The quick resurrection and fuel mileage of a 1989 Jetta Diesel - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• The quick resurrection and fuel mileage of a 1989 Jetta Diesel by vdubspeed on 06 Nov, 2011 05:53
• Around here I buy VW's to fix and resale. I love doing it because I get to breathe life back into an old VW. I've done some mk1's and mk2's but mainly it is the newer stuff like mk4's and B5's that I do(easier to find)
  
  Anyway, I just got done with my VR Golf a few months back (http://forums.vwvortex.com/showthread.php?5336517-A-Golf-VR-build...because-I-want-to.) and was actually going to do my first non-VW build(is300 donor into an AE86) but this cherry came up for sale on craigslist. After an hour drive to a farm I came upon a 1989 Jetta diesel that had been driven into the ground. The timing belt had let go and done some massive destruction. The shifter bushings did not exist, a dog lived in the back seat, and worse, years of driving on a dirt road allowed dirt to go EVERYWHERE.
  
  Here she is after her first wash pressure wash of of many:
  
  
  And the interior:
  
  
  Below is the reason she was down:
  
  
  So the first task was ripping the head off. I sent a decent head to the machine shop for a rework and why it was gone started on the body. I honestly spent 40-50hrs alone in cleaning and making her shine again. That includes pulling everything in the interior and the carpet and cleaning everything by hand.
  
  Anyway, when the head came back, I slapped the motor together and she fired up third crank and is running beautifully. FOR THE RECORD: I had the head resurfaced(gasp). The cups were popped out before hand and surfaced seperately. I peened them in place afterwards. My neighbor is an older gentlemen and has wanted me to find him a nice old diesel for a while. When I presented him the car and the price($2500), he jumped immediately.
  
  
  
  
  
  
  
  It now lives in his garage across the street. He's not a dubber but wanted something with good mileage. A few days ago he went on a 160mile highway/interstate trip and managed 48mpg by keeping it at the 60-70mph range and easing away from lights.
  
  Needless to say...he loves it.
  
  Question though: It's running great and doesn't leak at all but the Bentley says I have to do another 1/4 turn after 1000 miles. Is this absolutely necessary? I don't want to mess up a motor that doesn't leak and runs perfect. By the way it's a 1989 hydro block with a 1985 turbo mech head. I blocked the 3rd oil return in the block and the coolant passage in the head to make it work. Thanks
• #1 by DieselBalz on 06 Nov, 2011 07:40
• That thing cleaned up nice. Awesome carnage pic.
• #2 by RabbitJockey on 06 Nov, 2011 08:19
• some people don't do the extra quarter turn, and report no issues, with it being na i doubt it will ever be a problem, but i always follow the bentley and in the past i have always done the extra turn
• #3 by cyrus #1 on 06 Nov, 2011 17:48
• Very nice work! 
• #4 by clarkrep on 06 Nov, 2011 20:31
• Quote

  Very nice work!  Cool
  

  Indeed! Good call on switching out those alloys.
• #5 by ORCoaster on 06 Nov, 2011 20:59
• Great work there.  Now we all know where to bring our cars to get the same treatment.  What a deal.
• #6 by Toby on 07 Nov, 2011 09:15
• Quote

  
  Question though: It's running great and doesn't leak at all but the Bentley says I have to do another 1/4 turn after 1000 miles. Is this absolutely necessary? I don't want to mess up a motor that doesn't leak and runs perfect. By the way it's a 1989 hydro block with a 1985 turbo mech head. I blocked the 3rd oil return in the block and the coolant passage in the head to make it work. Thanks
  

  
  Yeah it is important. VW would not go to all of the trouble if it were not. You spent all of that money on the TTY bolts, why throw their advantage away? These things have chronic HG problems in all forms (4,5,6 cylinders) and the TTY bolts were an effort to solve it. The process works pretty well IF you do things just like they say. The cam cover gasket is $3, so why are you worrying if it will leak oil afterward?
• #7 by vdubspeed on 07 Nov, 2011 15:29
• so when VW built all these engines...did they have TTY bolts back then and if so...I wonder if people actually brought them back.
  
