Update on my S4... it's in bits and pieces

[halik]

Finally got some time to tear it down. Low compression on #8, leak down suggests rings and/or scored cylinders.

So it looks like I'll be needing a new short block. Wet compression test got 11-12.5bar across all 8, so I'll most likely reuse the heads.

 

[thescreensavers]

^ Oh that looks fun

 

[PhoKingGuy]

Holy fvck that looks like a rats nest, how the hell are you supposed to do anything in there without dropping the whole thing.

 

[jlee]

Why a new shortblock? Can't hone/re-ring, or go 20 over with new pistons?

 

[halik]

Why a new shortblock? Can't hone/re-ring, or go 20 over with new pistons?

Alusil block. Huge pain in the ass to redo - need to etch or recoat the walls.

 

[shabby]

Holy fvck that looks like a rats nest, how the hell are you supposed to do anything in there without dropping the whole thing.

Im sure the service manual goes something like this...

To remove exhaust manifold, remove engine.
To remove alternator, remove engine.
To remove oil cooler, remove alternator by removing the engine first.

 

[jlee]

What year & how many miles? I'm starting to appreciate my motor even more now

 

[exdeath]

Lol , DOHC V8s are so much fun to work on.

 

[vi edit]

Lol , DOHC V8s are so much fun to work on.

Maybe so. But that's a twin turbo 2.7l V6.

 

[halik]

what year & how many miles? I'm starting to appreciate my motor even more now

04 100k

 

[halik]

Maybe so. But that's a twin turbo 2.7l V6.

Hah, no it's a DOHC v8. My other car is the 2.7T v6

 

[exdeath]

Maybe so. But that's a twin turbo 2.7l V6.

Looks like a 4.2L DOHC V8 to me. And to quote OP "Low compression on #8" and "Wet compression test got 11-12.5bar across all 8"

 

[iamwiz82]

Maybe so. But that's a twin turbo 2.7l V6.

Then he shouldn't have much to worry about since cylinder 8 is the issue

 

[vi edit]

Then he shouldn't have much to worry about since cylinder 8 is the issue

Ah damn. I was confusing Haliks cars. He had a 2.7T A6 I thought he swapped it out for a B5 S4.

 

[exdeath]

That engine looks weird in the front. Never seen an engine with the timing chains in the rear before.

 

[Demo24]

That engine looks weird in the front. Never seen an engine with the timing chains in the rear before.

Was done just for this model. That year range A4 doesn't have the largest of engine bays so accommodations had to be made to get that 4.2 in there.

 

[AMCRambler]

What's a short block 4.2 for an S4 run?

 

[Raduque]

What happened to it?

 

[CRXican]

lol at you, I win

http://forums.anandtech.com/showthread.php?t=2053277&highlight=

 

[halik]

What happened to it?

lol at you, I win

http://forums.anandtech.com/showthread.php?t=2053277&highlight=

Bought it dirt cheap with motor issues as a project.

 

[daw123]

That is a beast of an engine. I bet its a PITA to work on with the lack of free space in the engine bay.

 

[halik]

That is a beast of an engine. I bet its a PITA to work on with the lack of free space in the engine bay.

Actually funny you should mention that - it's got a TON more room than the 2.7T A6. I have yet to find a part that I can't see/ can reach or can see and can't reach.

 

[StageLeft]

Looks like a horror but clearly you enjoy this stuff. I work on my cars mainly to save money, not because I particularly enjoy it, so something like this just looks like a curse-fest to me as I lament the lost hours I could be doing whatever else

 

[arcenite]

pushrods FTW

 

[halik]

Looks like a horror but clearly you enjoy this stuff. I work on my cars mainly to save money, not because I particularly enjoy it, so something like this just looks like a curse-fest to me as I lament the lost hours I could be doing whatever else

It's a big-boy sized puzzle. I got it further along today, though the shitty part is undoing the stuff underneath the car. Rear drive shaft, shifter etc.