1.8t differences

[B5_t]

Hey first off i tryed searcing but didnt find anything
heres my situation i reacently just bought my first a4 from an auction , now they claimed that it had had the motor replaced with a newer model not that it matters cause i got a good deal but is there a way to tell a differce between the 150 and 180 hp versions mine has the newer valve cover but thats not really anything thanks in advance for any help

[mwebb]

read the block number? then match it

[B5_t]

read the block number? then match it

ya i figured i could do that just wondering if there was another or easier way to tell that all thx tho !

[spyder101]

look for the engine code on the cylinder head...AEB, AWM, AMU....etc. That will tell what engine it is.

[turbo kraut]

and what yr is the car?

the awm motor is 170hp not 180

[Seerlah]

Look on the head of the block for the stamp on what engine it is.

AEB: 97-99.5
ATW: 2000
AWM: 2001-01.5

[walky_talky20]

Probably the easiest way to tell is the cam chain tensioner on the back of the head (You can check without removing any covers). The AWM engine (170hp) has VVT. On the very back of the head, you'll find the cam chain tensioner. If it has a solenoid with an electrical connector, it is an AWM. If it has no electrical connector it is the 150hp ATW or AEB.

Here is a picture of the tensioner with VVT for the 170hp AWM (notice the black cylinder with the electrical connector):


Here it is installed on the car (in the yellow box, you can see the electrical connector on the very end of the black solenoid):


Here is a close-up (in the yellow box, notice the black cylinder):



Here is a pic of the non-VVT tensioner for the 150hp AEB and ATW:


And here it is installed on the car (notice the lack of the black cylinder):


Both of the AWM and ATW engines are drive-by-wire (no throttle cable). If it has a throttle cable, it is the 150hp AEB. The above picture shows the throttle cable circled in red - making that an AEB engine. There is a bunch of other differences. VVT is one that is particular to the higher (stock) hp AWM.

[CrtchRktRcr]

so mileage, year and how much did you get it for?


I have a beautiful 99 a4 1.8t aeb quattro 5 speed.. 3400 son!

[ghost6303]

Probably the easiest way to tell is the cam chain tensioner on the back of the head (You can check without removing any covers). The AWM engine (170hp) has VVT. On the very back of the head, you'll find the cam chain tensioner. If it has a solenoid with an electrical connector, it is an AWM. If it has no electrical connector it is the 150hp ATW or AEB.

thats all well and good but the head will have the code stamped into it right on the front drivers side corner. all you have to do is look at the 3 letters. you are making it much more complicated then you need to.


BTW there is a difference between early and late model AEB engines, the way to tell is the early (058 block) has an intermediate shaft to drive the oil pump and the later (06A block) doesnt.

[AudiA4_20T]

thats all well and good but the head will have the code stamped into it right on the front drivers side corner. all you have to do is look at the 3 letters. you are making it much more complicated then you need to.


BTW there is a difference between early and late model AEB engines, the way to tell is the early (058 block) has an intermediate shaft to drive the oil pump and the later (06A block) doesnt.

no, they aren't all AEB motors, the only B5 to come with an 06A Block is the AWM ('01). The AEB stopped in 99.5 and was replaced by the 2000 ATW which was the 058 block and small port head

[walky_talky20]

If I'm not mistaken, looking at the code on the head will require removing the beauty cover on the engine. Looking for the VVT solenoid just requires popping the hood.

If no solenoid, the presence of a throttle cable will tell you if its AEB or ATW.

Also, if the engine has been replaced, the head code may not necessarily match up. Could be using a VW head or something.

I agree, its not much work to pull off the cover, but the OP did ask for something even easier. ;)

[99blueb5]

no the marking will be right where there is a "tab" of extra aluminum on the top of hte head bottom right near the coolant hard line, also known as the engine lift point

[Militant-Grunt]

Probably the easiest way to tell is the cam chain tensioner on the back of the head (You can check without removing any covers). The AWM engine (170hp) has VVT. On the very back of the head, you'll find the cam chain tensioner. If it has a solenoid with an electrical connector, it is an AWM. If it has no electrical connector it is the 150hp ATW or AEB.

Here is a picture of the tensioner with VVT for the 170hp AWM (notice the black cylinder with the electrical connector):


Here it is installed on the car (in the yellow box, you can see the electrical connector on the very end of the black solenoid):


Here is a close-up (in the yellow box, notice the black cylinder):



Here is a pic of the non-VVT tensioner for the 150hp AEB and ATW:


And here it is installed on the car (notice the lack of the black cylinder):


Both of the AWM and ATW engines are drive-by-wire (no throttle cable). If it has a throttle cable, it is the 150hp AEB. The above picture shows the throttle cable circled in red - making that an AEB engine. There is a bunch of other differences. VVT is one that is particular to the higher (stock) hp AWM.

That doesnt mean anything, it could also be a bastard motor with an 058 block, Ive seen that before on a customers car. An AWM on a 058.

