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We were talking about this yesterday, a workmate has the Redarc & has fitted the probe in the top hose using a Davis Craig adapter.
As I see it the top hose and the thermostat housing will have...

A good rule of thumb is 50C is too hot to touch.
Graham

I thought that DRLs had to turn off when the headlights were on, so ignition to one side of the relay coil, other side of relay coil via a diode to headlight +ve, or x2 diodes for low & high beam...

A much older one, was showing off my "new" toy.
70386

I found a couple of old pics of an embarrassing situation, I drove over a "puddle" in the parking area for Denmark Easter markets.
Got towed out by another Patrol, the next day there was a Toyota...

The RB30 is not an older engine, it came out in the Holdens as their first unleaded petrol engine, the upper cylinder lube is to compensate for the lack of lubricating lead in old engines built to...

The vacuum advance line is before the throttle butterfly, when you open the throttle and suck more air through is causes a small change in pressure that operates a diaphragm to advance the ignition...

I had an ex NT government GQ many years ago, when it blew a bulb I found it had 90/140w bulbs, sealed beams had been replaced with H4 reflectors & upgraded loom with 1 relay for low beam & 2x for...

With such small quantities the margin for error is big enough to skew results, to get more accurate results you need to run to almost empty.
Another factor is how much petrol was used for start/warm...

The vacuum gauge readings are exactly what I would expect, back in the 80s some cars had vacuum gauges (marked economy gauges) in the instrument cluster & that is pretty much what you got.
At idle...

On the subject of stainless vs aluminiumised steel, the stainless is more brittle & prone to cracking. Unless it is a show car, go with the aluminiumised steel.

Sorry for coming in late.
Coolant is something like 7 times slipperier than water, so it will make belts slip.
Best solution for a noisy belt is a puff of talcum powder, with engine stopped of...

I would be looking at the dwell selector for dirty contacts.
Does the interior light operate properly with door switches?
I could be re-locking if it does not detect a door opening.
Graham

Picking up cool, clean air up near the top of the vehicle has to be better than getting air around wheel height.
Graham

Sounds like it has no thermostat.
Pressure build up could be head/ head gasket, any bubbles in the radiator when it is running (some people remove the thermostat to hide head gasket fault).
Dont...