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[Craig_R]

how on earth has the camshaft gotten rusty  :-? was this engine left standing for a long time before fin put it in ?

Thats the only reason i can think of

It would be better for you just to swap the heads over for better ones for piece of mind, they are really full of crud, Clean up the old heads reput back together and sell on

Craig

[Kevin Wood]

Not a pretty sight as you say. I think that engine was standing for a while  as said. Does the rust appear fresh or does it appear to have run with it?

If the rust is any more than a light coating on the surface it will have penetrated the hardened surface and the cams will wear rapidly...

Kevin
  

[tunnie]

the 2.5 and 3.0 heads are interchangeble i belive....

James!!!!  

But if i change the heads, that means i need to change the head-gasket!?

[tunnie]

Not a pretty sight as you say. I think that engine was standing for a while  as said. Does the rust appear fresh or does it appear to have run with it?

If the rust is any more than a light coating on the surface it will have penetrated the hardened surface and the cams will wear rapidly...

Kevin
  

I drove it to Nottingham & back just two weeks ago......

[Craig_R]

i would change the head gasket if i changed the head, but i doubt you would need a skim as it will not be warpped.

[Elite Pete]

Thats the problem you have when you buy from a breakers, there is no history and you dont know how long and under what conditions the engine has been stored

[tunnie]

i would change the head gasket if i changed the head, but i doubt you would need a skim as it will not be warpped.

If i can get away without chaning the heads i would prefer that, its just extra expense  

[Kevin Wood]

I don't believe the heads are interchangeable. The combustion chambers will be different volumes. However, whilst dirty, the heads should be OK.

I would replace the rusy cams, if they can't be cleaned up with some very light buffing with some fine, oiled wet and dry. 2.5 cams ought to be around. Enough people have upgraded them...

Have a look at the surfaces of the lifters before re-using any in case they have been scored by the rust too.

Does make me wonder if that engine has suffered a general lack of oil to the top end, looking at the muck, the fact that the cams have rusted, etc.. Bearing journals look OK though. :-/

Kevin

[Craig_R]

Does make me wonder if that engine has suffered a general lack of oil to the top end, looking at the muck, the fact that the cams have rusted, etc.. Bearing journals look OK though. :-/

Kevin

It looks like it has been starved of oil the top end as the oil that was already up there would burn under the heat and give you the mess you have also it would be another reason for the rust on the camshafts

Or i could be totaly wrong  

[VXL V6]

Judging by the state of the top end of that engine (I wonder what the bottom end is like - Oil pickup / pump etc), it's unknown history, it being an early engine in a late car and all the problems you've been encountering then would you not consider dropping another engine in it?

[tunnie]

Judging by the state of the top end of that engine (I wonder what the bottom end is like - Oil pickup / pump etc), it's unknown history, it being an early engine in a late car and all the problems you've been encountering then would you not consider dropping another engine in it?

Its getting to that point!

I did think oil pump, but if the oil pump had failed or low oil pressure, the engine would have let go in a big way by now?

Done 750+ miles in it since i got it, so it would have let go a long time ago!

Wondering if the oil feeds to the lifters got blocked an not enough oil is reaching the lifters?

[Marks DTM Calib]

What a nail......what an absolute heap of.......

That poor engine is in a bad way.

Any way, its got the early pump on so needs the early lifters (in theory) but, worth also cehcking what T vents are fitted (as I keep preaching).

Try buffing the cams up with some brassos, if they dont come clean then you have problems.

Its a pity because there was a set of 2.5 cams in the scrap metal that was in Jamies boot for the tip last weekend!

My view is that the engine you have is not worth a head change.........

[tunnie]

So I remove these 2 for the T Vents?



If its got the early pump whats the later lifters doing in there?

James has a full set of known good lifters (later type) try those?

[TheBoy]

What a nail......what an absolute heap of.......

That poor engine is in a bad way.

Any way, its got the early pump on so needs the early lifters (in theory) but, worth also cehcking what T vents are fitted (as I keep preaching).

Try buffing the cams up with some brassos, if they dont come clean then you have problems.

Its a pity because there was a set of 2.5 cams in the scrap metal that was in Jamies boot for the tip last weekend!

My view is that the engine you have is not worth a head change.........

The cams are still in the green box (been going done tip with just a couple of heads at a time), but if I'm honest I haven't been looking after them....

[Matchless]

So I remove these 2 for the T Vents?



If its got the early pump whats the later lifters doing in there?

James has a full set of known good lifters (later type) try those?

Yep, they are the T vents.
Remove them and clean throughly, there is a small hole in the torx head that will need poking out with a strand from a wire brush etc.

The engine has the early oil pump so should be re-built with early T vents and cam followers. Post a pic of the T vents (all 4) so we can work out what you have.

Clean the cam lobes with some 600 grit wet & dry soaked in oil then polish with brasso or solvol autosol (or any pumice based polish).

Im concerned that the oil ways in the heads could be blocked, can you get an oil can with flexible spout onto each of the cam bearing oil holes and cam follower oil holes? Pump oil through each hole to check that oil flows to adjacent holes.