B8 motor rebuild options

[angrypanda]

I've got the chance to pick up an 09 avant 2.0t with a bad motor cheap. Didn't say what's wrong, just that it would need a new motor or full rebuild.

Around here there are no motors available for less than ~$4k (tax, shipping, USD conversion).

Finding lots of threads for people who had to replace a motor, not so many internal build threads... Is this for good reason, or are they just not cheap enough that people are tearing into them like the B5/B6s?

The idea would be to keep it a daily, aiming for ~300-350 hp. Is the B8 motor any good once built? Can the oil/timing issues be overcome, or is it just a fault in the design? Can the 6speed auto handle that long term?

I've found a few threads that just sort of ended after saying to get a B8.5 motor; but that's not really an option, and apparently non US ecus do not plug and play (said one such thread).

I will be doing my own work and am completely comfortable rebuilding the motor. I'm currently rescuing my 7th B5 A4, and am running my stage 2 B6 avant as my daily.

Sorry for not spending more than 2 hours reading/searching, but I'll need to pull the trigger quickly or may miss my chance.

Thanks.

Obligatory pic:

[CoyneJ]

Check the compression and look through the oil fill to see if there's signs of poor maintenance, my guess is the timing tensioner failed and bent the valves but it could be anything, your best bet it to tear down the block and see if it is savable and you can get it checked out by a machine shop, integrated engineering will run you around 2k for rods, pistons, bearings, and valves if they are bent you can get in contact with them and they will help you out with the process

[pierreb]

300hp you'll need k04 or better and wm. Once you fix timing tensioner and pistons the engines are very decent. Pretty typical audi to have $5 parts ruin $15,000 engines.

[angrypanda]

So the oil issues are piston/ring based? (Sorry, that thread was like 60+ pages and I was not reading all that last night)

Is there an upgraded tensioner readily available?

[IHave2Turbos]

can you scan it and look for codes? Timing chain tensioner failure will pop codes. You can try to take the VIN to a dealer and see if they can provide you with the service records (your results may vary). You can see if it had Stage1 or Stage2 oil consumption recalls done.

[Zach L]

If I were going to hassle with any rebuild on these motors, I'd replace pistons and rods with aftermarket forged pieces. The cost difference for the better parts is negligible.

[Project Quattro]

So the oil issues are piston/ring based? (Sorry, that thread was like 60+ pages and I was not reading all that last night)

Is there an upgraded tensioner readily available?

It's the rings, IIRC, I read somewhere that they basically didn't make sure the gaps were 180 degrees off so oil would get through. No idea if that's true, but the fix for consumption is a replacement of the pistons and rings.

Tensioner is DIYable, and yeah there's a new version that solves the problem. A few people have built engines and they handle power fine.

K04s (lettuce (6AT), allroadcorbin (8AT), lambda13 (6AT)) and EFR turbos (slowone11) have the output you're after and are still DD-able.

[Shaph]

Isn't Slowone11's turbo a LOBA400?

[Alex1188]

Isn't Slowone11's turbo a LOBA400?

Yes and he is running bigger injectors, and bigger fuel pump. He has probably the highest power output of anyone on the forum if I recall right.

[Shaph]

Odly there's a chap here from Russia with a LOBA380 making 380whp

[lettuce]

I wish someone with a Loba here would run a 1/4 so we had more than corrected dyno numbers to go off of. Always interested in seeing what options are out there and the Lobas seem like they could be great turbos.

[jkaudia5]

Hey Guys
I have a B8 A5 that had a spin rod due to the oil issues it seemed. My car was being checked for Oil Consumption and during that my engine blew.
They put in,under Warranty, at 51k miles, a new full block from Germany.
No rebuild or anything.
My question is do you think that was a B8.5 2.0 full block and does anyone know how I could check? It would be SOO awesome if this was the case:). I have now 96k and it's kicking a$$. Tons of mods waiting to put in after my Warrenty is up. Thanks guys!!


VAG Love.

