I just bought a 1998 A4 1.8T quattro with 123,000 miles on. It also has a stage 2 chip plus intake, exhaust upgrades.
Even before buying, I was concerned about the longevity of the turbo motor.

What is the forums experience?

What is the standard boost on the engine (and compression ratio)?

Volker

__________________
1998 Audi A4 1.8T Quattro, dark blue
- Carbonio Cold Air Intake
- APR Inlet Tubes for Turbo and Intake
- TAP 50 HP Chip
- Milltek Cat Back Exhaust
- 17 in OZ Goodyear F1 225/45-17
- Power Slot Rotors
- Hawk Pads

Sounds good, all the 75k-90k repairwork has probably already been done. What chip, intake, and exhaust does it have? Lets see some pics!

__________________
DEPO Headlights - 8000k HIDs - 3000k Hi-beams
Forge 007 DV - Custom "U-Pipe" intake - Custom 3" exhaust
Smoked markers - Kamei grille - Painted lowers
S4 front bumper - S4 brakes - S4 wheels - S4 tails ...all done on EBAY

the 1.8t, when taken care of will last 200K+ easy. 123,000 miles isn't a big deal with these cars, people have BAT on orginal engines with more miles than you.
I have 105,000 on mine myself and it will soon see a BT. Just make sure you keep your OCI at 3-5K and use only synthetic oil. the most important maintiance with this engine is the timming belt which is usually a 60-70K maintiance.

Yes. Timing belt, rear seal, wheel bearings, clutch, flywheel, something on the turbo, etc. are done. I have yet to go through all receipts the owner provided ($7k!) and make a list. Will post (including pics if I figure out how it works).

Volker

__________________
1998 Audi A4 1.8T Quattro, dark blue
- Carbonio Cold Air Intake
- APR Inlet Tubes for Turbo and Intake
- TAP 50 HP Chip
- Milltek Cat Back Exhaust
- 17 in OZ Goodyear F1 225/45-17
- Power Slot Rotors
- Hawk Pads

These seem to run forever. I talked to my mechanic and he just did a fifth timing belt job on one (350k!!). It's all about maintaining your baby. Mine was driven by an older lady before me and she was pretty easy on it and it runs pretty well for 140k. Enjoy the new ride.

__________________
-Next to stock b5 a4 avant 1.8tqm
-Denso plugs, Hitachi Coils, K&N air
-Blacked Grill, Clear Corners, Ind. Fogs
-Big dreams
-Miniature bank account

What determines when the next time belt change is needed?
Mileage?
Certain signs to observe and be vigilant about?

Volker

__________________
1998 Audi A4 1.8T Quattro, dark blue
- Carbonio Cold Air Intake
- APR Inlet Tubes for Turbo and Intake
- TAP 50 HP Chip
- Milltek Cat Back Exhaust
- 17 in OZ Goodyear F1 225/45-17
- Power Slot Rotors
- Hawk Pads

60-70,000 mile intervals are reccomended. there's no indicator that can tell you when to change your timming belt. this is why it's important on an interferance engine like the 1.8T

Tell me about it: on the 1994 Audi 100 V6 2.8 (my father still drives it in Germany), the belt "jumped" and caused an engine repaid of $2,000 plus (bent valves, etc.)!

I will get the exact mileage when the timing belt was last changed from the previous owner.

Regarding the tubo itself: what are the reported miles the turbo last before it is a goner?

Volker


Volker

__________________
1998 Audi A4 1.8T Quattro, dark blue
- Carbonio Cold Air Intake
- APR Inlet Tubes for Turbo and Intake
- TAP 50 HP Chip
- Milltek Cat Back Exhaust
- 17 in OZ Goodyear F1 225/45-17
- Power Slot Rotors
- Hawk Pads

the turbo can last the lifetime of the engine, it's all dependent on how well it was taken care of in regards to letting it warmup and cooled down, failure to do so can lead to sludge and varnish which *will* destroy it prematurely. This becomes even more important with a chip and BT.

What is a BAT?

I assume OCI is Oil Change Interval?

Volker

__________________
1998 Audi A4 1.8T Quattro, dark blue
- Carbonio Cold Air Intake
- APR Inlet Tubes for Turbo and Intake
- TAP 50 HP Chip
- Milltek Cat Back Exhaust
- 17 in OZ Goodyear F1 225/45-17
- Power Slot Rotors
- Hawk Pads