Search found 520 matches

by johnetype
Thu Sep 03, 2026 10:29 am
Forum: Technical
Topic: gearbox soundproofing
Replies: 4
Views: 180
Great Britain

Re: gearbox soundproofing

In my case I was able to reuse the original piece of foam but given the amount of oil it was impregnated with I very much doubt it would much difference if it was fire retardant foam or not. If your proposed piece of foam has come from a sofa meeting current regulations, would it not be fire retarda...
by johnetype
Mon Aug 31, 2026 9:33 pm
Forum: General
Topic: Insurance and old cars
Replies: 8
Views: 620
Great Britain

Re: Insurance and old cars

I've been in a similar situation myself so I have some understanding and appreciate the rules over taxation and insurance have some perversities but why didn't you just declare SORN??? Given we don't have to pay any road tax for a classic car it's easy to switch between taxed and SORN at the click o...
by johnetype
Mon Aug 31, 2026 9:24 pm
Forum: Technical
Topic: Headlamp scoops series 2
Replies: 1
Views: 117
Great Britain

Re: Headlamp scoops series 2

As they left the factory, no, no sealant but in today's world in the fight against corrosion you'd be mad not to refit the scoops without a thin layer of sealant to keep moisture out of the inevitable mismatches between the scoops and bonnet.
by johnetype
Sun Aug 09, 2026 6:01 pm
Forum: General
Topic: Sports exhaust
Replies: 16
Views: 1020
Great Britain

Re: Sports exhaust

There's definitely wadding inside, can't recall over baffles, so you're left with more than just a straight through pipe would be. Somewhere I've seen a drawing/image of the standard centre box cut open but can't find it.
by johnetype
Sun Aug 09, 2026 1:08 pm
Forum: General
Topic: Sports exhaust
Replies: 16
Views: 1020
Great Britain

Re: Sports exhaust

I have the same arrangement as RFS1957 describes above created by taking the standard mild steel system bought from Jaguar and then drilling out the two baffles. Sound is as he describes and for me is the perfect balance given the standard system with the baffles left in the centre boxes is just too...
by johnetype
Fri Aug 07, 2026 12:37 pm
Forum: Technical
Topic: Otter switch earth?
Replies: 16
Views: 1072
Great Britain

Re: Otter switch earth?

Yes, but that's not the point. Allrand said the header tank had to be earthed because it is rubber mounted and that is simply not true.
by johnetype
Fri Aug 07, 2026 10:09 am
Forum: Technical
Topic: Otter switch earth?
Replies: 16
Views: 1072
Great Britain

Re: Otter switch earth?

Yes but the header tank itself needs to be earthed because, as the OP mentioned, it's rubber mounted. No, Andrew is correct, the header tank doesn't need to be earthed, it's the body of the Otter switch that needs be earthed and it's connected to earth by the lucar under the bolt head as shown in t...
by johnetype
Fri Jun 19, 2026 1:27 pm
Forum: General
Topic: Attention....loss of Images
Replies: 46
Views: 31112
Great Britain

Re: Attention....loss of Images

The VPN issue is a sideshow; the critical resource for the forum is its IP and that's embodied in the data and images posted by everyone. If we choose to give ownership of that IP away to Third Party sites to host that data for free we loose control and become hostage to fortune to their inevitable ...
by johnetype
Mon Jun 15, 2026 10:49 am
Forum: Technical
Topic: Thinner than usual valve pads
Replies: 36
Views: 5931
Great Britain

Re: Thinner than usual valve pads

You certainly can shorten the valve stems by a certain amount - when I had a late large valve head rebuilt recently, they removed the same amount from the end of the valve stem to equal the amount the valve face lapping had moved the valve up by to save finding new shims - but I doubt you could shav...
by johnetype
Thu Jun 11, 2026 10:28 am
Forum: Technical
Topic: Voltage across coil terminals
Replies: 11
Views: 4070
Great Britain

