[Engine] What's this bit? Seized linkage at fuel pump area.

[GregS]

While poking around my vans engine the last few days I found a linkage mechanism which was seized.

It looks like it's part of the diesel pump but I'm just guessing. There's a cable that routes under the front of the engine but I can't trace where is connected to. I've freed off the mechanism and greased it, rotating it clockwise when the engine's running cuts the engine. The cable doesn't seem to move and in not sure what pulls it.

I couldn't get a good angle for the cable but this is the mechanism:

    ignore the white grease.

[brodfather11]

I'm assuming its a dw9 engine 1.9 d, some models had a cold start setup in which a cable was attached to a temperature sensitive tube in the cylinder head, under the fuel filter.

When cold it raises the idling speed and when hot it reduces it. Helps cold starts ? It didnt work very well as the thing kept seizing up or going U/S

[GregS]

I'm assuming its a dw9 engine 1.9 d, some models had a cold start setup in which a cable was attached to a temperature sensitive tube in the cylinder head, under the fuel filter.

When cold it raises the idling speed and when hot it reduces it. Helps cold starts ? It didnt work very well as the thing kept seizing up or going U/S

Yes, sorry forgot to add the model. It's a 2006 1.9D.

I've never had a problem cold starting as long as the glow plugs light goes off before cranking. I'll have a look at its operation once we get some cold weather. The mechanism moves freely now but I'm not sure about the cable.

Cheers.

[Tomcat3]

Im sure in the haynes manual it tells you how to adjust the cable, if you havnt got one you can download it on the forum somewhere.

[Sol]

It's operated by a waxstat. When cold, it is in the position to open the throttle a bit for idle speed control. When hot, the wax is melted and the small cylinder containing the wax moves the opposite way.

If disconnected, the idle is low when cold and needs a few seconds of throttle pedal before it idles smoothly. The bolt sets the idle speed for cold I think. My first 1.9D one failed and I disconnected it. Still started every time, but idled poorly till it warmed a bit and was prone to stalling when cold.

[GregS]

Cheers guys. I had a look at the Haynes manual so got an idea of its operation. I stripped it down, cleaned it and and greased it. The mechanism now moves but I'll need some cold weather to check the thermostat/cable function. I'm assuming the cable should pull and the lever turns anti-clockwise which would increase idle speed. Idle speed is normally healthy, never had idle issues.

[Romahomepete]

In our weather most folk with a seized one wouldnt know, it hasnt been cold enough for years.

Peter

[Sol]

Up in Scotland it's a bit different. A few weeks ago it was -2 one morning then 3-4 degrees for the next few days. We get single figures right through the winter and often negative in the mornings once winter sets in proper.

The need of a cold start or idle control will depend very much on where you live exactly.

EDIT: just checked, it's 1°C outside right now....so up in Aberdeen it will be lower. I'm in the central belt 100 miles south of the OP. I'd say if it's working today, you've got it sorted.