Lost all power 1.8T agu - UPDATE Engine blown!

Thanks for the picture

Did his valves break up like mine then ?

I really want to know what caused this though. The engine was very strong when i was driving it last summer. I went to various shows in it, and all was ok

Im very intrigued to find out what has happened inside though. Will take it apart once i have the time.

 

Looks like the valve in the previous picture broke off at/near the collets and got mashed. I can almost guarantee there will be more damage to your head I'm afraid Rich

 

Thats ok. Im so glad i managed to get a strenthened AUM engine for piece of mind

Would fueling of been an issue to cause the valve to break off, or was this just a worn engine ready to blow

 

Were you using a k03s without being remapped to suit Rich? that would make it run lean on boost m8.

 

I think it was a k03 in the end Tommy

12 blades showing on the cold side, seen on page 2

 

My friend upgraded AUQ small port head when cam shaft splited to a large port AGU head. New head had good recon as new valve steams, valve grinding, all seals replaced, all gaskets, new cam belt set, new piston rings and much more. Engine starts OK and after 10 minutes warming up on idle speed the valve dropped. Dont know why and how, just happend.

 

Jees!! I hope that doesn't happen to my new engine

I was talking to my fellow mechanic today who does my MOT's. He mentioned fuel starvation ?

Could a faulty main pump cause the valves to break off like they did in my engine ?

I have no idea how old the fuel pump is ? It was bought ages ago with the fuel housing when i converted it to a GTI 8v. The lift pump was recently replaced with a new one from GSF.

For piece of mind i might buy a new main pump. Probably go for a k-jet one, as they flow better right ?

 

If it was the pump not being able to supply enough fuel under load, I would expect all cylinders to show signs of lean running and excess heat to be honest. You need to pull the head off the AGU Rich and check the combustion chambers.

Just had a thought, did this engine not have water/contamination in the ports when you got it? Was there anything in the exhaust ports?

Also, I can't remember now, did you have the cylinder head checked out prior to fitting the AGU? Just wondering whether there is some wear in the valve guides which could have contributed to the carnage. Exhaust valve guide wear is quite common on the 20v too.

 

Removed the cylinder head on the old AGU engine today, and was greeted with this











Now that's ****ed lol !!!

 

Next engine, get yourself some updated valves.







........................






And my 16v keeps chuggin along lol

 

lol

I think your right Edd

Not sure if this is correct or not, but I heard that the earlier AGU 1.8T engines are more prone to dropping valves than the later engines ?

The AUM in my Mk4 has done 125,000 miles, with a remap at 70,000, and has been absolutely fine.
As you saw at the Dyno day, its a strong healthy engine.

Just luck maybe ?

 

fueling.

 

You reckon ?

The AUM head was fine, but I was using different injectors with that.

 

ouch thats chewed up.

 

That's tough going, bin it and fit a TFSI, four less valves to worry about!

 

Hopefully by 2015