Lost all power 1.8T agu - UPDATE Engine blown!

You'd be mad to put anything but another 20vt in!! Just look for a decent agu, with lowest mileage as possible... If you're staying k03s etc then again, as before, it needs no mods before fitting. im days away from starting to use my mk2 agu, I hope this sort of thing doesnt happen to me! Its been nearly a year long project as is!! Already had previous years of problems with every type of 16v engine!!! Rich, did you get those cheap g60 brakes in the end I informed you of?

 

Would love to

Already been reading this guide

http://www.qpeng.com/other/home/conversion_guide_tfsi_-_mk2.html

Too much work, but would be fun

Not really a fan of the ABF tbh. Its a great engine, but i do like the 20vt's, especially for the power gains from just a remap.

As you said, ive spent alot of on the loom, turbo, ect ect, so it might be easier to stay with it. Still undecided though ...

Yea i know, it would probably be easier to stick with the 20vt.

I didn't go for the discs in the end. Ive bought the pads, and was going to buy some discs next weekend. Not sure what ones to go for though ?

 

I managed to find the time to strip the engine down a little, removing most of the bolt on parts.

Before:



After:



Look at the valve in this picture from cylinder 3





I wonder what caused this to happen though ? .....

 

It's trying to tell you that 20v is 4 valves too many, look one tried to escape!

Hope you get it all sorted & back on the road soon Rich

 

im out of ideas. outside odds on the end dropping off the plug, or another foreign object

 

lol

Yeah, i hope to whip the engine out tomorrow to make way for a new one

Its a strange one!

The power was down that day, felt like there was no turbo at all! I put it down to the quiet Jetex and airbox, but wonder if it was related somehow ?

 

My Mk4 (aum) uses these plugs, and has been fine the last 10,000 miles with them in. Its got me worried now

I think the AGU engine was ****ed from the start! Remember the issues i had getting it to start at first.

I have done a few thousand miles on that engine though, was strange that it seemed to happen all of a sudden, after 2.5 hours driving it.

 

i use Denso 0.8mm gap platinum plugs, change them typically once a year. how old were the plugs on the agu?

if plug failure caused the death of that engine im completely gutted for you

any joy with replacement engine?

 

Not that old Matt tbh. The engine had a full service before it went in. Plugs, oil, filter, belts, tensioners, ect.

I'll be ****ed off if it was plug failure which caused the death of the engine. I suppose i'll only know once i get the head off and have a good look.

Everyone i have showed have been shocked at the way the plug looked! I doubt any loose debris caused it, as i normally let it run for half hour or so when im around the garage, especially if it been sitting for a few days.

But as i said above, the engine didnt feel right at all! It was definitely down on power that day. I'm personally putting it down to a worn engine.

Remember this when i bought it -



http://www.clubgti.com/showthread.php?250604-Seized-Crank-Its-Alive-)-!!!/page2

It might have damaged the valves back then ?

 

As far as i can see, cylinder 4 looks ok, and the plug looked good to.

Not sure why the compression was so low on 4 though ?

I'll update once i get the head off

 

Need to buy a cylinder head bolt tool now!

 

sorry but i think you have more of a problem than just one valve or plug failing, if that was the case then it would run still on 3 cylinders, has the cambelt jumped when the damge was done

 

Iv got one I can post down to you if needed

I'm sure badger bill had problems with electrodes falling off certain plugs speak to him to confirm thou mate

 

Just reading this for the first time, really bad luck...

Do you run an AFR gauge? If so what was it reading? Looking at the plug from number two it's been running lean, that's probably damaged the plug causing the poor performance, then its failed taking the valve out and the rest is evident...

The pic of the turbo shows the cold side of the turbine, have you inspected the hot side of the turbine impeller for damage? If anythings gone through it that's where it will show... Good luck with the rebuild.

 

Thanks for the offer mate

Was thinking of buying one tbh, as it woul be good to have in my VAG toolbox , plus I was planning on removing it this weekend.

Do you know what size tool I actually need ?

Was thinking the same tbh. Might be a damaged piston then?
The timing marks are all correct.

Hi pab

I wasnt running a afr gauge unfortunately

Your diagnosis sounds right tbh. The performance that day was very poor compared to how it was running last year.

What normally causes the 20v engines to run lean then Pab ?

 

Could fueling be an issue here ?

I'm using a digifant fuel pump, and a new lift pump ?

Was running fine last year. It was driven to inters last year, and a few more shows, as well as weekend blasts.

 

Think Rich its a ribe 9mm for the head bolts

 

Thanks mate

Hopefully halfords will have one today.