chunks out of it

Obviously not  ;) If there's a chunk missing at the bottom, then it's also buggered up at around 1 or 2 o'clock ..... we need a better picture  :y
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Re: Anyone know about Astras?
« Reply #74 on: 07 April 2020, 10:34:48 »

There's a clear chip to the left of the lower valve recess (as you look at it).

The reflection from the cylinder wall is uniform apart from a definite chip or three. The debris on the top side of the picture is masking potential damage there, but the reflected gap closes rather than opening.
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