[Phantomas]

Piston rings are the main problem. New one doesnt fit old pistons as they are 23mm instead 21mm old, so U need new pistons and conrod. Or U can cutin for 3rd ring to fit in piston :)


Sent from my iPhone using Audizine

[Shaph]

You mean the writs pins?

[b8_Jeff]

I am currently in the same boat. I emailed integrated engineering to see what my options are... hopefully built engine with k04 (or bigger).

[Shaph]

I am currently in the same boat. I emailed integrated engineering to see what my options are... hopefully built engine with k04 (or bigger).

That pretty much what im doing. IE mahle Pistons. IE Rods, IE vlave springs and Ferrera Valves. along with an EFR6758

[angrypanda]

That pretty much what im doing. IE mahle Pistons. IE Rods, IE vlave springs and Ferrera Valves. along with an EFR6758

And what did that package run you?

[Shaph]

And what did that package run you?

Close to 10kusd however I had to pay postage to Australia plus I picked up a HPA intake manifold

[Jaydog0910]

My engine is being rebuilt right now. Replacing the pistons/rings will fix the oil consumption problem. The timing chain tensioner also fails, so you will want to replace it and while the car is dismantled you will want to clear out any carbon buildup caused by the injectors.

After that the engine should be great, these 3 things seem to cause the most problems for us. If i were you, I would try to verify that the tensioner didn't already fail. If that happened already I would pass on the car even if you know what you are doing. It will almost certainly need a new engine.

Regardless, It won't be cheap or easy to get 300-350HP out of it. I have a 2010 2.0 quattro with APR stage 2 and a HFC and I'm ~290HP and ~350TQ. The car is still super fun but not it's not going to get to 350HP without some significant work. I didn't want to modify my car that much so I found stage 2 a good blend between performance boost, $$$, and not heavily modifying the car.

I know many people run K04, that will definitely get you more bang, but I don't have one so I can't comment.

[angrypanda]

My engine is being rebuilt right now. Replacing the pistons/rings will fix the oil consumption problem. The timing chain tensioner also fails, so you will want to replace it and while the car is dismantled you will want to clear out any carbon buildup caused by the injectors.

After that the engine should be great, these 3 things seem to cause the most problems for us. If i were you, I would try to verify that the tensioner didn't already fail. If that happened already I would pass on the car even if you know what you are doing. It will almost certainly need a new engine.

Regardless, It won't be cheap or easy to get 300-350HP out of it. I have a 2010 2.0 quattro with APR stage 2 and a HFC and I'm ~290HP and ~350TQ. The car is still super fun but not it's not going to get to 350HP without some significant work. I didn't want to modify my car that much so I found stage 2 a good blend between performance boost, $$$, and not heavily modifying the car.

I know many people run K04, that will definitely get you more bang, but I don't have one so I can't comment.

Thank you for the concise post. I imagine it will be the tensioner. I expect to hear back shortly.

If 290 is relatively easy to reach, that would likely be satisfactory... At least for a while. I'm not hard set on 350, but would want to be able to notice the upgrade from my stg 2+ b5 and stg 2 b6.

[Shaph]

Wait isn't someone here making 330whp on stock block and K04?

[lettuce]

Wait isn't someone here making 330whp on stock block and K04?

I would say anyone with a K04-sized turbo is pushing anywhere from 300 to 350 at the wheels, both ft lbs and hp, depending on dyno type and conditions. Almost all on stock blocks.

[angrypanda]

"Yes/ will need a complete new motor broken pieces of metal were shifted through the motor and pulled through oil pump replacement is the answer"

This is the update from the seller... Gross.

[b8_Jeff]

That pretty much what im doing. IE mahle Pistons. IE Rods, IE vlave springs and Ferrera Valves. along with an EFR6758

10k huh? guess I will have to plan for that haha. granted it will probably be 9k or so for myself since I don't have to pay for shipping to Australia. would love to see what you put down hp wise after the upgrades. any plans on dyno? custom tune as well?

[Shaph]

Yeah. 10k not including turbo or intercooler. Hopefully engine will be back this week. Had a delay. Incorrect wrist pin for the Mahle Pistons. Definitely will be custom tuned hopefully low 400s. I really want 420hp (blaze it)