D24T.com  

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

Reply
 
Thread Tools Display Modes
  #1  
Old 11-05-2017, 10:37 AM
verdigo verdigo is offline
Senior Member
 
Join Date: Mar 2010
Location: Clarksville Tennessee
Vehicle: 83 245 D24T
Posts: 120
Default Settings for pump timing question.

It has been a while since I have messed with this car. I had given it to my son a year or so ago and he being young and hard headed drove it with a coolant leak. When I first built it I was unable to find a metal layered head gasket. Anyway he blew the gasket. I now have it back together to the point of setting the pump timing. I remember I think that here stated that 1.05mm was a good performance setting with no problems for the engine. I was thinking 1.00 would be a good setting for a little more pep. Anyone??
__________________
83 D24T 245 .50mm oversized pistons, 3 inch exhaust, but otherwise stock except the boost is turned up to 20 psi. 81 VW Caddy 1.6TD with some minor head work, and big exhaust.
Reply With Quote
  #2  
Old 11-05-2017, 11:12 AM
verdigo verdigo is offline
Senior Member
 
Join Date: Mar 2010
Location: Clarksville Tennessee
Vehicle: 83 245 D24T
Posts: 120
Default

I decided to shoot for .098, but after torquing the pump bolts down and another revolution to check it I am at .092, which is a tad above what Alldata says, and since it is going back to my son I guess I will leave it there. Could you tell the difference between .092, and .098 performance wise anyway?
__________________
83 D24T 245 .50mm oversized pistons, 3 inch exhaust, but otherwise stock except the boost is turned up to 20 psi. 81 VW Caddy 1.6TD with some minor head work, and big exhaust.
Reply With Quote
  #3  
Old 11-05-2017, 05:23 PM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,351
Default

Could you be off on your decimal point placement? Assuming you are talking mm, then I guess you meant .92mm. Alldata probably specs .86mm or nearby.

To your question: I probably couldn't perceive difference between .92 and .98mm. I figure there's at least that difference in the parallax viewing error introduced sighting the flywheel TDC mark thru the bellhousing cover pointer.

I usually aim for between .85 - .90mm and call it good.
__________________
1985 744 gle d24t
1985 745 gle d24t
Reply With Quote
  #4  
Old 11-06-2017, 06:48 AM
verdigo verdigo is offline
Senior Member
 
Join Date: Mar 2010
Location: Clarksville Tennessee
Vehicle: 83 245 D24T
Posts: 120
Default

Yeah. My decimal placement is off. Must have been thinking in inches as I typed. I figured the setting would be okay. Actually my base setting was around 87 which would have been okay by Alldata. As long as I have you here another question I have is about the cold start device. The wire on this thing that connects to the throttle lever is looking pretty bad. How hard to start will this engine be if I were to just leave it disabled (In the warmed up position)?
__________________
83 D24T 245 .50mm oversized pistons, 3 inch exhaust, but otherwise stock except the boost is turned up to 20 psi. 81 VW Caddy 1.6TD with some minor head work, and big exhaust.
Reply With Quote
  #5  
Old 11-06-2017, 07:42 AM
verdigo verdigo is offline
Senior Member
 
Join Date: Mar 2010
Location: Clarksville Tennessee
Vehicle: 83 245 D24T
Posts: 120
Default

Yes. Looks like my brain was having trouble making the change from American to metric. So yes my decimal placement was off. I better go have a look at that dial indicator
__________________
83 D24T 245 .50mm oversized pistons, 3 inch exhaust, but otherwise stock except the boost is turned up to 20 psi. 81 VW Caddy 1.6TD with some minor head work, and big exhaust.
Reply With Quote
  #6  
Old 11-06-2017, 11:26 AM
ngoma ngoma is offline
Supporting Member
 
Join Date: Nov 2009
Posts: 1,351
Default

Quote:
Originally Posted by verdigo View Post
How hard to start will this engine be if I were to just leave it disabled (In the warmed up position)?
Good call. The warmed up position is the preferred default setting in the case of inop. cold start mechanism. Otherwise, the IP timing is running too advanced during general operation.

The usual failure mode is a failed waxstat capsule. If the cable is frayed (and even if it is not), you should safety wire the adjustable stop on the end of the cable so it doesn't disappear when the cable breaks. Unobtanium.

IP cold start mechanism safety wire.JPG
example of "safety-wired" cold start stop

My experience with inop. cold start mechanism has been fine, in cars with all GPs functioning, decent compression, good battery, starter, and 5w-40 full synthetic motor oil, in temps down into the teens F. In low temps, the first minute may produce a lumpy idle and extra smoke.
__________________
1985 744 gle d24t
1985 745 gle d24t
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 05:00 AM.


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