Hello people,

I'm a new member to this forum.

Sorry for the essay but here we go!

My Audi A4 1.9tdi awx (130) has covered 167K it was full VAG history up to 140K and since I have owned it I have had it serviced using all of the correct genuine Audi parts including the £16 a litre oil.

Roughly 2.5miles ago I had a longlife oil service and almost straight away the engine started to sound tappety, 700miles later & No3 tappet exploded killing my top end.

Stipped the rocker cove off to find the damage was done including all of the tappets were cracking and the cam lobe on No3 cylinder was scored badly (no3 tappet seating in the head was trashed too).

I sourced a brand new head (AMC) from a Cylinder head specialists called “Corrys” based near Tring in Buckinghamshire. I supplied them my old head of which they re used what they could (Valves, injectors and injector cams & harness). They put it all back together with a new cam and tappets. Basically they rebuilt the head so all we had to do was to refit it back on the block.

The only issue I had was that when we stripped the head originally we removed the injectors but did not note which cylinder they came from so the injectors were not put back into the original positions that they came from.
I’m not sure if the injectors will need to be re-sequenced back to where they are now via VAGCOM or does this matter at all? I have made a note of the injector id as to where they are now.

We put the engine back together using all genuine VAG parts along with the correct locking tools to time the engine up correctly. We flushed the engine through and now I’m running with Quantum fully synthetic oil (I’m now going down the road of oil service every 5k) Fingers crossed the oil will not sludge up now as it did with the long life service.

The issue I have with the car now is that there is a noticeable misfire in 4th and 5th gear at around 1500-2000rpm.
I have changed the fuel filter today but this has not cleared the issue. Could it be a problem of the injector sequencing or could it be the internal injector harness. I did replace the MAF about 3K ago so I’m currently ruling that out however the car still does not seem to be boosting as well as it did.

I have also replaced the intercooler seeing the original one was split down the seams and was blocked with old oil and road muck.

The only other thing I did notice was that the wiring harness going upto no2 glow plug was split showing the wire, I have taped it back up but I’m not sure if this is making any sort of further electrical problem?

I have not had the car read for any codes yet though.

Any ideas / advice will be appreciated

Cheers,

Buzz