Re: Voltage across coil terminals

Steve, this is just not correct. If you measure a voltage without any current flowing you will get zero voltage drop and hence it's pointless. If you do what the other Steve has suggested and disconnect the wire at the coil +ve and measure the voltage what you're actually doing is measuring the volt...
by johnetype
Thu Jun 11, 2026 8:16 am
Forum: Technical
Topic: Voltage across coil terminals
Replies: 11
Views: 4070
Great Britain

Re: Voltage across coil terminals

Once you disconnect the wire to the coil +ve all voltage measurements are meaningless because you've broken the circuit and no current can flow. It's not the normal operating condition. It's why Tom added his caveat in post #5 because you need the points closed for current to flow.
by johnetype
Wed Jun 10, 2026 10:46 pm
Forum: Technical
Topic: Voltage across coil terminals
Replies: 11
Views: 4070
Great Britain

Re: Voltage across coil terminals

No, Steve's test tells you nothing except that you've got continuity between the coil +ve terminal and the battery +ve terminal - and you knew that already because the car starts and runs. There's a long length of wire with several connectors in it between the coli +ve terminal and the battery +ve w...
by johnetype
Mon Jun 08, 2026 10:07 pm
Forum: Series 2
Topic: Play in steering wheel
Replies: 11
Views: 143743
Great Britain

Re: Play in steering wheel

I have the same problem; may I ask what your solution was?
by johnetype
Mon Jun 08, 2026 10:01 pm
Forum: Technical
Topic: Voltage across coil terminals
Replies: 11
Views: 4070
Great Britain

Re: Voltage across coil terminals

It may be fine but I'd also measure from the coil negative to ground and from coil positive to battery positive to understand where the nearly 2 volts is going.

Once you know where and how much all the voltage drops are in the circuit can you make a better judgement on what's alright and what isn't.
by johnetype
Sun May 31, 2026 9:17 pm
Forum: Series 1
Topic: 2+2 windscreen seals
Replies: 5
Views: 2131
Great Britain

Re: 2+2 windscreen seals

Based on my experience, you need both. The main seal comes (from COH Baines) to a set length with the ends welded/glued together which is what you need to prevent leaks. The second seal is the locking strip which is sold by the meter. Here you need to make sure you have enough because you want your ...
by johnetype
Sun May 31, 2026 8:15 am
Forum: Technical
Topic: Fuel Pump
Replies: 4
Views: 2261
Great Britain

Re: Fuel Pump

From my experience with the same pump, no, nothing to worry about.
by johnetype
Sun Apr 19, 2026 9:16 pm
Forum: Technical
Topic: 1964 3.8 Cylinder head temperature
Replies: 8
Views: 5356
Great Britain

Re: 1964 3.8 Cylinder head temperature

That type of infra-red temperature gun generally measure the average temperature within a circle whose diameter is dictated by how far the gun is from the surface in question - not just at the point the red dot is. Given how far away you appear to be from the cam covers I strongly suspect their actu...
by johnetype
Mon Apr 06, 2026 8:06 am
Forum: Technical
Topic: Washer jet replacement..
Replies: 3
Views: 3164
Great Britain

Re: Washer jet replacement..

Use jets from a 2+2 that have two jets each. Use silicon rather than PVC washer hose. Find someone with small hands to help. Connect the hose to the jet and feed the hose in from outside the car. Slide the nut back up along the hose from the inside so the hose guides the nut onto the end of the jet....
by johnetype
Mon Feb 23, 2026 9:58 pm
Forum: Technical
Topic: SU fuel pump circuit breaker spark
Replies: 4
Views: 3176
Great Britain

Re: SU fuel pump circuit breaker spark

Varistor or capacitor, both will do a similar job in this application. If you were to use a large non polarised capacitor such as those across the input to a power supply your pump would remain polarity insensitive. A capacitor would be a better choice for suppressing RF radiation so would be my cho...
by johnetype
Tue Jan 27, 2026 9:55 am
Forum: Series 2
Topic: Cylinder Head Woes
Replies: 16
Views: 34378
Great Britain

Re: Cylinder Head Woes

That story has been around for a few years now. Whilst there are undoubtably fakes around I'm more dubious that the major suppliers have been taken in, in any significant way. There are videos out there comparing fakes with originals and in the ones I've seen the fakes are pretty obvious with errors...