Engine upgrade

Hi Stina,

I am pretty sure that you mean the inlet valve seals, as there are none on the exhaust valves. The heads that you are currently using don't have any inlet valve stem oil seals. Does your engine blow smoke when you start it at the moment?

The factory stopped fitting inlet valve stem oil seals because they come off in use.

Ron.
 
SydneyRoverP6B said:
Hi Stina,

I am pretty sure that you mean the inlet valve seals, as there are none on the exhaust valves. The heads that you are currently using don't have any inlet valve stem oil seals. Does your engine blow smoke when you start it at the moment?
Ron.
Click to expand...

Hi Ron ,
Yes my mistake , inlet valves , Vacuum on the over run etc . No my engine doesn't blow smoke at the moment on start up ( unlike me :D )
SO run without them then ?
 
Hi Stina,

Apart from fact that they come off in use and that after Land Rover having initially fitted them to all 4.0 and 4.6 litre heads, stopped doing so because of reason 1,...they come off in use, I think that is a pretty good reason to leave them off. :wink:

Ron.
 
O.k Guys ,.
Been a bit of a while since i posted here , but i've not forgotten . Been collecting parts and info along the way . I have the heads and they're ready to go on , minus rocker gear . I just need to order the cam / followers and rocker shaft assemblies . That's all in hand . I'm planning to do the job around October time .
A few questions for you lot for now though .
1) What is a good method / product for cleaning up the valley ? I know from being in there before how much carbon builds up in there . Also the top of the pistons ( while still in their bores )
2) The final spec should be close to an SD1 engine on standard SU's all be it with a 3.9 cam . Maybe some induction mods in the future but not for a while yet . So can any one recommend a needle for the carbs ? I'm guessing standard SD1 but don't know , or for that matter even know what needles the SD1 used . Anyone ? Before anyone reaches for their key board advising rolling road sessions , let me save a big debate , it won't be going any where near one . I'm not rubbishing them , i just can't justify it , i've been over a year funding the parts so far .
3) Anyone know the size of the nuts that hold the carbs on ( thread size , not spanner size , even i know that :LOL: ) or a link to someone selling them .( HIF's )
Answers on a post card :D
Thanks
 
Hi Stina, when you've got all the ducks in a line, send me a list of everything on your engine, carbs, cam, exhaust, air filters and i'll run it through the SU carb program. Stan might be able to give you a good guess, or it might be on one of his OCCY threads too...

Rich
 
Good to hear this progressing stina. No steers from me on this as I'm all ears ready for my own engine rebuild. Not there yet as I need to raise funds etc too :roll:

On the subject of valve stem oil seals I read somewhere on another forum that these might help do the trick. I can't speak from experience but I've bought some for when I get round to rebuilding the heads on my engine.

Dave
 
I know you're a very clean person Stina (!), but I' wouldn't be inclined to do any cleaning at all in the camshaft chamber. It seems to me that the risk of leaving particles behind that you've dislodged during the cleaning process is greater than the satisfaction obtained from a clean area. The issue being such particles being washed along by the oil and ending up somewhere imoprtant.

The tops of the pistoons are a completely different issue. There's very little risk of anything you disturb getting into the oily bits, so have a good poke with a nice blunt screwdriver!

Almost counter intuitive that, isn't it. Leave the bits you'd expect to be clean and shiny filthy, and polish up the bits you expect to be sooty until they shine!

Don't forget the running in paste for the cam and that horrifying running in procedure, 20 mins from first start with the rebuilt engine at 2,000 rpm!

Chris
 
Thanks for the replys guys .
Rich ,
Final spec for the motor will be . standard (original) 9.25 /1 block , SD1 heads with tin gaskets , 3.9 landy cam , "S" exhaust manifolds ( so a little bigger bore than auto ones ) these are the only "mods" for the moment , and what i need needle specs for . I would imagine close to standard SD1 needles ? if you can find them on your app ? Exhaust system was on the car when i bought her , 2 box system , ( stainless ) Again close to SD1 as in not too restrictive , but not a noisy old piece of drain pipe !
Any hoo that's your home work Rich :shock: :D
Harvey ,
Efficient as usual , I knew it'd be you that came back with the size , Cheers , ordered stainless ones . ( Like a bit of bling ) :D
Dave ,
Been digging about too . Have you seen these http://www.ebay.co.uk/itm/Rover-V8-Valv ... 2c71656851
You probably have , buy worth reading the listing , seems you need the guides with them ?!
Chris ,
Yep , i'm already worried about melting the whole thing with the running in process :shock: But i'll be brave ( and have some spotters looking for potential trouble )
I'm amazed and at the same time pleased that you managed to refrain from directing me to a rolling road when it's all done ( still time though , will you resist ) :LOL:
Thanks folks .
:D
Edit
Had a look at those seals you linked to Dave , looks like they're suitable for year 76 on motors ? Am i missing something ?
Or is it that you are fitting later guides to your heads any way ?
 
sd1 heads are 76 on i guess? when you do the run in the cam i guess having someone ready with a hose pipe in case you need to top the rad up with coolant leaks etc? thats the bit that worries me most!
 
When I cleaned the heads and valley i tried a few things but white spirit and nitromors was the best.

I leave the heads on and brush it on, rinse and repeat. You can get nice little wire brushes to help with the baked on stuff.

Took me a long time to get on to the nitromors and spent ages with engine cleaners which were useless.

Colin












 
Hi Stina,

The needles that I would suggest you go for are BAK. I recall that Stan is running BAF needles on OCCY, but he has his K & N filters on the elbows running in the open air. With your filters inside the air canister, you can come back slightly in terms of richness.

Personally, I wouldn't be cleaning the tops of the pistons with anything. The possibility of accidently scratching the bore cannot be rules out, nor can the possibility of accidently digging into the piston crown. In any case, the piston crowns will be covered in deposits after only a few miles down the road, so all the time that is spent performing this task will be for nothing.

Ron.
 
In the old days we were taught to leave a ring of carbon round the edge of the piston to help compression .Don't know if that advice still stands

Did SD1's have SU's ? I thought they had Strombergs
 
DaveHerns said:
Did SD1's have SU's ? I thought they had Strombergs
Click to expand...

Early ones had SU's, later ones Strombergs.

And I agree about leaving the ring of carbon around the edge of the piston. If nothing else it means you're less likely to damage the bore, and old habits die hard.
 
More on the piston cleaning habits...

It's all too easy to push carbon particles between the piston and the bore, just above the compression ring, that start scratching your nice smooth bores with the engine running. I would say try to remove any big carbon deposits on the top of the pistons (if any...) while having at the same time the nozzle of an air cleaner sucking next to your scrapper, but overall don't be overenthousiastic. If you suspect that you have carbon particles between the piston and the bore, pour some engine oil in the piston - bore gap and turn the engine in order to move the piston slowly down. You you will the particles stuck on the bore. Wipe them and repeat the procedure until the descending piston reveals nothing but a clean bore.
 
This is one of those situations / jobs where as i have said in the past the good old house hold vacuum cleaner comes in handy . Although most of you guys wouldn't know where to find said machine :? :LOL:
 
stina said:
This is one of those situations / jobs where as i have said in the past the good old house hold vacuum cleaner comes in handy . Although most of you guys wouldn't know where to find said machine :? :LOL:
Click to expand...
The machine for cleaning. Do you mean one of these? :)

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