Search found 755 matches

by MarekH
Wed Aug 14, 2019 8:19 am
Forum: Series 3
Topic: Exhaust manifold
Replies: 7
Views: 527
Great Britain

Re: Exhaust manifold

The larger diameter thread to mount the heat shield to the manifold was introduced when exhaust gas recirculation was added as part of the US emissions package. The earlier thinner manifolds are no longer avalable so all replacements have the larger diameter threaded holes for the heat shields. The ...
by MarekH
Wed Aug 07, 2019 4:47 pm
Forum: Series 3
Topic: Tuning Problems V12
Replies: 46
Views: 1727
Great Britain

Re: Tuning Problems V12

I wouldn't confuse the engine water temperature with the air temperature. There is only 19 litres of water circulating (and only a fraction of this resides in the radiator) but a massively huge volume of air being pumped. The Otter switch hysteresis is about 10'c, so 10'c drop in water is spread ove...
by MarekH
Sat Aug 03, 2019 10:18 am
Forum: Series 2
Topic: Series 2 indicator not working
Replies: 5
Views: 239
Great Britain

Re: Series 2 indicator not working

Dear Tom, You'll have to download a wiring diagram for your car and look at what that wire may be connected to. It may not be an indicator wire, but perhaps flash the headlight or beep the horn. The fault might lie elsewhere, e.g. with the wiring to the flasher can, the earth connection or with the ...
by MarekH
Sat Aug 03, 2019 10:12 am
Forum: Series 3
Topic: Nightmare: new windscreen for series 3 OTS
Replies: 17
Views: 664
Great Britain

Re: Nightmare: new windscreen for series 3 OTS

Just ask Pilkington directly. They can then direct you to one of their agents or supply themselves. There was a thread about other etype windscreens elsewhere on this forum and David Jones documented his factory visit and listed their contact details there.

kind regards
Marek
by MarekH
Thu Aug 01, 2019 7:09 pm
Forum: Technical
Topic: Small Engineering Company offering great value
Replies: 1
Views: 236
Great Britain

Re: Small Engineering Company offering great value

I remember looking in the Martin Robey catalogue when I needed new pistons for the rear brakes on my s3. The price for the standard piston was £10 and the next line had the price for a stainless steel one - £10.50. It was a bit of a no brainer as to which ones I bought.

kind regards
Marek
by MarekH
Wed Jul 31, 2019 11:26 am
Forum: General
Topic: V12 Engine man
Replies: 9
Views: 438
Great Britain

Re: V12 Engine man

If your fans fail and you overheat, but your engine is still running, then you can get the temperature down to sensible levels with this procedure. It is also useful if you arrive at your destination hot after a lot of stop-go traffic. See https://forums.jag-lovers.com/t/solving-heatsoak-a-worked-ex...
by MarekH
Tue Jul 30, 2019 12:18 pm
Forum: Series 3
Topic: oil pressure woes
Replies: 32
Views: 2646
Great Britain

Re: oil pressure woes

If you have brass fittings at either end, then you can simply solder up a copper capillary tube between them. To make sure you have no problems with vibration or having it go around corners, simply coil the capillary tube many times over. That's what I have on my car.

kind regards
Marek
by MarekH
Sun Jul 28, 2019 10:36 am
Forum: Series 3
Topic: Fuel Pump Electric Supply
Replies: 6
Views: 327
Great Britain

Re: Fuel Pump Electric Supply

Dear Toby, The s3 has two fuel pumps mounted back to back with each other. The black earth return is common and comes through the chassis of the pump. The white, unfused, 12v feed comes via a Lucar connector mounted on either end of each pump. As you have the pumps out of the car, you can test the i...
by MarekH
Tue Jul 23, 2019 9:52 pm
Forum: Series 3
Topic: Air INtake Temperature Sensor - Mounted
Replies: 3
Views: 150
Great Britain

Re: Air INtake Temperature Sensor - Mounted

Dear Toby,
If the bellows don't hold vacuum then it'll be academic, but it doesn't matter any way, as one side leads to blind dead end and one side goes to manifold vacuum.
Do whatever fits best.

kind regards
Marek
by MarekH
Sun Jul 21, 2019 4:46 pm
Forum: Series 1
Topic: 123 Tune which Coil?
Replies: 47
Views: 1232
Great Britain

Re: 123 Tune which Coil?

