What engines can fit in a b6 S4 avant

**jhoward** · 03-04-2017 08:49 AM

So I had my engine pulled out of my S4 to do the timing chains. After seriously considering the expense of just the parts alone, and the fact that this engine consumes a good deal of oil and has 115,xxx miles on it

Perhaps it's time to just consider dropping something else in it instead. The car is gorgeous, I love it, and the rest of it is in pretty damn good shape

If you were my position what would you drop in it/do? Do any of the newer RS4 engines fit? Like if I miraculously find one that's been in a wreck? I've always wanted an RS4 avant, but importing one seems close to impossible. Perhaps cobbling one together from parts is the answer.

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**Mr.Wrong** · 03-04-2017 09:06 AM

Originally Posted by jhoward

So I had my engine pulled out of my S4 to do the timing chains. After seriously considering the expense of just the parts alone, and the fact that this engine consumes a good deal of oil and has 115,xxx miles on it

Perhaps it's time to just consider dropping something else in it instead. The car is gorgeous, I love it, and the rest of it is in pretty damn good shape

If you were my position what would you drop in it/do? Do any of the newer RS4 engines fit? Like if I miraculously find one that's been in a wreck? I've always wanted an RS4 avant, but importing one seems close to impossible. Perhaps cobbling one together from parts is the answer.

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Swap a BNS in there, you'll be much happier

**VinnysS4** · 03-04-2017 09:14 AM

LS7......

**Nollywood** · 03-04-2017 09:37 AM

2.7T
1.8T BAT
4.2 V8 40V 077 series.

**jmcS4** · 03-04-2017 11:04 AM

I don't think the old 4.2's fit. isn't that why Audi designed the BHF since it smaller and actually "fits" in our bays?

**jakeoboy67** · 03-04-2017 11:11 AM

Originally Posted by jmcS4

I don't think the old 4.2's fit. isn't that why Audi designed the BHF since it smaller and actually "fits" in our bays?

that is correct , the chain system made it shorter to fit in the 8E chassis.

**kevinye77137** · 03-04-2017 11:25 AM

Ls3....

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**mace115** · 03-04-2017 11:26 AM

For me it would depend on how much time I had to sink into the project.

If time was a concern I'd probably find another used BHF in great shape and use that.

If time was not an issue I would throw an LS in there (Like Vinny said)
https://www.youtube.com/watch?v=cuHwCgokPpE

An LS Avant would be incredible.

**emilio** · 03-04-2017 11:31 AM

the only things that would truly fit wouldn't be as good as the BHF. (LS blocks do not appear to fit without extending the radiator.)

i would either resurface the bores and re-ring the pistons, find another BHF, or find another car.

- emilio

**Kambesama** · 03-04-2017 01:36 PM

SMART FORTWO ENGINE MOTOR 1.0L...... JK JK

**jakeoboy67** · 03-04-2017 02:25 PM

I have yet to see the supercharged 3.0 V6 from the B8+ S4 in a B6/B7

**dsgray16** · 03-04-2017 03:46 PM

Originally Posted by jakeoboy67

I have yet to see the supercharged 3.0 V6 from the B8+ S4 in a B6/B7

Yeah because it would be a nightmare of build..

**dsgray16** · 03-04-2017 03:48 PM

Even the B7 RS4 motor is a massive pain the balls to swap in. Anything newer would be worse do to further modifications needed to mount the motor, fit it to your trans, and wire and fuel it properly.

Just find a used engine with like 50k miles. Or you could 2.7tt swap it if you have the time and money.

**neilpaku** · 03-04-2017 08:05 PM

Easiest option is is new valve guides and seals, new piston rings, and timing chain guides. You won't have to monkey with any fitment. I just did those on mine, I'm at 2000mi on the first oil change and it's halfway down the stick. It was refurbished at 160k. I'm expecting to go the whole 5000mi oil change duration without having to top up. This engine used to use almost a quart per tank of gas previously...

