No, I think you're on about the heater plugs on the cylinder head. Core plugs, are literally just a plug thats tapped into the block so that if the water freezes it will push the plug out instead of damaging the engine. Either that or they just corrode and leak. The plugs are highlighted in red...

A possibility I overlooked, was there any antifreeze in it when you had it?

Looks like an old perkins diesel.

I've seen an old forklift with a perkins engine that had an oil leak (same may be possible with a waterway). It was coming from the headgasket, we thought. turned out that the head had somehow cracked. That thing must have had a lot of abuse though. Hopefully thats not the case with yours, and...

A worn clutch or a problem with the hydraulics can give these problems. Try bleeding the clutch slave.

Best way to tell what carb it is, is to take it off and clean it up. Theirs bound to be a stamp on it somewhere. As for the oil filler, their was a rocker cover which had provision for an oil filler just in front of the breather dome piece. Looks like it may have a diesel rocker cover, but their...

Make sure you've got the remote axle breathers as well, would also recomend a wet suit :D

Series 3s boxes have syncromesh on the gears, There probably worn. Replace box, or find someone to rebuild it.

Never tried it but would'nt normal washing up liquid (in hot water) and a scrubbing brush work? washing up liquid is a surfactant and should separate oil. Or maybe washing powder. Or find a paint thats a very similar colour :D

I don't know about getting a longer prop but, what about running paras with normal shackles? Parabolics and shackles will both jack the bus up, if combined too much. Also won't the prop run a chance of touching the crossmember when going over awkward ground?

I know which ones youre on about, round and castellated. I definately used a socket, I think it was the castellated part that gave the socket grip.

When it came to undoing that nut on mine, im sure I used a regular socket that seemed to fit well enough, they should'nt be that tight.

Yeah it was a bit of a pain changing mine, I found undoing all the bolts (two on the top and four on the plate underneath) and then using a socket large enough to cover the spidle but small enough to pass through the chassis and a jack to jack it out of the chassis.

I think there may be adjustment at the steering box? but what I would do would be check everything for play, including the swivel housing king pins, and replace all the oils in the steering box and relay.

I'd say more nip and tuck :)

Fitted a defender heater box to my series, does anyone knoe if the bonnet is going to shut :) I still need to find one that isn't U shaped. And I think I may have to make up a wheel arch cover to sheild it tidy as the standard one will hit the cold air duct. Im also on the look out for a tunnel...

I,ve been toying with the idea of getting the rocky mountain steel grille. But not too sure.

I don't like the defender front end on a series, but their has to be a better alternative to the horrible plastic grille on a s3.

If I was him I would'nt be calling myself a mechanic. Im new to the forum btw and im a nearly qualified mechanic :D