D24T.com  

Go Back   D24T.com > Technical Discussion Area > Help! My car died!

Reply
 
Thread Tools Display Modes
  #21  
Old 10-07-2021, 12:00 AM
dahicori dahicori is offline
Member
 
Join Date: Mar 2020
Location: France
Vehicle: 1981 GL 245
Posts: 97
Default

that is this very bolt indeed

And yes that is the case, I set cylinder one to TDC before disassembling the engine. Well that's a good news! I will keep you updated
Reply With Quote
  #22  
Old 10-30-2021, 09:27 AM
dahicori dahicori is offline
Member
 
Join Date: Mar 2020
Location: France
Vehicle: 1981 GL 245
Posts: 97
Default

So it took a long time !!

But I finally removed the head.

I can see some cracks betweens the valves. but there is no others cracks around.

I am going to check for warpage now.
Reply With Quote
  #23  
Old 11-11-2021, 10:10 AM
dahicori dahicori is offline
Member
 
Join Date: Mar 2020
Location: France
Vehicle: 1981 GL 245
Posts: 97
Default



Hell you all, does this crack look bad to you?
Reply With Quote
  #24  
Old 11-14-2021, 08:10 AM
v8volvo v8volvo is offline
Supporting Member
 
Join Date: Jun 2009
Location: Montana, USA
Vehicle: '86 745, '83 764
Posts: 1,657
Default

Those are the usual cracks that almost all of the old series VW/Audi/Volvo diesels have.

The general rule is that as long as you can't fit your fingernail into it, it is OK. That one looks pretty normal, though you should check it.

Are there any other cracks in other locations, like from a valve seat to a prechamber? Other cracks would be a problem.

And, is the head surface flat or warped? I think that would be another major thing to check after the history on your engine.
__________________
86 745 D24T/ZF 345k lifted 2.5"
83 764 D24T/M46 155k
Reply With Quote
  #25  
Old 11-15-2021, 01:56 PM
dahicori dahicori is offline
Member
 
Join Date: Mar 2020
Location: France
Vehicle: 1981 GL 245
Posts: 97
Default

thanks for this answer! Well, I can say there is no crack around, the head seems on a visual range but I still did not run the test yet. I bought a 300€ petrol 1.2 twingo (famous french car) to replace the 240 , because I broke. And of course, the HG failed on this one too
I have to work on the little car before tackling the volvo again...

I do have another question : I think I remember one cannot have a head machined with more than 0.05mm of warpage. But some people told me ...that the machinist can "ignore" the manufacturer's recommandations and flatten the surface anyway. Would you agree? I looked for a second hand head and its simply impossible to find. a brand new head is above what I can afford to have my car back on the road again...
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 04:16 PM.


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