D24T.com  

Go Back   D24T.com > Technical Discussion Area > Diesel Engine and Drivetrain

Reply
 
Thread Tools Display Modes
  #11  
Old 05-21-2020, 10:09 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Cooling system layout.
Existing radiator with current alternator location.


Dual radiator setup from an Audi turbo 100 or something similar




A mystery outlet at the bottom of the new radiator, not sure what I'm going to do with it yet.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg

Last edited by Nevadan; 05-21-2020 at 10:11 PM.
Reply With Quote
  #12  
Old 05-21-2020, 10:18 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

New radiators from another view


Mystery outlet at the bottom of the new radiator.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #13  
Old 05-21-2020, 10:22 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Existing alternator alignment to the front pulley. For some reason this picture is not showing.



Front pulley of 2.4TD with existing bracket which should fit the alternator relocation.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg

Last edited by Nevadan; 05-21-2020 at 10:25 PM. Reason: First picture not showing.
Reply With Quote
  #14  
Old 05-21-2020, 10:28 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Turbo's side by side, D24T on the right with the four bolts for the exhaust downpipe flange, no way these will be interchangeable which I was hoping for.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #15  
Old 05-21-2020, 10:31 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

T-handle wrench for headbolts and this one injector. '85TD Jetta in the background.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #16  
Old 05-21-2020, 10:36 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

End of day one, head's coming off tomorrow, oil pan and oil pump as well.


__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #17  
Old 05-21-2020, 10:42 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Water flow pictures with questions to follow
Outlet from the block which goes to the heater core, also showing the threaded fitting for the temp sensor which appears to be in/inside a larger threaded fitting in the head.


Return line from the heater on the left, I just had it looped when I test ran the engine.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #18  
Old 05-21-2020, 10:47 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Here's a picture of the thermostat as it sits in position viewed through the water pump hole.


And here's looking in the thermostat mount hole.
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
  #19  
Old 05-21-2020, 11:01 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

So here's my question, and this has been discussed here before.

With the thermostat cold, as shown in the first picture, the back of the t-stat is not closing the hole in the block which allows cold coolant to be sucked out of the head (as shown in the second picture), apparently close to where it's being pumped into the block. If the heater is off, the cable operated valve being closed, there's no coolant coming out of the back of the head/block, thus the coolant would seem to pool up and heat up at the back of the head and block while the circulating coolant around cylinders 1, 2 and 3 heats up more slowly.

In the second picture you can see the hole coming down from the head, which is where it's pulling the water from, so there's circulation near the first three cylinders and the corresponding part of the head.

When the coolant is hot the problem appears to be even worse since the back of the thermostat closes that hole and the only flow has to come from the back of the block, which wouldn't happen if the heater is off. I may be too tired and have missed something; is there another passage coming out of the block??

So my question is: how does the coolant circulate to and through the back of the head/block when the heater is off?

I'm considering plumbing in something so there's ALWAYS circulation to/through the back of the block/head even when the heater's off.

Has anyone done something similar?
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg

Last edited by Nevadan; 05-21-2020 at 11:05 PM.
Reply With Quote
  #20  
Old 05-21-2020, 11:09 PM
Nevadan Nevadan is offline
Senior Member
 
Join Date: Jan 2013
Location: Reno, Nevada
Vehicle: 740/745 D24T will be mine again soon
Posts: 253
Default

Quote:
Originally Posted by anders View Post
Sounds like a cool project!
I met a guy that was trying to do a similar project in yoncalla Oregon, he was hoping to use a d24t, but space didn’t allow so he acquired the 2.0TD to use. He has a HUGE collection of 80’s VW’s and 1.6 diesels.
Anyways, I always have lots of d24/d24t parts of you need anything for the project.
Good to know you have a lot of that era's engines. I remember ordering some Bosch nozzles from somewhere and giving you a tip on where I got them. I also bought that spare D24T turbo, which is in the picture, from you. I thought it would work on this engine but not to be.

I really like the simplicity of the 1.6, 2.0 and 2.4. No computer. There's value in that for me!
__________________
J.D. in Reno
1958 Mercedes 180D (rebuilding now)
1985 VW Jetta 1.6TD
1985 Volvo 745 Wagon 2.4TD (sold but still maintain it)
1987 VW Quantum Syncro 2.2 (converting to 2.0TD)
1996 TDI Passat
1997 Chevy 3/4 ton 6.5TD
2006 V10 TDI Touareg
Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -8. The time now is 03:37 PM.


Powered by vBulletin® Version 3.8.10
Copyright ©2000 - 2024, vBulletin Solutions, Inc.