Head gasket pics and damage from detonation? Pics

[Schmauster]

I had compression coming out of my cooling system, tore it down and found some strange looking damage mostly on the rear 2 pistons. Guessing its from detonation but I havent seen it that bad... Just pock marks. Any idea whats up here? Guess ill be checking piston height.

[JetG0ld]

I had compression coming out of my cooling system, tore it down and found some strange looking damage mostly on the rear 2 pistons. Guessing its from detonation but I havent seen it that bad... Just pock marks. Any idea whats up here? Guess ill be checking piston height.

I cant really see the pic well, do you have a better one?

[Schmauster]

Ill snap some better ones later, its pouring outside.

Ill lighten it up, maybe it'll help for now.

[Schmauster]

Ok.. Cleaned the head up for the machine shop so you can see the marks better. Theyre pretty extreme.

Disclaimer : I got the car for cheap and realized it needed a head gasket. I only drove it home 2 miles, history of the motor is questionable. It was overheating pretty badly because of the head gasket so detonation wouldn't surprise me. Cylinder 1 doesn't seem to have any marks.. 2 has a little bit.. 3 and 4 are really bad. Cylinder walls look surprisingly good.

[Schmauster]

Took the head to the machine shop. He said it was detonation marks. He reminded me to look at the piston rings since they can break under those circumstances. The rear cylinder had a little more carbon so I wouldnt be too surprised. If thats the case ill be shopping for pistons (maybe even used OEM ones) or aftermarket. Stronger rods would be added either way.

[Schmauster]

Just curious about what cables and software people are running to change the fuel and ignition maps.. Im familiar with pulling EEProm chips and reading them with a willems.. Tuning done in tunerpro.

[M-Hood]

Took the head to the machine shop. He said it was detonation marks. He reminded me to look at the piston rings since they can break under those circumstances. The rear cylinder had a little more carbon so I wouldnt be too surprised. If thats the case ill be shopping for pistons (maybe even used OEM ones) or aftermarket. Stronger rods would be added either way.

Are there any marks on the head too?

[Schmauster]

Yeah marks on the head too. I can grind the quench pads down a little if they look like they will be a problem after machining

[Schmauster]

Pulled the oil pan so I can pop the pistons out and put new rings/hone the cylinders.

I dont have the plastic cover on the intake cam that im used to seeing on other peoples motors. The ATW should have one right? Missing parts/bolts are a running theme on this car.


Oil pickup tube pretty clogged up. The previous owner busted the oil pan on a rock and had to put a new one in. Judging by his sealant job on the oil pickup tube im guessing he took it off to clean it. My oil level sensor looks questionable. Looks like a broken off green PCB. Ill add the pic later. I would like to add that i will be running nothing but the cheapest synthetic oil after engine break in and changing it often.

[Schmauster]

Checked piston height, rods seem to be bent.

Pulled pistons out, rings are all in tact but lined up with the gaps in the same spot, so that didnt help compression.

Going to lightly hone the cylinders, get H beam rods, new rings. Im going to be looking into oem style pistons, or maybe even used pistons. Cant really afford all the downtime to save up for forged pistons.

Thanks guys

[GrapeBandit]

PM'd

I got EVERYTHING your need.

[Schmauster]

The waiting on parts and the machine shop starts..

[Schmauster]

Cleaned my pistons up enough to inspect them.. The detonation melted the side of the piston a little. Not worth running them







Looking at the set on ebay of scat H beams and wiseco pistons for around $760

[Schmauster]

Got the block to the machine shop. Everything going relatively smoothly so far. 82mm wiseco pistons and scat rods... bearings, etc

Torque converter bolts are 3 large stars. Regular star bits just huge. The flexplate bolts were 17mm 12 point

[Schmauster]

Looking for part numbers or a good parts website for the intermediate shaft (balance shaft thing) bearings

[Rodgman15]

Looking for part numbers or a good parts website for the intermediate shaft (balance shaft thing) bearings

http://techtonicstuning.com/main/ind...oducts_id=1354

[Schmauster]

Thanks for the link Rodgman... Ive got the bearings coming along with some other tidbits like a new dipstick tube, T fitting for breather, OEM thermostat etc

