A4 (B5 Platform) Discussion Discussion forum for the B5 Audi A4 produced from 1995-2001 B5 FAQ

1.8t block interchangability?

Thread Tools
 
Search this Thread
 
Old 03-04-2011, 05:56 AM
  #1  
AudiWorld Senior Member
Thread Starter
 
jschick's Avatar
 
Join Date: Sep 2003
Location: N.E. Ohio
Posts: 1,139
Likes: 0
Received 0 Likes on 0 Posts
Default 1.8t block interchangability?

I have a friend who has a 2001 1.8t. can anyone confirm which years blocks are interchangeable? I thought pretty much all the lower ends were the same and the heads were different?

I have found several engines with broken T-belts for under $200, and since he has a good head it would be a pretty cheap swap since you would change the T-belt, water pump etc anyway. these engines are a 99 and 00
Old 03-04-2011, 06:47 AM
  #2  
AudiWorld Member
 
Peter Badore's Avatar
 
Join Date: Nov 2005
Posts: 501
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by jschick
I have a friend who has a 2001 1.8t. can anyone confirm which years blocks are interchangeable? I thought pretty much all the lower ends were the same and the heads were different?

I have found several engines with broken T-belts for under $200, and since he has a good head it would be a pretty cheap swap since you would change the T-belt, water pump etc anyway. these engines are a 99 and 00
There are two very different cylinder blocks for the 1.8l turbo A4 in the US.
The early engines had an external water pump; the later engines have an internal
water pump driven by the camshaft belt. Early engines are coded as AEB and ATW;
later engines are coded AWM. All 2001 cars that I have seen are AWM and I have seen some 2000 cars that were either AWM or ATW.
Old 03-04-2011, 06:55 AM
  #3  
AudiWorld Senior Member
Thread Starter
 
jschick's Avatar
 
Join Date: Sep 2003
Location: N.E. Ohio
Posts: 1,139
Likes: 0
Received 0 Likes on 0 Posts
Default

is the pump the only difference? can a AWM head go on a ATW block, using the AWM wire harness etc....
Old 03-04-2011, 04:02 PM
  #4  
AudiWorld Member
 
Peter Badore's Avatar
 
Join Date: Nov 2005
Posts: 501
Likes: 0
Received 2 Likes on 2 Posts
Default

Originally Posted by jschick
is the pump the only difference? can a AWM head go on a ATW block, using the AWM wire harness etc....
I have to check but I think that AWM is throttle drive by wire whereas AEB and ATW are drive by cable which makes for lots of differences. I have not tried that swap but have done A4 and A6 2.8l V6 swaps with surprises (not good ones).
Old 03-04-2011, 06:01 PM
  #5  
AudiWorld Senior Member
Thread Starter
 
jschick's Avatar
 
Join Date: Sep 2003
Location: N.E. Ohio
Posts: 1,139
Likes: 0
Received 0 Likes on 0 Posts
Default

I don't remember but I think it is drive by wire as well? but I want to use this head and all the intake, turbo etc,and just swap to another block. this engine has a knock but everything else is good. also this car is a Auto, will a manual fit? can I just swap flywheels or do I need a Auto?
Old 03-04-2011, 09:20 PM
  #6  
AudiWorld Member
 
600whpA4's Avatar
 
Join Date: Apr 2009
Posts: 578
Likes: 0
Received 0 Likes on 0 Posts
Default

Everything from 2000 up is DBW, this includes the ATW, AWM and AMB.

The AEB/ATW are a 058 block and the AWM/AMB are a 06A block.

The 20v head found on all of them can be swapped to the other. Difference is the AEB is a large port with no SAI flange, the rest are all small port heads with the SAI flange. The AWM/AMB heads from the 06A block have the VVT cam chain tensioner.

You could swap in a 058 block but you would have to include all of the accesories that came with it. Might have to swap the knock sensors.
Old 03-05-2011, 04:13 AM
  #7  
AudiWorld Senior Member
Thread Starter
 
jschick's Avatar
 
Join Date: Sep 2003
Location: N.E. Ohio
Posts: 1,139
Likes: 0
Received 0 Likes on 0 Posts
Default

thanks, this is what I thought, that the heads are swapable between blocks.
but it sounds like what you are saying is the alternator and A/C pump will not fit from the 01 AWM car to a 99 or 2000 block.
and It also sounds like I can't swap in a complete 2000 engine because the sensors won't work and it doesn't have vvt, but can I swap in the VVT tensioner from his 01 into a 2000 engine?

Basically where I am at is I can't find a AMW engine around here for less then $1600 and right now she can't affort to put over $2000 in the car since you still need to replace the T-belt and etc with the swap.....
I have found several 2000 engines for under $250 with broken T-belts, so with pretty much a complete rebuild will be around $1000, but to do this I need to know what to expect! if it were my car I would just jump in and go for it!
Old 03-05-2011, 08:27 AM
  #8  
AudiWorld Member
 
600whpA4's Avatar
 
Join Date: Apr 2009
Posts: 578
Likes: 0
Received 0 Likes on 0 Posts
Default

You can swap the VVT tensioner into the ATW head or just swap your AWM head onto the ATW block.
Old 03-05-2011, 05:54 PM
  #9  
Audiworld Junior Member
 
Edwardo's Avatar
 
Join Date: Dec 2007
Posts: 73
Likes: 0
Received 0 Likes on 0 Posts
Default

Just a heads up: a broken timing belt will mean that the valves made contact with the pistons. You wouldn't want to just take the head off, swap the head and then run it.
Old 07-09-2017, 01:54 PM
  #10  
AudiWorld Newcomer
 
Gus Ward's Avatar
 
Join Date: Jul 2017
Posts: 1
Likes: 0
Received 0 Likes on 0 Posts
Default Block/ head interchangeability

Some blocks and heads are designed for different hydraulic tensioners and idlers


Quick Reply: 1.8t block interchangability?



All times are GMT -8. The time now is 07:23 PM.