**Nollywood** · 03-04-2017 10:49 PM

Originally Posted by jmcS4

I don't think the old 4.2's fit. isn't that why Audi designed the BHF since it smaller and actually "fits" in our bays?

It fits.

**jmcS4** · 03-04-2017 11:31 PM

Originally Posted by Nollywood

It fits.

Pics?

**Dirtracer603** · 03-05-2017 05:47 AM

I have a good used S4 4.2 49,000 mile long block I am trying to sell....bought it off EBAY 2.5 years ago but never followed through with putting it in my car.

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**jhoward** · 03-05-2017 09:41 AM

Originally Posted by Dirtracer603

I have a good used S4 4.2 49,000 mile long block I am trying to sell....bought it off EBAY 2.5 years ago but never followed through with putting it in my car.

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Pm me your number, and an offer - I may take you up on it. Need to see what shape mine really is in.

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**jhoward** · 03-05-2017 09:45 AM

Originally Posted by mace115

For me it would depend on how much time I had to sink into the project.

If time was a concern I'd probably find another used BHF in great shape and use that.

If time was not an issue I would throw an LS in there (Like Vinny said)
https://www.youtube.com/watch?v=cuHwCgokPpE

An LS Avant would be incredible.

That sure sounds nice! Ok pardon my lack of engine knowledge- what exactly is an LS. My poor car has been stranded for over a year now- time is no longer an issue

Thanks all for the replies and the info

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**Nollywood** · 03-05-2017 09:54 AM

Originally Posted by jmcS4

Pics?

None as yet. But, rest assured, it does fit. This is part of my current project.

**jhoward** · 03-05-2017 11:14 AM

But does the twin turbo rs6 engine fit?

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**VinnysS4** · 03-05-2017 11:56 AM

Originally Posted by jhoward

That sure sounds nice! Ok pardon my lack of engine knowledge- what exactly is an LS. My poor car has been stranded for over a year now- time is no longer an issue

Thanks all for the replies and the info

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Chevy corvette engine. It is the basic platform in a lot of cars like the camaro, Cadillac ctsv, vette, Chevy trucks etc.... arguably one of the best v8 platform to start on..... And and it been done before:

http://ls1tech.com/forums/forced-ind...me-pics-4.html

**pwest15** · 03-05-2017 02:59 PM

Honda SR20

**jhoward** · 03-05-2017 03:04 PM

Originally Posted by VinnysS4

Chevy corvette engine. It is the basic platform in a lot of cars like the camaro, Cadillac ctsv, vette, Chevy trucks etc.... arguably one of the best v8 platform to start on..... And and it been done before:

http://ls1tech.com/forums/forced-ind...me-pics-4.html

Damn that's bad ass

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**65vetteC6** · 03-05-2017 03:47 PM

That car looks like poo IMO. There is no point in stuffing in an LS if the car has to get hacked up, nothing really impressive about it. There is an RS that someone stuffed a LS in by cutting the firwall and making it RWD I believe and actually looked normal from the outside.

My .02 cents having done a 2.7 swap on my old avant is don't. Just fixing the car with an OEM motor and continue to drive and enjoy it. If you have tons of time and want to swap something unique or lots of money to pay someone to do it, go for it but a good majority of the swaps done are done on the cheap and not to the full extent they should be done. Just my opinion, 2.7 swaps are a dime a dozen these days too, you'd probably be happier picking up one that is running and sell yours.

**jhoward** · 03-05-2017 08:55 PM

Originally Posted by 65vetteC6

That car looks like poo IMO. There is no point in stuffing in an LS if the car has to get hacked up, nothing really impressive about it. There is an RS that someone stuffed a LS in by cutting the firwall and making it RWD I believe and actually looked normal from the outside.

My .02 cents having done a 2.7 swap on my old avant is don't. Just fixing the car with an OEM motor and continue to drive and enjoy it. If you have tons of time and want to swap something unique or lots of money to pay someone to do it, go for it but a good majority of the swaps done are done on the cheap and not to the full extent they should be done. Just my opinion, 2.7 swaps are a dime a dozen these days too, you'd probably be happier picking up one that is running and sell yours.

