Author Topic: 1989 Coupe Quattro B3 - Project car  (Read 2338 times)

0 Members and 1 Guest are viewing this topic.

Offline Audi do

  • *
  • *
  • Posts: 106
Re: 1989 Coupe Quattro B3 - Project car
« Reply #20 on: July 07, 2019, 10:09:22 pm »
Sounds like a classic stealership response haha
To be fair they replaced all ten hydraulic lifters (over a $1000 so they said), they said seven were faulty so replaced the lot..

Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #21 on: September 10, 2019, 12:32:09 pm »
Ok, question time,

I need to rewire a plug on the back of my head that goes to the thermal timing switch. Plug was previously broken and the wires were just tucked up away out of sight until I found them when I was looking at other broken parts I need to replace ::).

The wires I have are green with white stripe and red with black stripe. Which way do they go? Does it matter? Can anyone confirm?


Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #22 on: September 15, 2019, 10:42:14 am »
Nevermind, I found it on the bosch classic parts website. Wired that back in today with a new plug.


Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #23 on: November 04, 2019, 03:50:10 pm »
Here we go again.

A couple of weeks ago I sent my gauges off to be repaired as Im sure most of you know. They stop counting km's eventually. My one hasn't been running for approximately 7 years so you know, only a few missed kms haha! It hadn't been opened ever and still had the factory seal stickers over the boards.





While that was out and the steering wheel was off I noticed that the horn ring housing thing was busted up and poorly glued back together. Rather than buy one I decided to 3d model it and then 3d print it.



It fit and worked first go. Woo!



Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #24 on: November 04, 2019, 03:55:02 pm »
This was all in preparation for this weeks job. A head rebuild :) A few months back I did a compression test on my engine and 4 out of 5 were spot on ~180psi. On Saturday I took the car to the workshop and pulled the front end, radioator and intake off.



Replacing all the sensors attached to the head so had to remove the sensor housing. It went really well... I only broke 2 of the bolts holding it on. There were 2 holding it on. :D



Thermostat housing actually came off rather easily. Although the thermostat was missing. Always did wonder why it took FOREVER to heat up.



Rocker cover off, camshaft looks all good



Not too much wear





Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #25 on: November 04, 2019, 04:06:37 pm »
Now the fun/scary bit. What will the cylinders look like? What will the pistons look like? Not too shabby!



Although upon further inspection I did find out why they took the thermostat out... Can you spot it?



A little closer?



The majority of the coolant gallerys were full of this crap!



I think it must be some kind of coolant leak fixing crap you put in your radiators to plug holes... Well it plugged holes alright... I'm guessing when I last had the radiator out to get the holes fixed properly and flushed that it loosened up some sludge with this garbage in it and its started plugging everything up. So radiators are off the to be flushed again and when I put it all back together I'm going to flush the engine out too.

Head looks pretty good. I think one of the valves is leaking which is where my problem is so while I have gone this far i may as well get it rebuilt so the head got dropped off the a re builders today with valves, lifters, springs and everything in between.



To round the day off I cleaned up the block face and the coolant galleries. Only one piston had "excessive" carbon build up which was around the size of a 20c piece and it just lifted off with my finger nail. The rest I'm probably just going to leave as is. Bores have no scoring of wear marks. Can still see the hone marks. I'll try take some photos of them when I go back in on Thursday to hopefully put it all back together.


Offline slowburn

  • #
  • *
  • Posts: 1804
  • how many is too many?
Re: 1989 Coupe Quattro B3 - Project car
« Reply #26 on: November 04, 2019, 11:13:35 pm »
epic, nice post man, thanks for sharing >:D
99 B5 S4 Avant
85 coupe quattro
72 fiat 124 coupe
97 corolla wagon

Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #27 on: November 15, 2019, 03:05:04 pm »
On Thursday last week the head was finished up and I a couple of days off work to finish this up and slap it all back together. My dad cleaned up the top of the pistons between jobs so that was a bonus haha



One freshly cleaned and rebuilt head





The reason for the loss of compression in cylinder 5 was a leaky exhaust valve that wasn't fully seating.
As seen by the lack of a shiny ring.



Compared to the intake valve of the same cylinder.



The valve guides we loose as a goose and I'm sure the seals were toast too. I didn't actually look. The head itself had a lovely warp on so that was machined flat again. I can't remember how much had to be removed though.

Here's the head back on and torqued down ready to rumble. After putting everything back together and flushing the engine of coolant and any other garbage we fired it up.



Things did not go well. :(

cylinder 5 was not firing so we checked plugs, leads, connections everything we could think of. Popped the rocker cover off and sure enough the exhaust valve lifter was solid in any position. The head re builder didn't think to check the valve stem length after the seats were re cut and it was too long. We loosened off the cam caps and the lifter became free. Basically at this point I'd given up. We pushed it back into the workshop over the pit and there it sat for the weekend.

Monday rolled around and the head re building company told us to pull it back down and they'll fix it up properly. I'm sure the guy who did the work just had a brain fart and forgot check things. Monday night after work the head was pulled down AGAIN and taken to them on Tuesday. They finished their work on Tuesday afternoon and we reinstalled it on Tuesday evening. Thankfully when I was ordering parts I bought a head gasket by itself and sometime after I found someone selling a top end seal kit so I had a spare head gasket.

Everything is back together and running pretty good. It actually heats up to temp a lot quicker now that it has a thermostat in it ;D


Offline McDoof

  • #
  • *
  • Posts: 1088
Re: 1989 Coupe Quattro B3 - Project car
« Reply #28 on: November 15, 2019, 03:51:36 pm »
Always nice when things eventually fire up like they should.
NZ New MK5 GTI - Tuned by HSP Tuning
NZ New B6 Passat Variant 125kw TDI 4motion

Offline slowburn

  • #
  • *
  • Posts: 1804
  • how many is too many?
Re: 1989 Coupe Quattro B3 - Project car
« Reply #29 on: November 15, 2019, 06:54:44 pm »
where are you based man?
99 B5 S4 Avant
85 coupe quattro
72 fiat 124 coupe
97 corolla wagon

Offline JLTemp

  • Posts: 21
Re: 1989 Coupe Quattro B3 - Project car
« Reply #30 on: November 15, 2019, 07:06:27 pm »
Mid canterbury