Search found 517 matches

by Tom W
Fri Aug 28, 2020 4:20 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

Yes, worth getting hold of as a comparison, and swapping out to see if it makes any difference.
by Tom W
Fri Aug 28, 2020 3:51 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

That makes sense. I would remove the oil pressure relief valve again and thoroughly clean all the parts. Polish the piston too. If you can remove the cylinder, I’d do so and clean and polish that too. Maybe there’s a bit of crud somewhere in there that’s causing the valve to stick. It needs to be ab...
by Tom W
Fri Aug 28, 2020 10:04 am
Forum: Technical
Topic: pre-programmed curves on 123 ignition - help please?
Replies: 62
Views: 2908
Great Britain

Re: pre-programmed curves on 123 ignition - help please?

Ignition advance will affect MPG. We’re talking insufficient advance here. Since the spark fires too late, peak cylinder pressure occurs too late in the power stroke. Some of the useful energy that could be extracted from the charge is now wasted as heat down the exhaust. To propel the car at the sa...
by Tom W
Fri Aug 28, 2020 5:49 am
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

I see from your first post the gauge is tapped into the main gallery, downstream of the filter. In that case, the filter has nothing to do with the excess pressure you’re seeing. A clogged filter would reduce pressure. Your high volume oil pump will do a couple of things. It will lower the rpm at wh...
by Tom W
Thu Aug 27, 2020 3:30 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

Good stuff, hope you find the cause. If you want to clean the cooler bypass valve, the best way is probably to remove the whole filter head and access it that way. It’s visible with the filter head on the bench, without removing the brass plug. The plug’s more for closing the access drilling that’s ...
by Tom W
Thu Aug 27, 2020 2:51 pm
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

You’ve just replied as I’ve been writing this, so I’ll amend it to try and include answers to your question. As both gauges show the same behaviour, then I think you’re right to assume the it is representative of what’s happening in the engine. How many miles have you done on the engine before this ...
by Tom W
Thu Aug 27, 2020 6:33 am
Forum: Technical
Topic: Erratic Oil pressure- gauge/pressure
Replies: 26
Views: 817
Great Britain

Re: Erratic Oil pressure- gauge/pressure

This is puzzling. I’m not sure adding washers or stretching the spring is the right answer. The oil pump creates flow. Oil pressure is generated as there’s a difference in rate at which the oil can flow out of the bearing clearances, compared to the rate the pump supplies it. The pressure relief val...
by Tom W
Wed Aug 26, 2020 11:09 am
Forum: Series 2
Topic: Cooling fan wiring
Replies: 2
Views: 204
Great Britain

Re: Cooling fan wiring

Great, thanks
by Tom W
Tue Aug 25, 2020 9:52 pm
Forum: Series 2
Topic: Cooling fan wiring
Replies: 2
Views: 204
Great Britain

Cooling fan wiring

Hi everyone

The series 2 wiring diagram shows there’s an inline bullet connector in the 12v feed wire between fuse 6 and the cooling fan relay. Where is this connector located? I seem to have lost power between the fuse and the relay, and checking here seems a good place to start.
by Tom W
Mon Aug 24, 2020 4:48 pm
Forum: General
Topic: Cylinder head paint
Replies: 23
Views: 1152
Great Britain

Re: Cylinder head paint

Pretty sure mine’s painted silver. No idea if it’s original or not.
by Tom W
Sat Aug 22, 2020 5:32 pm
Forum: Technical
Topic: Distributor and starting car updated
Replies: 17
Views: 790
Great Britain

Re: Distributor and starting car

Very good point
by Tom W
Sat Aug 22, 2020 3:00 pm
Forum: Technical
Topic: Distributor and starting car updated
Replies: 17
Views: 790
Great Britain

Re: Distributor and starting car

First, you need to check the damper’s not shifted, and is an XJ6 part. E-type ones aren’t available new, so it’s not unusual to have to use the XJ6 part. When mine delaminated, it could be easily rotated by hand. You can make a temporary pointer until the proper one arrives. A piece of wire should s...
by Tom W
Sat Aug 22, 2020 1:37 pm
Forum: Technical
Topic: Distributor and starting car updated
Replies: 17
Views: 790
Great Britain

Re: Distributor and starting car

If that’s where your timing marks are when 1&6 are at TDC, then it looks like your crank damper has been replaced with one from an XJ6. They’re interchangeable with the E-type damper, except the timing marks are in a different position. They’re 6 O clock on the e-type damper, and about 2 O clock on ...
by Tom W
Fri Aug 21, 2020 10:22 am
Forum: Technical
Topic: Dellorto Conversion kit
Replies: 7
Views: 389
Great Britain

Re: Dellorto Conversion kit

It may have been a manifold and linkage designed for Webers. The mounting flanges are the same on both carbs.
by Tom W
Thu Aug 20, 2020 6:30 am
Forum: Technical
Topic: Front Crankshaft Oil Seal Replacement
Replies: 7
Views: 432
Great Britain

Re: Front Crankshaft Oil Seal Replacement

Buy the genuine seal from Jaguar, it will be the correct size. There isn’t a slot in the distance piece for the woodruf key. This is deliberate. Oil leaking through the slot was one of the ways the original style system could leak. The slot bypasses the seal. There’s a lip machined at one end of the...
by Tom W
Tue Aug 18, 2020 11:28 am
Forum: Technical
Topic: Front Crankshaft Oil Seal Replacement
Replies: 7
Views: 432
Great Britain

Re: Front Crankshaft Oil Seal Replacement

This shows some of the details better than I’ve explained.

http://www.georgiajag.com/Documents/Cr ... kSeal.html
by Tom W
Tue Aug 18, 2020 11:23 am
Forum: Technical
Topic: Front Crankshaft Oil Seal Replacement
Replies: 7
Views: 432
Great Britain

Re: Front Crankshaft Oil Seal Replacement

I did this job shortly after buying my car. The previous owner had already bought the newer style seal so I fitted that. My car’s a manual, so I put the car in gear to lock the crank and chocked the wheels so I wouldn’t push the car off the axle stands by rotating the transmission forward if the han...
by Tom W
Fri Aug 14, 2020 9:59 am
Forum: Technical
Topic: Oil cooler XJ6 on E type
Replies: 19
Views: 2511
Great Britain

Re: Oil cooler XJ6 on E type

Some Series 2 XJ6s had an oil cooler. Police cars, according to the parts books. And then the Series 3 4.2 XJ6 had the filter head and cooler most of the conversions are based on.
by Tom W
Sat Aug 08, 2020 1:18 pm
Forum: Technical
Topic: Gunson Gas Tester
Replies: 6
Views: 380
Great Britain

Re: Gunson Gas Tester

I have a colour tune too, somewhere. I’ll have to find that and see if that helps with setting up in conjunction with the gas tester. I never had much success with it on its own.
by Tom W
Sat Aug 08, 2020 10:08 am
Forum: Series 2
Topic: oscillating idle and lack of power
Replies: 23
Views: 1604
Great Britain

Re: oscillating idle and lack of power

I would connect the MAP sensor to the port on the carburettor where the original distributor vacuum advance canister was connected. With this method, you have some factory data for what the advance should be for known vacuum values measured at that point. If you take the feed from elsewhere, the tot...