Mk7 engine trouble

[rob hall]

Hi my mk7 130bhp fwd tourneo put a hole in a piston at xmas ,
So i took the engine out and rebuilt it i.e 4 new pistons and rings, new valves, complete engine gasket set . After refitting the engine the engine was running lovely for a hour or so. Then suddenly the engine cuts out and it strugled to restart again . When it finally started i opened the bonnet to to find out i have preasure coming out of my oil filler cap .
I have removed the engine and striped it down but cant find a fault ! Has anyone on here had a similar problem ?

[wronghole]

People on here will say loose injectors. I agree, first port of call check injector clamps r tight

[ake]

Almost certainly injector washers/clamps

I hope you had injectors checked if they are the ones that melted the piston

[rob hall]

How can i tell if the injectors seal / clamps are the problem what are the signs ?
The piston had cracked not melted .

[karl]

How can i tell if the injectors seal / clamps are the problem what are the signs ?
The piston had cracked not melted .

the reason it was cracked holed is because the injectors are faulty when you rebuilt the engine did you also do the pump/injector learns and rest all counters etc

[rob hall]

Nope

[andz327]

Injectors will need new fire washers and new bolts

[rob hall]

I have had the injectors tested , all 4 are knackered !
How can all 4 injectors be knackered ??

[karl]

I have had the injectors tested , all 4 are knackered !
How can all 4 injectors be knackered ??

comon on these the worst fuel system on the comon rail system denso

[rob hall]

£183 + vat each! really ???

[ake]

I have had the injectors tested , all 4 are knackered !
How can all 4 injectors be knackered ??

They would have failed one at a time, until it died

[andz327]

TPUK do new injectors for £150 each and you can reconditioned at around £75 each on ebay

[Transitpartsuk]

Yes we do, genuine Denso, brand new at £150 and Reman by Denso agents at £125 both with 12 months warranty