From post #28, the clue as to the reason why "that curve" has so much advance low down is that you say it comes from a race car company. It probably relates to an engine with a high lift camshaft. High lift cams typically have a lumpy idle at low rpm, so to make idle smoothly, the advance is bumped ...
by MarekH
Sun Jul 21, 2019 3:06 pm
Forum: Series 1
Topic: 123 Tune which Coil?
Replies: 47
Views: 1232
Great Britain

Re: 123 Tune which Coil?

Here's what I think happens:- 123 looks up a number in the table and advances the rotor that amount. The first line in the table is 500rpm and 9' advance. 123 doesn't care whether you are at 0rpm or anywhere up to 499rpm - it advances the rotor 9' because that's the first number in the table and you...
by MarekH
Sun Jul 21, 2019 2:25 pm
Forum: Series 1
Topic: 123 Tune which Coil?
Replies: 47
Views: 1232
Great Britain

Re: 123 Tune which Coil?

Why does the crank turn at twice the speed of the distributor?

Because the instructions are in double-Dutch !!

Seriously though, do the instructions at any point not have a line that says "Check the timing with a timing light" or do people just leave this to chance?

kind regards
Marek
by MarekH
Sun Jul 21, 2019 7:50 am
Forum: Technical
Topic: Engine Rebuild or not?
Replies: 5
Views: 357
Great Britain

Re: Engine Rebuild or not?

Dear Myles, What you are telling us is that the water finds it easier to blow out a core plug and weep out of the block than it is to circulate back around. Then that was still true after a core plug was replaced. With the benefit of hindsight, the weeping is probably a milder symptom of the same th...
by MarekH
Sat Jul 20, 2019 9:58 pm
Forum: Technical
Topic: Brake Warning Light
Replies: 7
Views: 298
Great Britain

Re: Brake Warning Light

You can bypass the pdwa if you want to. The standard brake pipes are just long to reach the servo on their own, but you have to swap the front and rear circuits to make them reach.

kind regards
Marek
by MarekH
Sat Jul 20, 2019 10:05 am
Forum: Series 1
Topic: 123 Tune which Coil?
Replies: 47
Views: 1232
Great Britain

Re: 123 Tune which Coil?

Dear Andrew, The 123 website specifically recommends the Bosch blue coil and says don't use the gold coil, as echoed by Andrew in Australia, so SNGB haven't supplied what the manufacturer recommends. Conveniently, no one introduces or reminds you that you are now dealing with electronics in a hot an...
by MarekH
Sat Jul 20, 2019 7:24 am
Forum: Technical
Topic: Carb jet height/depth conundrum
Replies: 16
Views: 626
Great Britain

Re: Carb jet height/depth conundrum

It's already wired up to a gauge. You just need to connect up 12v and earth. It is a spare I made up, left over from the fuel injection project.

kind regards
Marek
by MarekH
Fri Jul 19, 2019 3:08 pm
Forum: General
Topic: Is ethanol free fuel still available?
Replies: 18
Views: 967
Great Britain

Re: Is ethanol free fuel still available?

Thank you for squaring that circle.

It's a very opaque thing for them to have done. They should at least tell their forecourt managers that it is E0 (for now) but instead they have hedged their bets and covered their backsides and mislead their customers.

kind regards
Marek
by MarekH
Fri Jul 19, 2019 2:42 pm
Forum: Technical
Topic: Carb jet height/depth conundrum
Replies: 16
Views: 626
Great Britain

Re: Carb jet height/depth conundrum

I have a spare wideband lambda sensor that can go in tailpipe if you want to pop round and test yourself.

kind regards
Marek
by MarekH
Fri Jul 19, 2019 1:09 pm
Forum: Series 3
Topic: How to test voltage regulator.
Replies: 14
Views: 384
Great Britain

Re: How to test voltage regulator.

Dear Mark, Disconnect both battery terminals so you don't do yourself any harm. Then measure the resistance between alternator field to regulator field, alternator plus to regulator plus, alternator plus to disconnected battery plus lead, alternator case to disconnected battery neg, alternator case ...
by MarekH
Fri Jul 19, 2019 12:58 pm
Forum: Series 3
Topic: How to test voltage regulator.
Replies: 14
Views: 384
Great Britain

Re: How to test voltage regulator.

In case you haven't noticed, you have miserably failed your voltage test number 1. That's why the regulator isn't regulating - it doesn't have anything to regulate. You either have lost it on the +ive wire on the way to the regulator because of a very high resistance, on the negative way back to the...