carnage 3ciii
Posted: Mon Mar 29, 2010 3:30 pm
Well i finally managed to find a minute to take a look at my old 3c.
I got the go ahead to buy what it needs to work properly so tore into the motor, as all has not been well for a while.
Pictorial record :-
3 hrs with a steamer and its yellow!
Rad top tanks not too clever either, some brazing to seal it back up, could do with a top tank but havent got funds to justify...
Ingenious use of wood for core plug or horrible botch, you decide (the latter for me)
Belt shredded, surprise...
I had a idea the exhaust was past its best...
Thatll be at least one of the water leaks though :-
Time to open it up after peeking round the edges.
Oil changes, previous owners have heard of them, in theory.
Uh oh, somethings not right here
Rocker arms are past their best, to put it mildly
Bent pushrod too, wonder whats caused that.
Head gaskets been blowing, by the amount of carbon on the faces. But yea gods , it has four pistons and the wear ridges aren't too bad!
Given the relative health of the liners and pistons, Im going to stop there. I think the rad pressuring can be laid at the feet of the head gasket (maybe previous recent rebuilder didnt torque it hot or something).
Plan now, buy a new gasket set, throw everything in the parts cleaner till its spotless including the spray bar orifices and buy some hardox rods and build up the rocker arms with weld and grind them back to profile (because I can do that myself in the workshop). The bent pushrod Im not sure of, I emailed peatland about replacements and tried to call them but no reply, and I cant find anyone who even lists replacement pushrods. I only need one, but I can always try bumping it true in the lathe.
I also need to find a way of measuring valve spring rate and what the spring rate should be, as they feel awfully weak although Im used to working on high revving motorcycle engines. But I can push the valves open with a thumb which doesnt feel especially right to me. But maybe it is, theres no kiss marks in the carbon on the piston from a valve head so nothing has been making contact to indicate over weak springs.
When its all back together, if its still running badly it has to be something ingested into the injection pump. At which point I may order one of these, and see if I can remember what the inside of one looked like from waaaay back in my late teens where I did some training on a rebuild and injection phasing bench. I know I can send it out and pay £500 and have it right, but the old girl doesnt really justify it sadly.
http://store.dieselcare.net/dparekitforl.html
And I need some more 48hr days...
I got the go ahead to buy what it needs to work properly so tore into the motor, as all has not been well for a while.
Pictorial record :-
3 hrs with a steamer and its yellow!
Rad top tanks not too clever either, some brazing to seal it back up, could do with a top tank but havent got funds to justify...
Ingenious use of wood for core plug or horrible botch, you decide (the latter for me)
Belt shredded, surprise...
I had a idea the exhaust was past its best...
Thatll be at least one of the water leaks though :-
Time to open it up after peeking round the edges.
Oil changes, previous owners have heard of them, in theory.
Uh oh, somethings not right here
Rocker arms are past their best, to put it mildly
Bent pushrod too, wonder whats caused that.
Head gaskets been blowing, by the amount of carbon on the faces. But yea gods , it has four pistons and the wear ridges aren't too bad!
Given the relative health of the liners and pistons, Im going to stop there. I think the rad pressuring can be laid at the feet of the head gasket (maybe previous recent rebuilder didnt torque it hot or something).
Plan now, buy a new gasket set, throw everything in the parts cleaner till its spotless including the spray bar orifices and buy some hardox rods and build up the rocker arms with weld and grind them back to profile (because I can do that myself in the workshop). The bent pushrod Im not sure of, I emailed peatland about replacements and tried to call them but no reply, and I cant find anyone who even lists replacement pushrods. I only need one, but I can always try bumping it true in the lathe.
I also need to find a way of measuring valve spring rate and what the spring rate should be, as they feel awfully weak although Im used to working on high revving motorcycle engines. But I can push the valves open with a thumb which doesnt feel especially right to me. But maybe it is, theres no kiss marks in the carbon on the piston from a valve head so nothing has been making contact to indicate over weak springs.
When its all back together, if its still running badly it has to be something ingested into the injection pump. At which point I may order one of these, and see if I can remember what the inside of one looked like from waaaay back in my late teens where I did some training on a rebuild and injection phasing bench. I know I can send it out and pay £500 and have it right, but the old girl doesnt really justify it sadly.
http://store.dieselcare.net/dparekitforl.html
And I need some more 48hr days...