  As for the $3 gaskets. I don't use cork gaskets. They are ***. I convert all my 8V's to mk3 rubber gaskets.
• #8 by burn_your_money on 07 Nov, 2011 16:15
• I don't think I have ever retorqued the headbolts.
• #9 by vanbcguy on 07 Nov, 2011 16:46
• Quote from: vdubspeed on 07 Nov, 2011 15:29

  so when VW built all these engines...did they have TTY bolts back then and if so...I wonder if people actually brought them back.
  
  As for the $3 gaskets. I don't use cork gaskets. They are ***. I convert all my 8V's to mk3 rubber gaskets.
  

  
  With regard to the retorque, most new cars (especially back then) had some dealer service required around that point.
• #10 by Toby on 07 Nov, 2011 23:44
• Quote from: burn_your_money on 07 Nov, 2011 16:15

  I don't think I have ever retorqued the headbolts.
  

  
  Putting the last 1/4 turn on the stretch bolts is not "retorqueing", it is part of the original sequence. Any one who does not do it just like the book says is asking for trouble. Its free and makes the HG last a lot longer. When the final sequence is done the head bolts are basiclly springs which are much more  tolerant if the expansion/thermal cycling that chews up head gaskets on motors with aluminum heads.
  
  With 6 point, (non-TTY) head bolts you should retorque them EVERY time you have the cam cover off. They last vastly longer that way. In the old days this was done as a matter of course when the valves were adjusted on them "Ferrin" cars.
• #11 by ORCoaster on 08 Nov, 2011 10:29
• Some good points noted above that most may have forgotten in the last few decades.  First was the car has a maintenance schedule.  Most of our cars are capable of exceeding those mileages listed in the owners manuals.  Most of us have no idea if they were ever followed.  As cars have gotten designed to increase the interval between what used to be regular maintenance the complexity has gone up.  Not so for our cars but our memory for doing the prescribed basics seems to have faded. 
  
  And yes dealers used to do all this stuff but even back when charged an arm and a leg for it.  With Ferrin cars maybe two legs, just for spite that you didn't buy a Chevy or a Ford.
  
  You have to put yourself in the mindset of the times.  Shade tree mechanics was entitled that because that is where you went on that Sat. or Sun. afternoon to do the work for the spring or fall prep work.  My dad told me the main reason he was retiring 25 years ago is because they were designing the engines so only dealers could work on them.  He hated that idea.  I think most of us do as well.  The DYIer is slowly dying.  Long live the MK1 and 2s.
  
  Just think back in time and it all makes sense.
  
• #12 by rs899 on 10 Nov, 2011 06:44
• Not to be a fly in the ointment, but I purposefully did not do the last re-torque on my '91 Jetta - so far so good in 2 years/ 20k miles.  Also, my '82 Rabbit pickup (11mm) is running just fine thank you after 200K miles on it's last rebuild.  It has been so long since I rebuilt that engine (1997) that I don't remember what I did, but I haven't retorqued the head in many miles (if at all).  I personally would rather have a head gasket fail (and replace it) than run the risk of ruining a block.
• #13 by BigVWman on 10 Nov, 2011 12:36
• You should follow the manufacturer of  the headgasket's recommendations.(i have not seen that 1k retorque on an elring,goetze or reinze package i have used in a VERY long time) However to add to that comment: Stretch bolts, as modern vw headbolts are, should NOT be retorqued after 1000k miles!!!!!!! A stretch bolt when properly torqued has entered a plastic stage and stretched, in theory, achieving maximum clamping force at that time. If additional torque is supplied after 1k you will actually loose clamping force, as the bolt will begin to weaken. The 1k retorque we have all forgotten about from 20 years ago was pre-stretch bolt back when they were reusable, we forgot unpurpose!
• #14 by Toby on 10 Nov, 2011 22:46
• I think you should go back and reread the material that came with the last head gasket you used. I have done a 1.6D,  a 2.0D and a 2.4D in the last few months, all Elring, Goetze, and Reinze gaskets and ALL said to do the last 1/4 turn at 1000 km (600 miles) on TTY motors. Its part of the sequence to get them to the right spot in their plastic range. I think the paperwork is still sitting on the front seat of the Volvo, if you want me to scan and post it.
  
  BTW rs889, there is ZERO chance to damaging the block by retorquing a non TTY motor and it should be done regularly. Just because you have not been subject to a failure yet does not mean missing part of the factory maintenance is a good idea. All of these motors are notorious for head gasket failure; why would you purposefully ignore steps to increase its life?