Got the pistons and rods in the mail so im dropping the pistons off at the machine shop in a few hours so they can get started on the block. I am cleaning all the parts (and the block/head when they come back) with castrol super clean soak and a wire brush. This includes disassembling the oil pump, oil cooler and installing new seals, oiling clean parts on everything engine related.. Lots of parts scrubbing while the motor is getting machined. I have a leak which looks like oil of some sort coming from under the drivers side headlight. I might be looking for advice for fixing it if its not obvious. Fixing any leaks I can as well. There will be a lot more progress in the future because the car needs a lot... Black seat covers for a heated seat, etc

Hats off to http://techtonicstuning.com for amazing service. Ordered my engine parts and a few hours later they called me to confirm that I had ordered the parts for the correct vehicle because the dipstick tube was wrong for the ATW. He was really helpful as i picked his brain with a few 1.8 questions. Their prices are pretty good too!


2002 Audi TT 225hp Injectors

[GrapeBandit]

http://techtonicstuning.com/main/ind...oducts_id=1354

for anyone else interested.
Audi/VW AEB 058 intermediate shaft bearings w/part numbers

since theres little to no information on the intermediate shaft bearings and Techtonics Tuning seems to be the only place that advertises to have them . . .
ill leave these part numbers here:

Federal Mogul/Sealed Power 1726M
Clevite SH1209S
ACL 2C1209S
Dura-Bond VWG-1
King Bearings CS230BB

[Schmauster]

Awesome Thank you for sharing that

[Mattr567]

Just saying none of your pictures work for me.

Try hosting them not just linking directly from your Google Photos.

[Schmauster]

Oh thank you for letting me know.. ill move them over, it'll make for a much better thread haha

[Schmauster]

Images should be fixed... i saw them all from my side so its hard to tell. Let me know if theres any not showing up


The oil pickup screen still had some stuff in it so i threw it into a hot fire for a few hours.. ill be cleaning it and it should be good to go.

Lots of cleaning of parts still, getting them ready for when the motor is done... hoping it'll be ready in a few days. I still have to clean up the engine bay and possibly get some obnoxiously bright paint for the block just for kicks.

[Schmauster]

Cleaned up the engine bay. Hoping motor will be ready from the machine shop tomorrow.

[Schmauster]

Detonation marks cleaned up well but still has deep gouges that I am worried about causing detonation/preignition. With the higher power levels Im hoping this doesnt cause me issues.

Had the machine shop install the eccentric shaft bearings. Block is ready, bored 1mm over and got a new exhaust valve.

[Schmauster]

Got the wrong head studs it seems... I have 10mm and I need 11mm. Glad I have the larger studs, too bad because it will slow things down. Should only take a few days to get here but the weekend is upon us.

I checked the head bolts I got with my gasket kit for reference and theyre 10mm also.. Anyone know if any other gaskets will be different?

[Schmauster]

[Schmauster]

The legs of the wheel barrow tell a tale.

Dumped the motor in the bay. Progress.

Cleaned and repacked a few accessory bearings that were slightly crunchy.. Nice and smooth now.


Can i reflash a 2001 manual ecu with an automatic file? Will that work with a wideband?

[M-Hood]

The legs of the wheel barrow tell a tale.

Dumped the motor in the bay. Progress.

Cleaned and repacked a few accessory bearings that were slightly crunchy.. Nice and smooth now.


Can i reflash a 2001 manual ecu with an automatic file? Will that work with a wideband?

You can change the soft code in the CH/M ECU for the 2001 to change them to work with Manual or Tip transmission.

As for the gasket set, did you end up ordering a 06A gasket set by mistake?


The ATW doesn't have a breather on the valve cover so it doesn't always have the plastic cam cover on the back but should have one at the front of the cam near the oil cap. But there shouldn't be any issues running without them, I never put mine back in when I switched to a AEB head on my ATW block and I even run a AWM valve cover with a line off the back going to my catch can.

[Schmauster]

Fired it up, lifters were a little loud then quieted down. Everything is great except apparently I didnt center my main caps...

Drove and sounded great till i took off the oil filter for an inspection.





The front thrust bearing seemed a little tight on assembly. Apparently it was. Pulling it back out and changing the bearing.. Hoping theres not other damage.

[Schmauster]

Thanks for posting mhood. Everything fit except the head bolts. The intake gasket was for a large port. I don't know if i got the wrong one.

