BWE vs BUL

[antwan64og]

can anyone confirm that BWE blocks are exactly the same as BUL block except BUL have revision B camshafts? My research says so.

I’m discussing with an engine builder about a reconditioned engine and they say its not obvious but there are subtle differences between some TFSI blocks with oil fittings and they don’t want to send an original BWE block and have issues.

Can anyone confirm they are the same or if there are minor adjustments needed to lines and ancillaries swapping between blocks?

 

[Charlie Farley]

without looking at the parts database i'd pass on confirming they are , what I do know from when I had my new short motor fitted by audi is that they are not the same, they were quite clear that the engines blocks were different .
Many parts are the same and used across all the petrol engine codes but many parts are specific to the BUL , anyway as I don't have specific details on my desk this minute I cant say 100% yes or no but i'm going to have a look into it anyway .

 

[Charlie Farley]

A quick snoop on audi parts database shows three part numbers specific to BUL , but not shared with BWE, but BWE engine codes are shared with other others , so kinda indicates BUL's are specific .

 

[Charlie Farley]

https://audi.7zap.com/en/rdw/audi+a4+s4+avant+quattro/a4q/2006-454/1/100-100005/

But its doesn't show as a bare block , only base engine so more indepth investigation is required to cross ref BUL blocks with others .
So still on the fence at this point.

 

[Charlie Farley]

To make things just tad more complicated it looks like the bare block is not available as a spare replacement part, the base engine is the min you can get unless you went for a 3rd party refurbed item.

 

[antwan64og]

Yeah it will be refurbed, £700 for a used core is enough, new is more than I can stomach.

If it’s just bending a few oil lines and coolant lines thats fine, just worried there might be more

 

[Charlie Farley]

Just had a chat with a guy online, he says they are different and best to get another BUL block .

also saw this.
does also group BWE in with other codes , but BUL is a stand alone unit.

Modifications
BPJ - 170hp (125 kW)/4,300 rpm; 207 ft lb (280Nm)/1,800-4,200 rpm. Application: Audi A6 (C6), VW Tiguan. That is the weakest version of 2.0 TFSI engine for Audi A6 and VW Tiguan. It has single turbocharger.
BWA - 185hp (136 kW)/6,000 rpm; 199 ft lb (270Nm)/1,800-5,000 rpm. Application: SEAT Leon.
AXX, BWA, BWE, BPY - 200hp (147 kW)/5,100-6,000 rpm; 207 ft lb (280Nm)/1,700-5,000 rpm. That engine version is for North American market also. Application: Audi A4 B7, Audi A3 8P, Audi TT, VW Passat B6, VW Golf Mk5 GTI, VW Jetta Mk5 GLI, SEAT Leon FR Mk2, SEAT Altea, SEAT Toledo Mk3, SEAT Exeo, Skoda Octavia vRS.
BUL - 220hp (162 kW)/5,900 rpm; 221 ft lb (300Nm)/2,200-4,800 rpm. This is engine for the 2005 Audi A4 in DTM Edition trim.
CDL - 220-265hp (162-195 kW)/4,500-6,300 rpm; 221-258 ft lb (300-350Nm)/2,500-4,400 rpm. That engine has different output in different applications: Volkswagen Polo R WRC, Volkswagen Golf MKVI GTI Edition 35, Audi S3 (8P), Golf R for Australia, Japan, Middle-East and North America, Scirocco R. The engine is the same BYD, but max boost pressure is higher - 1.2 bar.
BYD - 230hp (169 kW)/5,500; 221 ft lb (300Nm)/2,250-5,200 rpm. Application: VW Golf Mk5 GTI Edition 30, Pirelli Edition. This engine has reinforced cylinder block, conrods, turbocharger KKK K04 (max pressure is 0.9 bar).
BWJ - 241hp (177 kW)/6,000; 221 ft lb (300Nm)/2,200-5,500 rpm. SEAT Leon Cupra engines.
BHZ - 265hp (195 kW)/6,000; 258 ft lb (350Nm)/2,500-5,000 rpm. Audi S3 (8P) engine.
CDLA - 265hp (195 kW)/6,000; 258 ft lb (350Nm)/2,500-5,000 rpm. Application: Audi S3 (8P), Audi TTS, SEAT Leon Cupra R, VW Scirocco R.
CDLF - 271hp (199 kW)/6,000; 258 ft lb (350Nm)/2,500-5,000 rpm. That is a Golf R engine for European market.
CDLF - 272hp (200 kW)/6,000; 258 ft lb (350Nm)/2,500-5,000 rpm. That another high-performance engine is for European Audi TTS.

with the lack of any real confirmed differences i'd be holding back a bit until I had something in writing etc that confirmed they are identical blocks etc.

just my input chap and maybe completely wrong.

 

[antwan64og]

No, I agree I’m totally waiting for confirmation, A few people have said use a BWA block but I don’t know if they did the install themselves or if anything else was involved.

The rebuilder is asking me to send my block with a hole in it to compare to the BWE incase there are small differences but I don’t want to leave my A4 on the ramp for a week if I can avoid it.

 

[Charlie Farley]

Good luck with it chap, let us know how you get on.