Thanks for the honest answer. I dont want to put something ridiculous in it, just something that works, maybe something fun

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**dsgray16** · 03-06-2017 05:31 AM

That S4 with the LS looks completely ridiculous. Just buy a damn corvette if that's what you are after.

Jump on that low mile long block that somebody posted up.

**q_dubz** · 03-06-2017 05:37 AM

do fresh rings annnnnnnd boost it.

**emilio** · 03-06-2017 08:35 AM

Originally Posted by emilio

i would either resurface the bores and re-ring the pistons, find another BHF, or find another car.

Originally Posted by neilpaku

Easiest option is is new valve guides and seals, new piston rings, and timing chain guides.

Originally Posted by q_dubz

do fresh rings annnnnnnd boost it.

we are now the "Ring Caucus".

- emilio

**VinnysS4** · 03-06-2017 08:45 AM

I vote rings.

**AudiA4_20T** · 03-06-2017 09:27 AM

Originally Posted by Nollywood

2.7T
1.8T BAT
4.2 V8 40V 077 series.

Yep!

Originally Posted by jakeoboy67

I have yet to see the supercharged 3.0 V6 from the B8+ S4 in a B6/B7

Originally Posted by dsgray16

Yeah because it would be a nightmare of build..

Not really. One guy did it in a B6 but never finished. I think in a B7 it should be fairly plug n' play. They both use Siemens ECU systems. If I had enough time and a garage this would be my next swap.

**q_dubz** · 03-06-2017 09:28 AM

Originally Posted by AudiA4_20T

Yep!

Not really. One guy did it in a B6 but never finished. I think in a B7 it should be fairly plug n' play. They both use Siemens ECU systems. If I had enough time and a garage this would be my next swap.

No...B6/B7 is Bosch, B8 is Siemens.

**Nollywood** · 03-06-2017 09:40 AM

Originally Posted by q_dubz

No...B6/B7 is Bosch, B8 is Siemens.

Some B7's run Siemens. It depends on what engine the car left the factory with.

**Nollywood** · 03-06-2017 09:42 AM

Personally, if a car needs to be chopped up to get an engine to fit, it shouldn't be there.

That B6 S4 looks a mess.

**q_dubz** · 03-06-2017 09:50 AM

Originally Posted by Nollywood

Some B7's run Siemens. It depends on what engine the car left the factory with.

Hmph, well then. I'll go back in my corner. lol

**AudiA4_20T** · 03-06-2017 10:56 AM

Originally Posted by q_dubz

Hmph, well then. I'll go back in my corner. lol

B7 A4 2.0T= Bosch
B7 A4 3.2 = Siemens
early B7 S4 = Bosch
later B7 S4 = Siemens. Surprised me too.

**blitz2190** · 03-06-2017 11:36 AM

also from what I've gather the older belt 4.2 fits if you remove the fans and get a pusher style fan instead, correct me if I'm wrong nollywood. A 4.2 turbo has been a bit of a dream for me in the b6. Also the 2.7 swap is dead simple if you know what you are doing, pretty much everything has been covered now.

**BCsniper** · 03-06-2017 12:44 PM

A 4.2 V8 fits in the back of the Avant also.......you know, in case anybody was wondering. I actually found it fits a motor and cherry picker both quite nicely

**jhoward** · 03-07-2017 10:25 AM

Found a brand new BHF for just under 6k, and a used one with 50k mikes for 4.3k

My engine is in the other post with the F'd up bolt that's hardened itself into the block (see picture below).

Apparently there's only one BNS engine for sale out there at the moment.

How bad would it be to put one in. Can I use the mt6 drive train that's in the car, or do I have to switch that out too?

Here my engine from another post - the chain guide broke and was rubbing on the bolt that held it in. It has hardened and my mechanic is still trying to drill it out

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