Good news for 2.7 block. ( crack related )

[Reich]

Like some of you have probably noticed, There were some of blocks cracking. Not a whole lot but maybe 3-4 high Hp blocks.

The symptom you would get is a low oil pressure because the Bearing looses it's geometry, thus loosing it's pressue from an oval bore.

I had the same low oil pressure symptom once the oil got warmed after a couple of runs. So I was like ohh f**K my block is probably cracked too.
So I decide to attach the engine and have a good look farther deep under. Guess what. My block is not cracked at all.
Guess what was causing my low pressure?
I've found this.

The 'o' ring is done. It's from the pipe that comes from pump to the block, at the block.

Cylinder wall looks very good too. Bearings looks like bran new as well.

Long story short. YOU NEED A DECK PLATE UNDER THOSE BLOCKS!!!!!!
We have a couple of good machinist at Cummins Shop. They know there stuff good. They have to deal with v12, v16, v18 diesel blocks that worth between 150000- 300000$ the block alone. So trust me they save almost every thing. Here's a good explaination they told me.
On an inline 6 engine, there's one major force you have to deal with. It's downward force. On a v6 instead, You have at least 3 forces you got to contain; Downward,, and sidewards on each side. Especially when we boost the crap out of them. Remember. Those Audi V6 is not narow at all. So side loads are more exagerated. You just need to think when for example, piston 2 is pushing hard while the opposed cylinder on same crank rod is only exhausting and all that. My deck plate didn't have upward load at all, but at least it prevented the caps from moving sideways.
What I'll do is put put a little bit of load on the deck plate. Maybe .002'' - .003'' to help forcing things upward, but at least i'm protected from side vibrations.
I'll put some more pictures of the progress when I get some time.

[Schoolbus4]

Nice found

[Tec_Nine]

interesting, good info tho thanks

[GURUMAN]

You guys have to keep in mind that Simon Runs my old Block.

before beeing pushed by tials 770 it had my original gt28rs kit

was run on 034 IIC before EPL tuned


This engine has a least 50 10 sec runs and was revved very close to the 8k mark


Good !

[Reich]

You guys have to keep in mind that Simon Runs my old Block.

before beeing pushed by tials 770 it had my original gt28rs kit

was run on 034 IIC before EPL tuned


This engine has a least 50 10 sec runs and was revved very close to the 8k mark


Good !

Yeap. You beat the pis out of it and so did I..

We both beat the hell out of this block. Three or four turbo failures including you. I just don't count them.

[Meow]

revved very close to the 8k mark

Glad the block has taken a beating and still lasts! Rev out more though!!!! :) 8.5-9k or bust!

[S4 00 2.7]

Good info.

[Matt Danger]

wait, what would a deck plate have to do with the oil pump hard line? Was there some flex or movement that caused that o-ring to wear down?

[julex]

wait, what would a deck plate have to do with the oil pump hard line? Was there some flex or movement that caused that o-ring to wear down?

I don't get it too... That o-ring is definitely basking in oil so twisting movement should not phase it... in-out due to it being not fastened properly, maybe, but maybe there is a problem with oil pump not being chamfered properly or something like that... or shitty o-ring that swelled from oil/fuel... This is definitely a first though.

[Militant-Grunt]

Hmmm, that may have been the cause of my motor running extremely hot oil temperatures. I replaced damn near everything back in the day, and that motor would consistently run 250F regular oil operating temperatures. Would basically overheat if the fans were not running on full blast.

Do you have any photos of the opening inside the block? Any damage there?

[Reich]

wait, what would a deck plate have to do with the oil pump hard line? Was there some flex or movement that caused that o-ring to wear down?

There's an adaptor that is about the thickness of the plate it self at the block. Dont know where it comes from nor who made it. I'll take a snap of it.

[Reich]

Hmmm, that may have been the cause of my motor running extremely hot oil temperatures. I replaced damn near everything back in the day, and that motor would consistently run 250F regular oil operating temperatures. Would basically overheat if the fans were not running on full blast.

Do you have any photos of the opening inside the block? Any damage there?

I'll take a couple of snaps of that too.

[Reich]

You can see, the pump was trimed here.

And here.

Now I don't know if they resurfaced the whole thing. You guys will tell by camparing with a new one with pics please.

[Reich]

Now for Julex.
The adaptor I was refering to is this one. IT's exactly the size of plate thickness.

[Reich]

What surprised me the most is that the only thing that was used to shim the bearing caps to the plate was those sleeves. And it hold good!

[Reich]

You can see the sleeves that marked the plate. Do you know what that translate to? That means that it moves a lot down there.
No point to build an Audi 2.7tt without Putting a plate. You got the proof right there.

[Reich]

I'll bring the plate to the shop and make sure that it's not cracked, make sure it's still straight and clean the marks.
After that I'll put some .002'' - .003'' load into it.

