Station cott 1
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Hi please could I get help I have a 200 tdi engine with pistons that have ERR 1388 stamped on them are these pistons standard size thanks
200 tdi pistons
- Thread starter Station cott 1
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Anaconda
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Not sure but mine had std stamped on the top.
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No they are slightly larger, just the tolerances from the factory. Standard pistons are ERR1390 & ERR1391.
Station cott 1
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So if I needed a replacement piston will I have to get one with the same number or is there an equivalent piston with a different number on say std 1052040
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You need to measure the bore & buy one to suit there are loads of suppliers of aftermarket pistons
Std 1052040 is =40 tho
If it was my engine I wouldnt be replacing one piston, id be doing the lot & have it machined so they are all the same.
Whats wrong that you need a piston.
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Station cott 1
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The side of the piston is all rough had been stood for a while so water has got in and damaged it thank you for your reply I’m not really familiar with these engines 2 of the pistons have 1387 on them and two have 1388 will standard rings work on the pistons or do I need others for each oneYou need to measure the bore & buy one to suit there are loads of suppliers of aftermarket pistons
Std 1052040 is +20 thou
If it was my engine I wouldnt be replacing one piston, id be doing the lot & have it machined so they are all the same.
Whats wrong that you need a piston.
Anaconda
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steve2286w
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You need to measure the bore & buy one to suit there are loads of suppliers of aftermarket pistons
Std 1052040 is +20 thou
If it was my engine I wouldnt be replacing one piston, id be doing the lot & have it machined so they are all the same.
Whats wrong that you need a piston.
The 040 at end of part number shows it’s 40 thou oversize rather than +20
steve2286w
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Yes standard size, the different numbers explained below relate to the actual standard bore size and which pistons required to get correct clearance
steve2286w
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Can you post a pic of piston also bore tops , if you can feel a ridge at top with fingernail then bore is worn, if you don’t have bore measurement kit , then a local engineering company should do it for £20ish,
I measured mine with borrowed gear and was very close to local machine shop , gives a bit peace of mind ,
If you can’t feel a step not worn and just buy same piston for same bore if it won’t clean up
You can measure rings in bore too for end gaps with feeler gauges
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Oppps never noticed that wiv me fat fingers n me phone
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He could just try honing the bores if there is no lip, once done he'd have a better idea of what needs doing, if anything further. But noo rings deffo.
Station cott 1
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steve2286w
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Bores look good not glazed annd can’t see any step at top and as Stanley says just a hone might be needed to clean up that discoloured one too.
Piston looks eaten away as if by electrochemical erosion ? But if bore cleans up ok just buy same piston
Piston looks eaten away as if by electrochemical erosion ? But if bore cleans up ok just buy same piston
Station cott 1
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What’s the best hone to use
Without measuring everything I will say it all needs checking by someone that knows.
J
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Lot of info here.
The Perfect Finish: High-performance piston rings require “fool-proof” cylinder honing
ABOVE: To facilitate proper cylinder bore surface preparation and piston ring-to-bore fit, high-performance ring manufacturers and distributors recommend the honing of cylinder bores with the BRM F…
racer.com
The state of the top cylinder is a bit worrying from the pic, the rst should be alright. but if you need to rebore or resleeve that is another story.
Station cott 1
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Do you know the measurements in mm for a std 1052020You need to measure the bore & buy one to suit there are loads of suppliers of aftermarket pistons
Std 1052040 is =40 tho
If it was my engine I wouldnt be replacing one piston, id be doing the lot & have it machined so they are all the same.
Whats wrong that you need a piston.
steve2286w
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Standard is the original size as on above diagram
That one 1052020 means 20 thou oversize on the diameter or 0.5mm larger
Have you tried to clean up the stained cylinder if it cleans up ok it might be fine