I've got arp flexplate, crank pulley bolt and cam bolt. Stock flex plate bolts. Anything else outside the motor need to be stronger for around 500 hp?

[JetG0ld]

Thanks for sharing, I appreciate it. I may be in the same boat soon!

[Schmauster]

Head gasket problems? JetGold?


Once I get things sorted out ive been thinking about getting into some track events. I am a decent driver but have no experience in the legal racing world. Sonoma isnt far from me could be fun to hit it up with fellow Audi members.

More importantly I got the OK from the wife :)

[M-Hood]

Thanks for posting mhood. Everything fit except the head bolts. The intake gasket was for a large port. I don't know if i got the wrong one.

I've got arp flexplate, crank pulley bolt and cam bolt. Stock flex plate bolts. Anything else outside the motor need to be stronger for around 500 hp?

Kit most likely just didn't specify if it was for 06A or 058 which it should if it includes head bolts seeing the 058 uses 11mm and the 06A uses 10mm, might be why most head gasket sets don't usually come with head bolts. I always order the overbore head gasket set from IE since I find their head gasket to be the same thickness as the stock head gasket and not thinner, right around .076" thick.


No you should be fine with one you have for 500hp.

[Schmauster]

Thanks. I had to get the head and block decked so i need all the head gasket height I can get. Obviously I need a larger turbo, a good tune and most likely E85 for 500hp track/fun days.

[M-Hood]

Thanks. I had to get the head and block decked so i need all the head gasket height I can get. Obviously I need a larger turbo, a good tune and most likely E85 for 500hp track/fun days.

Yeah at that point you don't want to end up with a head gasket that is even thinner then stock since that will also just raise your compression more then it already is.

[vrmm]

More compression is always better. It's just the determination of how long it lasts ;) Iwasgonnasay don't buy forged pistons :o biggest waste of $$ I ever spent with straight meth. I do believe my circumstances with cracked aeb stock but not, thinner walled same pin diameter, and the inability to find used was the only reason to. Theyll get just as effed up when you set the revlimiter 100 rpms more than you should've. ATW is 800bb is it not? I guess even 400 works with tunerpro so that is definitely the route i'd take. Perhaps start a base bin from maestro stage3 or well I guess I have like a million 1300cc+meth files.

[Schmauster]

Thanks for reading and the great info VRMM

I wanted to go 2mm overbore with stronger piston pins etc anyways (maybe ill end up with 2.5mm) and when you factor in no used pistons in great shape and the price of new ones its worth the money. My plan is to build it strong and hopefully it'll last at 300 daily and 500hp e85. These numbers are subject to change haha

I have an E85 compatible walbro, Audi TT injectors and a 2001 ecu + vag cable etc to play with when it gets running. Maybe ill buy some 1300cc injectors, meth setup if you had a tune that would work with my setup that you would be nice enough to sell me. Would be nice to use it as a base map. Oh yeah i need a big intercooler too :)

I am new to Audis but have previous turbo experience. I have yet to do much research on Audi ECUs. Im hoping to use the wideband ecu for initial tuning if it can handle the injector size.

Turbo selection is still on the table.. Exhaust will be a DIY job unless i find a good deal locally.

[Schmauster]

Aaaand back out. Pics of the damage to come

[Schmauster]

Main bearings look okay.. Ill still run them.. havent looked at the rod bearings or eccentric shaft, my bet would be the eccentric shaft bearings at this point. Hope its not metal from the cams/ head.

I am no engine expert (and new to Audis) There are a few very small chips in the bearings, ill get a pic of the missing top coating. The bearings look pretty uniformly worn/damaged with the damage getting a little worse going from #1 being almost spotless to main cap #5 being the worst. Ive seen this with oil starvation since #5 is the last to get oil.

Im not big on shiny right side of that bearing, almost looks like it was tight on that side?

When I tore it down originally it didnt show any problems with oiling.

[Schmauster]

Ive taken most of the motor apart. The only thing that looks questionable is the cam journals.. Ill have to get them mic'd out at the machine shop. Bent cams are a long shot but I know this motor got pretty hot before I owned it.

Still have a little poking around to do in the motor... Dealing with our 2000 4runner's blown head gasket / exploded plastic radiator for now as well as other life things.