Puppeteer

Author Topic: Lister CE decompression changeover damage  (Read 287 times)

Mtour

  • Newbie
  • *
  • Posts: 29
    • View Profile
Lister CE decompression changeover damage
« on: October 23, 2020, 04:18:53 PM »
Hi all..
 I have purchased a 1950 lister CE and am in the process of dissasmbaly and have found a exhaust valve and seat that are pitted badly. From what I can figure is the opening to the expansion chamber in the changeover has been blown out, and the debris damaged the valve and seat. I have a new set of the shafts but not the half bowl that makes the expansion chamber. Not sure if I should use the new shafts without replacing the half bowls, as the old shafts would be mated to the old bowls.. Also not sure if the bowl part of the expansion chamber is similar to other model lister...
I have attached some pics of the bowls of each cylinder,

 To me it looks like the damage has been done, could it be run like this..

Any Ideas.... Thanks..

« Last Edit: October 23, 2020, 04:21:45 PM by Mtour »

sirpedrosa

  • Hero Member
  • *****
  • Posts: 570
  • 21NOV2019 - Finally I hear that sound
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #1 on: October 25, 2020, 10:49:28 PM »
Hi Mtour,

Just lap valve seat, and COV doest look so bad.

BR
VP
By order of firing up:
Bernard 18A - 1968 (mama's water pump - year of my birth)
Petter PAZ1 - Jun 1967, 3HP, sn 416xxxx
Petter PAZ1 - Nov 1979, 3HP, sn 425xxxx
Lister 12/2 - 12651227, the pearl!

Mtour

  • Newbie
  • *
  • Posts: 29
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #2 on: October 27, 2020, 09:06:08 AM »
OK

Thanks for the reply..

listard-jp2

  • Hero Member
  • *****
  • Posts: 631
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #3 on: October 28, 2020, 06:48:45 PM »
If your interested I have NOS valve guides and head gaskets available for the Lister CE engine, PM me if interested.

Mtour

  • Newbie
  • *
  • Posts: 29
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #4 on: December 02, 2020, 10:54:31 PM »


 I tried lapping the valve, used a drill... the valve seat still has deep pits, didn't want to grind any more as the valve face and seat are starting to curve. Really not sure what to do about this..

mike90045

  • Mendocino Metro
  • Hero Member
  • *****
  • Posts: 1516
  • Mmmm BBQ
    • View Profile
    • Mikes Solar PV page
Re: Lister CE decompression changeover damage
« Reply #5 on: December 03, 2020, 04:07:53 AM »
Intake and Exhaust valves:
Valve heads recessed into cylinder head face by 0.055" Min to 0.100" Max
 Bump Clearance 0.045" to 0.050"
  Valve Seats (None OEM)
    Detroit Diesel series 92 valve seats are a very close replacement


I have a clone, and no change over system, but maybe it's seat is the same as the others ?

Mtour

  • Newbie
  • *
  • Posts: 29
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #6 on: December 03, 2020, 11:23:47 AM »
Thanks for the reply...

  Just not sure if the head should be taken to a machine shop and have a insert put in, or run it the way it is.

 thanks

 

Hugh Conway

  • Sr. Member
  • ****
  • Posts: 440
    • View Profile
Re: Lister CE decompression changeover damage
« Reply #7 on: December 03, 2020, 05:08:15 PM »
@Mtour......My 6/1 had badly recessed valve seats and also a damaged bore. The valve seats were fairly inexpensive to get replaced at a machine shop. At the same time, they re-sleeved the cylinder and replaced the valve guides. Money well spent.
If you are going to use that engine at all, you'll eventually want to refurbish the seats and valves anyway.
Cheers
Hugh
JKson 6/1  (Utterpower PMG ) Off-grid
Lister 6/1 Start-O-Matic engine......running with PMG
1978 Royal Enfield (glutton for punishment by Indian iron)
1963 BMW R-27 project