The V8 Owners Forum -

Hi all,

Major Boo Boo ! When taking the old engine out my mate ripped apart the throttle linkage and I now have several springs, linkages and scary bits.

Having assembled them I feel that it might just not be quite right, well when you have two springs and a mal-functioning linkage it kind of gives it away.

I've trolled through the site and can't find any clear linkage stuff (OK maybe I missed it) so....

Can any of you guys running a Rover V8 3.5 EFi (flapper) with no cruise control maybe take a few pics of the setup particularly detailing the spring positions.

The smallest spring (return spring) is easy and well detailed in the manual. What Pees me off is that the manual is otherwise pretty crap.

One thing that I think may be very wrong is attached to the butterfly linkage a small Y shaped lever (upside down) fits into another lever (the return spring is linked between them) but if I remember clearly (which is rare) then there should be some play in the linkage that allows for the one linked to the butterfly assy to move independently so far before the throttle cable linked lever moves.

This is obviously important and needs to be spot on.

One benefit is that the actual butterfly in the plenum has not been moved and is still dead centre (phew).

Any help would be much appreciated.

Doc

i can do them i my sleep!
too late to go into the shed to take a close up, but i can get one tomorow if you want.

Hello Doc,

I Refined this drawing from the Microfische for Vitesse Manual Transmission Efi.



If yours is not the same as this then it may have come from a different car of the period - they are all similar but different, unfortunately.

SD1 Vitesse Auto, SD1 Efi Auto, RR, LR, - what have you? who knows?

Cool. It is somewhat different indeed. My one is on a 1987 EFi but this does definitely help.

What I need to think about is if I take the plenum back off and then remove the throttle cable I was wondering if there is enough clearance to get the whole assy off the engine and then rebuild the thing back together properly and re-install it.

Working on the thing with it in-situ is really fiddly and I don't want to drop any little bits down into the valley area or the intake.

Maybe I should just turn the whole thing around and extend the 9th injector pipe and wires and then re-locate the AFM and loom - Nah - bum idea that one. lol

If you lads know if it can be done "off engine" and then re-installed as a complete unit, let me know. I don't want to break the seals, remove all the bits and find it is a "no-install" in one type thing.

Grateful to the end as ever to you all for the advice.

Doc

Hello Doc, answers in red.

Dangerdoc wrote: My one is on a 1987 EFi but this does definitely help.

87 Efi What - they are all different. Someone may have the MF for your engine.

Dangerdoc wrote: What I need to think about is if I take the plenum back off and then remove the throttle cable I was wondering if there is enough clearance to get the whole assy off the engine and then rebuild the thing back together properly and re-install it.

Yes

Dangerdoc wrote: if it can be done "off engine" and then re-installed as a complete unit, let me know. I don't want to break the seals, remove all the bits and find it is a "no-install" in one type thing.

On my Vitesse the plenum was removed to the bench, all the throttle mechanism was dis-assembled there, plenum serviced and all re-assembled on the bench before refitting to the trumpet housing.
The same was true for my ex single plenum as there is still sufficient space to reassemble, because SP tunnel takes up less central space than the TP tunnels.

Hi Ramon,

Much appreciated. Spec above as a 1987 Range Rover Classic 3.5l EFi, single plenum, non cruise controlled engine and flapper type injection ( I think that makes it a 4CU controlled system).

Just in case it helps, right hand drive.

If it is missing some part of the spec I am not sure what part that could be so let me know if there are more things you need to know.

Doc

Dangerdoc wrote: 1987 Range Rover Classic 3.5l EFi, single plenum, non cruise controlled engine and flapper type injection ( I think that makes it a 4CU controlled system).

Hello Doc,

I reckon that makes the linkage pretty much the same as the piccy shown.

There would probably be an auto version but apart from kickdown I cant see any diff between the manual and auto throttle shaft linkages on my SD1 drawings.

I dont find it easy to follow these assy diags but you may be able to identify what parts are missing by elimination.

You may find that Rimmers sell a CD of the MF for your actual Car.

Good luck

Hi Ramon,

Fantastic. I'll have at peek at RB or give them a call.

I suppose as it is not a skeleton that is in the diagram it makes it harder for me to comprehent the bendy metal things.

Hang on - isn't that what the orthopaedic lads do - might poke it under their noses.

As always - very much appreciated.

All that remains now after assy of this section is to check the need for a ballast resistor - but that's another topic. lol

Indebited to you all for such amazing help.

Doc

Right, got the plenum off, and dismantled the linkage assy completely.

Gave it all a nice old clean and got is sparkly shiny

Looked at the diagram. Left and went for a cup of tea. Came back with tea, calmness and a determination that it would go together as all the bits were there.

Looked at the diagram again. Got confused, panicked, spilled tea and then went and got changed.

Came back with new tea, still confused

Started at one end and then put it back together - no diagram. Seemed OK until I noticed butterfly was not returning fully back to closed. Swore a lot !, Drank tea.

Thought for ages, applied the old "Spock" logic and thought look at the return spring on the main shaft linkage. Wear patterns indicated I had it in the wrong place. Took assy apart again, more swearing, fitted spring where wear patterns indicated it "should" go.

Looked at diagram, got more scared, put the lot back together. Seems to work fine.

Rain came - not under cover so got wet putting plenum and linkage back onto motor. Got more tea. Reached for torque wrench - more like torque drench in this rain, knocked over tea again - plenty more swearing.

Diagram soggy, plenum on, bolted back into position, linkages connected. Still scared as now ready to start it up for first time once ignition system confirmed by you guys (another post to follow - should be very interesting this one).

All help appreciated. - Still scared - britting shicks !

The bit that was confusing me was the spring (item 34) as not got one - never seen it. Might be because mine is Auto?

Doc

Hello Doc.

Here is another throttle linkage explosion but this one for the Auto Box Vitesse.

It's clearly different, hope it gets closer to your system.