adrian hogg
Well-Known Member
useful video here if you have not fitted em b4
Jyt2020
Member
I measured the bore and it is the same so the shroud must broken, and I suspect the broken piece in the hotspot is disturbing the ignition, but I can't get it out.
Anyways, I drove the car for a few miles and it doesn't smoke at all when driven, only when slowing down and idling (a lot then). but it is slow and doesn't start very well cold.
not sure what that is, maybe oil issue still....
Looks like the head will have to come off to investigate
Anyways, I drove the car for a few miles and it doesn't smoke at all when driven, only when slowing down and idling (a lot then). but it is slow and doesn't start very well cold.
not sure what that is, maybe oil issue still....
Looks like the head will have to come off to investigate
steve2286w
Well-Known Member
You can see the hotspot here retained by the roll pin, with the throttle closed this increases vacuum in inlet manifold as engine tries to suck in more air , this could also pull oil into cylinders through worn valve stem oil seals,
below is a check for the heater plugs, on original system one off all off.
below is a check for the heater plugs, on original system one off all off.
Attachments
Jyt2020
Member
black smoke normal? it's smokeless when idling... and small blue/white puffs when changing gear or decelerating.
Riggwelter
Active Member
Riggwelter
Active Member
Also, from my personal experience, this is what you don't want to happen (photos on page 2)...
tottot
Well-Known Member
Black smoke when accelerating [ loading the engine ] you said, most older type diesels will do that. Puffs when taking the power off point to wear in the injection pump drive.
Jyt2020
Member
hello back,
so the emissions failed the MOT miserably! unsurprisingly looking at the black smoke on acceleration but it's not that bad, and considering the pump was serviced and injectors tested I'm not sure what to do to bring the CO down...
I suppose a clean air filter and better adjusting the throttle link between pump and butterfly.
Interestingly it smokes more on early to mid throttle, and little at full throttle and none at idle, which makes me believe it has to do with lineage adjustment...
Anyone experienced this?
so the emissions failed the MOT miserably! unsurprisingly looking at the black smoke on acceleration but it's not that bad, and considering the pump was serviced and injectors tested I'm not sure what to do to bring the CO down...
I suppose a clean air filter and better adjusting the throttle link between pump and butterfly.
Interestingly it smokes more on early to mid throttle, and little at full throttle and none at idle, which makes me believe it has to do with lineage adjustment...
Anyone experienced this?
Jyt2020
Member
clean the oil and the filter element...
I agree on butterfly but it opens another can of worms with vacuum pipes etc...
pre 79 or 80 don't need test I think, not sure even. mine's 82...
tottot
Well-Known Member
Yea, Bummer on the date there. when it comes to vacuum do as divie did and fit electric pump triggered by brake switch.
Problem with butterfly is just as the engine is coming off the throttle at a time the engine could be sucking in fresh air to mix with the combustion gasses going down the exhaust it shuts to create the vacuum so your exhaust is not diluted as much as it could be on the rundown as it could be.
Problem with butterfly is just as the engine is coming off the throttle at a time the engine could be sucking in fresh air to mix with the combustion gasses going down the exhaust it shuts to create the vacuum so your exhaust is not diluted as much as it could be on the rundown as it could be.
Jyt2020
Member
looks like I can't avoid it,
but I wonder if it would work by just removing the butterfly and leaving the body with pipes connections...?
No it would not work just removing the butterfly. Remove the flap and put a 6mm or 1/4" bolt through the spindle hole, seal with rubber and plain steel washers.
If you have a vacuum tank fitted they are saleable. (I found out after binning mine) With the tank gone it frees up a bit of under bonnet space.
Fitting of electric vacuum pump is a sub 2 hour job including wiring for a relay, only short vacuum hoses are needed if you mount the pump on the bulkhead.
With an electric pump there is a downside. If you sit with your foot on the brake you will hear the pump working.
If you have a vacuum tank fitted they are saleable. (I found out after binning mine) With the tank gone it frees up a bit of under bonnet space.
Fitting of electric vacuum pump is a sub 2 hour job including wiring for a relay, only short vacuum hoses are needed if you mount the pump on the bulkhead.
With an electric pump there is a downside. If you sit with your foot on the brake you will hear the pump working.
steve2286w
Well-Known Member
I had the butterfly set up on my 84 diesel , and there is adjustment in them to ensure they open and close at correct time, obviously needed to ensure servo works. My mot man just looks at smoke , if yours is too smoky can you adjust timing , are injectors ok, now fitted a 200di and it’s a lot cleaner.
Jyt2020
Member
my MOT man was a d**k and didn't even try and help. I do believe that there is something not quite right in the linkage between butterfly and pump so I will do some tuning with another local garage who seems much more helpful and 'understanding' of old cars.
as much as the electric pump seems like a good solution, I am not ready yet to spend more £100s on this...
Jyt2020
Member
thanks a lot again, it's seems awfully expensive though...
Once the butterfly spindle holes in the manifold are worn along with the rest of the linkage you are chasing your tail. I am a toolmaker with a lathe and milling machine in the garage and re-bushed my manifold and linkage. Only a limited improvement was gained. £70 for the electric pump/relay kit was the answer, otherwise your Land Rover will sit on the drive. Try looking for a second hand vacuum pump for less money. No guarantee that it will cure your problems but it will eliminate an area.
Best of luck with your tinkering, I know how frustrating these old things can be.
Best of luck with your tinkering, I know how frustrating these old things can be.
Jyt2020
Member
£70 sounds a lot more reasonable that what I've seen so far in the region of £230...
May I ask where did you buy yours?
