A2 1.4TDI BHC 75hp 2005 - consider to buy - what shall I look for ?

The BHC engine...
  • always has the 42-litre fuel tank.
  • always has the MK60 ABS control unit, meaning that choosing and fitting an alternative gearbox is much easier. As Spike says, you don't have to worry about fitting a speedo drive into the gearbox because the instrument cluster gets its speed from the ABS unit. Unfortunately, the MK60 ABS unit is less reliable than the earlier MK20 unit.
  • has the N75 valve (turbo output control) and N18 valve (EGR control) integrated into a single black box (this is mounted above the front-right wheel arch on UK A2s). These seem very reliable, but it's annoying that you can't access/replace the valves independently.
  • has an electronic anti-shudder valve. This is probably the single biggest pain in the bum on the ATL and BHC engines. It is nowhere near as reliable as the vacuum version found on the AMF engine and is responsible for 99% of symptom-free engine management light issues on TDIs.
  • has a vacuum-operated EGR valve just like the AMF engine. However, the BHC engine management unit is a little more intelligent than the AMF version, meaning it can detect if you physically disable the EGR valve. This is no problem - the BHC remap that Depronman and I developed removes EGR functionality from the software. Problem solved. My sister, and many other club members, drive BHC A2s with the EGR disabled.
  • has water-cooled EGR. The coolant system at the back of the BHC engine is designed such that it cools the portion of exhaust gas that's directed to the EGR valve. This is what makes its emissions EU4 compliant rather than just EU3 compliant.
  • uses a nicer design of wastegate turbo than the AMF engine. This is covered in Section 4 of the TDI120 thread.
  • uses exactly the same core engine as the AMF engine. The cylinder block, pistons, cylinder head, sump, etc are all identical.
Dashboards are the same from the first to the last A2 ever made.

Hope this help.

Cheers,

Tom
 
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Many thanks for your brilliant write up and for all the good advises given, timmus :)

Also for guiding me into the: TDI120: My New Engine , which is the most interesting thread I have ever read on any Forum....

These are big words Tom... but used after hours of consideration and double checking with google translate...

Many, many thanks !! (and yes, I have an additional AMF in the engine stand and your TDI120 Project will be a huge source of inspiration and "how to" for my project too :) )

Cheers
dieselfan
 
dieselfan said:
Many thanks for your brilliant write up and for all the good advises given, timmus :)

Also for guiding me into the: TDI120: My New Engine , which is the most interesting thread I have ever read on any Forum....

These are big words Tom... but used after hours of consideration and double checking with google translate...

Many, many thanks !! (and yes, I have an additional AMF in the engine stand and your TDI120 Project will be a huge source of inspiration and "how to" for my project too :) )

Cheers
dieselfan
Click to expand...

You are very welcome. Those are big words indeed - thank you very much. The TDI120 thread will definitely give you a good overview of how the 1.4TDI works. I hope it proves to be useful for you. :)

Kind regards,

Tom
 
To sum up, there are so few disadvantages with the 2005 BHC so it was an easy decision... I bought it :)
My youngest have helped out and the new "baby" is now ready to be taken to use. All fluids and filters changed and no DTCs... Misses turn 50 tomorrow and will see it for the first time then. She will be very happy for the heated seats and the additional electrical cabin heater which are really effective.

timmus have made us aware that we need to reed up on the anti shutter valve and N75/N18. These are new to me/us so it is always good to be guided and be able to be prepared... :)

I hope the 2005 BHC will reduce pressure on the A2 "situation" at home (one A2 roadside in the wildness with servo issue, and the A2 1.2TDI 3L with gear change controller issue and 5x100 front spindel swap issue... I thought it should be so easy...)

Thanks to all of you for the brilliant help :)

Cheers
dieselfan
 
So much good technical stuff here. Feel a bit noddy mentioning the following but having owned a 2003 TDi form new I would be very interested in:
Front suspension arms (mentioned already)
Hand brake cable corrosion around the connectors. If cables are needed empty that big tank before starting the job; you may need to lower it.
Oil pump chain, if it hasn’t been done I would replace it ASAP.
Gear selector, if it’s sloppy again I would fix it.
All appear to be quite common faults at 100k miles plus.
 
timmus said:
The BHC engine...
  • always has the MK60 ABS control unit, meaning that choosing and fitting an alternative gearbox is much easier. As Spike says, you don't have to worry about fitting a speedo drive into the gearbox because the instrument cluster gets its speed from the ABS unit. Unfortunately, the MK60 ABS unit is less reliable than the earlier MK20 unit.
Hope this help.

Cheers,

Tom
Click to expand...

MYP gearboxes are very expensive and difficult to find over here - I have been offered a KFK gearbox from Polo 1.6TDI 2009-2014 for reasonable money. Kan the 6 speed KFK be used ? What are the + and - ? Anyone know the gear ratio for the KFK ?
 
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