[Reich]

We discussed about turbos, tuners, Cylinder heads.... But we must never bypass the most important thing anymore. The Block.....

Hope this help a little bit.

[julex]

That adapter looks very rough, no wonder it chewed the oring.

As to the market. Sure, sleeves are probably steel and plate is aluminum. The plate is force bolted down on top of sleeves. Even vibrations would cause these marked imho. Anyway, you need to do something about that adapter.

[Reich]

That adapter looks very rough, no wonder it chewed the oring.

As to the market. Sure, sleeves are probably steel and plate is aluminum. The plate is force bolted down on top of sleeves. Even vibrations would cause these marked imho. Anyway, you need to do something about that adapter.

I'll tell you that. That plate is made of solid metal. Useless to use aluminum plate under that it would hold nothing. Like I said. Even though it was made of solid metal, it marked relatively deep into it. I'm impressed.

[Reich]

That adapter looks very rough, no wonder it chewed the oring.

As to the market. Sure, sleeves are probably steel and plate is aluminum. The plate is force bolted down on top of sleeves. Even vibrations would cause these marked imho. Anyway, you need to do something about that adapter.

And yes. I'll have a look into that adaptor to make sure it doesn't happen anymore.

[Meow]

I'll tell you that. That plate is made of solid metal. Useless to use aluminum plate under that it would hold nothing. Like I said. Even though it was made of solid metal, it marked relatively deep into it. I'm impressed.

Aluminum is a "solid metal" and gouges pretty easily when things vibrates on it. Please find out what it's actually made of. I'm curious.

[Reich]

Aluminum is a "solid metal" and gouges pretty easily when things vibrates on it. Please find out what it's actually made of. I'm curious.

Like I said it's made of metal. IT's Very heavy magnets hold on her easy. Forget aluminium as solid metal period....lol

[kramrs2]

Is this Eurospec girdle?

[Reich]

Is this Eurospec girdle?

Obviously no. Eurospec has plat bearing caps that entends up to the there plate.

[kramrs2]

I am sorry, but I did not get it. What is the difference?

[Timtheguru]

Solid metal? It's obviously not aluminum since aluminum is not magnetic. Some kind of steel or iron plate is my guess, but what grade? Does it have any stamp on it? What is the part number of this thing if any?

[1gcrazy]

Reich... it's called STEEL. It's solid STEEL. Steel and aluminum ARE BOTH METALS.

I dont really get this either. If you had the plate and still had a failure... whats your point?

[airjawed]

Reich... it's called STEEL. It's solid STEEL. Steel and aluminum ARE BOTH METALS.

I dont really get this either. If you had the plate and still had a failure... whats your point?

Block did not crack.

I think what is being said is that the design of the plate is such that the oil feed line moves around and that caused wear on the 'o' ring.

[Monty23]

Block did not crack.

I think what is being said is that the design of the plate is such that the oil feed line moves around and that caused wear on the 'o' ring.

The inner surface finish of the "adapter" is what seems to have butchered the o ring...

[martin0079]

GURU or Reich do you happen to remember if this block is out of a 2001 and earlier or out of a 2001.5 and later car?

[GURUMAN]

Obviously no. Eurospec has plat bearing caps that entends up to the there plate.

It is actually an eurospec...
I hope, it was ordered thru Issam in 08

[GURUMAN]

GURU or Reich do you happen to remember if this block is out of a 2001 and earlier or out of a 2001.5 and later car?

No, it actually was a spare block I had...

[julex]

The inner surface finish of the "adapter" is what seems to have butchered the o ring...

Exactly... it looks like somebody hack sawed off a piece of metal and didn't bother to deburr or else was hammering this poor part in without a proper wood buffer... There is zero mystery why the oring got chewed.

So, not knocking on you or anything but you traded one remote chance of failure for another guaranteed failure mandating taking shit apart...

[Monty23]

Exactly... it looks like somebody hack sawed off a piece of metal and didn't bother to deburr or else was hammering this poor part in without a proper wood buffer... There is zero mystery why the oring got chewed.

So, not knocking on you or anything but you traded one remote chance of failure for another guaranteed failure mandating taking shit apart...

It would be nice to see a picture without the plug...

[britishturbo]

I have the same girdle going on my 3.0 build. Good stuff.

[Ribbie]

It would be nice to see a picture without the plug...

I agree, the surface that the oring sits on is further into the bore (under the plug)

[martin0079]

No, it actually was a spare block I had...

It needed to come out of a car at some point so it would be safe to assume that the blocks year is unknown which is too bad.

[zillarob]

I bet if the adapter was chamfered, the oring wouldnt look like that.
Looks to me like it was sheared on the way in.

[s4andtls]

I have the same girdle going on my 3.0 build. Good stuff.

Will you be able to bolt up all the tranny bolts with a girdle? specifically Eurospec, remember reading that one wouldn't with their 3.0