New here with broken car.

[Diddles]

Ok I've cleaned the bores and pistons. Cylinder 2 has the bit missing, all the others have very small hair line cracks in the others. Engine turns over smoothly with consistent piston travel. Bores and smooths and no deep scores. Light scratches maybe but not ones you can feel with you finger. Now my parents have as its they will pay the £500 for new chain, tensioner, valves and sprockets etc. Could this run right how it is or would it cause major problems. Worth a try and if it doesnt work out just call it a day?
Pictures are start from cylinder one.

 

[LostKiwi]

I'd be pretty happy to put that back together and use it as long as the ring isn't visible at the bottom of the broken off bit. If you were really picky remove the area cracked on each piston so they all match.

 

[Diddles]

I would love to at least try it. I think replacing pistons or engine isn't an option really on the drive as its on a pretty steep incline. If the other pistons do chip away then wouldn't they just be fired through the exhaust valves.
Im pretty sure the ring isn't visible, what would happen if it was.

Picture of bit missing compared to my thumb.

 

[alexanderfoti]

I would be trying to remove the chipped bits you pointed at. They could go out the exhaust valve but they equally could get stuck in the head or in a valve seat.

Otherwise I would put it back together and run it. Should be fine!

 

[Diddles]

I tried just trying to pry the chips with a flat head but didn't really budge them.

Couldn't the chip causes hot spots on the piston and pre ignite?

Where im going with this now is build back up replacing valves etc and keeping my fingers crossed or giving in and scraping it. My parents are happy to pay for the parts as they really want me to have it up and running and for me to enjoy. So it won't cost me anything just my time really.

 

[LostKiwi]

View attachment 42546 I would love to at least try it. I think replacing pistons or engine isn't an option really on the drive as its on a pretty steep incline. If the other pistons do chip away then wouldn't they just be fired through the exhaust valves.
Im pretty sure the ring isn't visible, what would happen if it was.

Picture of bit missing compared to my thumb. View attachment 42544

Just zoomed in on the broken bit and it's fine. If the ring were exposed the direct combustion heat would cause it to fail as it would be unsupported above and prone to heat damage. It's not visible so all good.

To remove the pieces from other cylinders use a Dremel while piston at tdc. Carefully grind it away using a metal burr then move the piston down and wipe the bore. Make sure to not leave sharp edges.
Any small pieces of aluminium will be ejected quickly or burnt and are soft enough not to cause damage.

 

[Diddles]

I don't have a dremel but mighy try a small chisel and a gentle tap or just leave be.
Would it be worth trying to smooth the sharp edges of the chip on the piston to try and eliminate a possibility of a bit spot?

 

[LostKiwi]

You could get a basic Dremel... Useful to have (and not that expensive)...

 

[alexanderfoti]

Sorry I meant the chipped bit In the last pictures of your second to last post, rather than the one that's already broken off.

But yeah looks OK to me

 

[LostKiwi]

Dremel 3000-15 Multitool, 130 W, 15 Accessories https://www.amazon.co.uk/dp/B0078LENZC/ref=cm_sw_r_cp_apa_Xwq0Ab8VM1XQC

 

[LostKiwi]

Diddles, where in the UK are you?

 

[Diddles]

Yeah that's true been times when I wish i had one.

I'm in South East, Bromley area.

 

[alexanderfoti]

Yeah that's true been times when I wish i had one.

I'm in South East, Bromley area.

I'm in bromley too. Welcome to borrow any tools you need

 

[Diddles]

Thanks for the offer! I'll keep that in mind if I get stuck but hopefully should be ok. Well to be honest the car is in west wickham on my parents drive but i live in Shirley so more Croydon not that it makes any difference.
Would these be what I should be using on the dremel. Worth smoothing the edges of the chip aswell as removing the cracked ones.

 

[alexanderfoti]

Die grinder bits, they will work but be careful. They will remove a lot of material quickly.

No worries just message me if you get stuck.

 

[Diddles]

Thanks a lot guys for all the help and advice.

I was really disheartened about this but feeling like it could all work out now. Will update with the progress. Got a busy week next, other halfs 30th birthday and my 31st so repair might get under way the week after.

 

[Ken_R]

Would these be what I should be using on the dremel.

Where are those listed/available?

Have we examined the possibility of bent valves/damaged guides? I'm sure we have but...........

 

[Ken_R]

Where are those listed/available?

Have we examined the possibility of bent valves/damaged guides? I'm sure we have but...........

Got half the answer. Die Grinder bits. I couldn't remember the name.

 

[Diddles]

Yeah most of the intake valves are bent. Exhaust valves look ok. Need to clean up the head and remove valves to check seats and guides etc.

 

[LostKiwi]

Thanks a lot guys for all the help and advice.

I was really disheartened about this but feeling like it could all work out now. Will update with the progress. Got a busy week next, other halfs 30th birthday and my 31st so repair might get under way the week after.

No problem. I was asking in case you were near me I'd give you a hand but you're a bit far away (I'm Northampton way). You're close to Alex so there's a bonus

With those bits get everything as smooth as possible. Avoid creating sharp edges so as to reduce the risk of hot spots causing pre ignition. Doesn't need to be perfectly smooth, just do your best.

With Dremels get a genuine one as in my experience cheap ones aren't up to the job. Go slowly and carefully and avoid the bore walls if possible (not that it matters hugely as the rings don't come up that far - more about not creating hard iron filings).

One final check is to put a straight edge across each bore with the piston at TDC and measure the gap using feeler gauges. They should all be very similar minimum clearance.

If they are then you're good to go.