[B5_t]

thanks guys this makes it much easier to tell.from everything read looks like it may just be the AWM motor :D but will check her when i get home tmr.. Like i said not a big thing just curious is all as i wont be modding for a few months due to school debt and i don't know why i put 180 ive done enough research to know that . Anyways learning a lot and hope to have my own build thread up here soon enough

[B5_t]

so mileage, year and how much did you get it for?


I have a beautiful 99 a4 1.8t aeb quattro 5 speed.. 3400 son!

Mines a 1.8t 5speed just like yours quattro also .. 3000 cdn

[mike-2ptzero]

look for the engine code on the cylinder head...AEB, AWM, AMU....etc. That will tell what engine it is.

Actually thats the code for the head not the engine. Best way to tell what block is in the car is to read the code on the block itself. All of the heads fit on all of the blocks so if the shop only replaced the short block with a newer short block it could still have the old head on it.


He might be able to tell what block it has by looking for the water pump. IIRC they are different on the 058 block vs the 06a block.

If no solenoid, the presence of a throttle cable will tell you if its AEB or ATW.

AEB has a throttle cable, the ATW is dbw.

[CrtchRktRcr]

Mines a 1.8t 5speed just like yours quattro also .. 3000 cdn

hell yes.. screamin deal.. Mine has 150k which sucks.. but runs perfect and is silver with silver leather.. clutch is solid, 6disc changer, everythings solid.. i'm a happy camper. oh and it's sport edition.. here's a tip. if you're gonna drop it.. do NOT get sport springs! get the race.. i got a set not thinking.. didn't do shit. If your's isn't the sport model I will sell you my h&r's for super cheap. pm me if you want them.

[B5_t]

hell yes.. screamin deal.. Mine has 150k which sucks.. but runs perfect and is silver with silver leather.. clutch is solid, 6disc changer, everythings solid.. i'm a happy camper. oh and it's sport edition.. here's a tip. if you're gonna drop it.. do NOT get sport springs! get the race.. i got a set not thinking.. didn't do shit. If your's isn't the sport model I will sell you my h&r's for super cheap. pm me if you want them.

thanks man sounds like u got a good one yourself i mean once i add taxes and shit its over the 3500 you got yours for but oh ya was just doin some cleaning of the wheels and noticed also has a full borla exaust too hehe . So that made my day and ya i love the car too no leather for me but has got special edition cltoh seats in it. thanks for the tip am have read that same thing before , going to drop it eventually just have to decide which type and how low i want to if i decide to due to the fun winters up here and it being my DD

[Squarrl]

you post on custom?

[B5_t]

you post on custom?

ya just signed up there not to long ago just kinda browsed the site before this and am just learning everything i can bout the 1.8t's and the new audi but gotta say i love everything bout it so far :) .. i take it your a custom mamber yourself ?

[Squarrl]

Yah same user name.... car is in the classified there going on the cruse?

[offroader1006]

he could still have the k03s on either head block combo.

boost gauge will tell you which you have.

[Poopie]

the awm will not drop right into a car that came with an aeb. Water pump, accessories, and plumbling are all slightly different. its doable, but why bother? you won't gain 20 hp with out the awm ecu.

[mike-2ptzero]

the awm will not drop right into a car that came with an aeb. Water pump, accessories, and plumbling are all slightly different. its doable, but why bother? you won't gain 20 hp with out the awm ecu.

Sure he will, he just needs a chip.

[B5_t]

Yah same user name.... car is in the classified there going on the cruse?

ah gotcha very nice good luck with the sale...what are you looking to replace it with .. and cruse? ill have to look into that one

[B5_t]

Sure he will, he just needs a chip.

Dont worry guys i was wrong anyways still have AEB that they replaced guess i was just hoping fr that little extra

[mike-2ptzero]

Dont worry guys i was wrong anyways still have AEB that they replaced guess i was just hoping fr that little extra

Extra what? The 058 and 06A blocks make the same power. The 2001+ cars just made more power because the stock tuning ran more boost (.8 bar vs .6 bar). Once they were chipped at the same boost they made the same power. So the 150 hp vs 170 hp had nothing to do with the actual block.

[B5_t]

Extra what? The 058 and 06A blocks make the same power. The 2001+ cars just made more power because the stock tuning ran more boost (.8 bar vs .6 bar). Once they were chipped at the same boost they made the same power. So the 150 hp vs 170 hp had nothing to do with the actual block.

Wow well dont i feel like an idiot lol .. guess i shoulda read more into that one i thought they changed something to do with the engine itself

[JPJ2007]

I have a 98.5 A4 1.8T sport package and my engine says ATW right on the head where
the extra tab is...

Does this mean mine is swapped????

[mike-2ptzero]

I have a 98.5 A4 1.8T sport package and my engine says ATW right on the head where
the extra tab is...

Does this mean mine is swapped????

That tab is just for the head which could have been swapped. To check the block you need to check the passenger side of the block near cylinder #2 to see which block you have in the car. The person you got the car from could have had the timing belt snap and just threw in any used head they could find and did not there was a diffference.

[onemoremile]

Wow well dont i feel like an idiot lol .. guess i shoulda read more into that one i thought they changed something to do with the engine itself

They did, smaller ports and weaker rods. The AEB is the best of the stock 1.8t engines.