Search found 3034 matches

by PeterCrespin
Mon Apr 02, 2018 5:08 pm
Forum: Technical
Topic: Bolt-on triple eared spinners
Replies: 6
Views: 300
United States of America

Re: Bolt-on triple eared spinners

Orson Engineering do them.

I think SC Prats (sic) sell them, but I had 'issues' with them unless I shopped in person when passing through Gatwick.
by PeterCrespin
Mon Apr 02, 2018 4:50 pm
Forum: Technical
Topic: Brake bleeding problems - silicone fluid
Replies: 44
Views: 931
United States of America

Re: Brake bleeding problems - silicone fluid

If one wants to change to silicone fluid what is the suggested way of doing it and clearing out DOT4? Geoff Do what your favourite coach operator seemingly did: Drive a Public Service Vehicle with a 'dangerous'/probably illegal mixture of incompatible hydraulic fluids until everything cures itself ...
by PeterCrespin
Mon Apr 02, 2018 4:32 pm
Forum: General
Topic: Looking for info on the W&P Sebring GT Hardtop
Replies: 1
Views: 176
United States of America

Re: Looking for info on the W&P Sebring GT Hardtop

Ah yes, Williams & Pritchard - the hard top for people who can't find an Ashley. A great way to make a 'Spitfire' look like a Tiger Moth' :bigrin: David found more photos for a previous thread. There was a photo of one in silver or some other light metallic so if yours isn't light coloured there are...
by PeterCrespin
Mon Mar 12, 2018 2:35 pm
Forum: Technical
Topic: Ticking noise from OD pump?
Replies: 3
Views: 248
United States of America

Re: Ticking noise from OD pump?

I'm a bit nervous, everything works nice, but if I now damage something I can redo almost the complete job Was going to suggest speedo cable stick-slip. It’s not normally heard unless cover is off, or at the top by the dash top being missing. Havibg listened to the noise I now doubt it has anything...
by PeterCrespin
Sat Mar 03, 2018 2:22 pm
Forum: Technical
Topic: Cam cover cut-aways
Replies: 8
Views: 672
United States of America

Re: Cam cover cut-aways

Hugo wrote:
Fri Mar 02, 2018 2:06 pm

The puzzle is how they come to be like this in the first place! The width of the cut-out is noticeably wider - though not by much - than the cut-away in the head.
Why is it a puzzle when your first sentence in this thread states the used cam covers you bought were never made for your engine?
by PeterCrespin
Sun Feb 18, 2018 11:51 pm
Forum: Technical
Topic: Cam cover cut-aways
Replies: 8
Views: 672
United States of America

Re: Cam cover cut-aways

The lack of compressibility of a groove-housed o-ring is not a problem at all....unless mis-matched parts are used and there is too large a ring for the groove. Possibly the two most critical joints in the engine are groove housed o-rings: (oil pump connections). Because they aren’t dowel located li...
by PeterCrespin
Sat Feb 17, 2018 11:18 pm
Forum: Technical
Topic: Cam cover cut-aways
Replies: 8
Views: 672
United States of America

Re: Cam cover cut-aways

It's not a problem, it's a change of design following a change of equipment (i.e. a change from AC tach, with consequent deletion of the bolted-on generator. Jaguar's initial fix was two neat alloy plugs/blanking plates with an o-ring that sealed the back of the head at the back of each cam cover. T...
by PeterCrespin
Fri Feb 16, 2018 3:41 am
Forum: Series 3
Topic: JD40 Sprocket Retaining Tool
Replies: 7
Views: 416
United States of America

Re: JD40 Sprocket Retaining Tool

panamacarrera wrote:
Thu Feb 15, 2018 9:38 am

Onward toward the next learning.
...which hopefully isn't "why does the long-cooked tensioner blade become brittle andxsnap if you suddenly release the chain tension?"
by PeterCrespin
Thu Feb 15, 2018 1:56 pm
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

"While not thermostatic in itself, there is a correlation between the temperature and viscosity of the oil and the action of the valve." I knew you'd say that! :-). Are you a politician? A response worthy of a Nicholas Winterton constituent. Reminds me of Eric & Ernie and Andre Previn, talking about...
by PeterCrespin
Thu Feb 15, 2018 1:33 pm
Forum: General
Topic: another one back on the road......
Replies: 17
Views: 786
United States of America

Re: another one back on the road......

Nice one Norman. Whose are the headlight trims?

Pete
by PeterCrespin
Thu Feb 15, 2018 12:52 am
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

Pedantry has its place in keeping on track. We started talking thermostats but seamlessly segued into pressure relief bypasses, which whilst sharing some features are not directly comparable. That meant some answers were correct for one but not the other. Original query was re an alleged thermostati...
by PeterCrespin
Tue Feb 13, 2018 10:21 pm
Forum: Series 3
Topic: 4 Speed Manual OD Gearbox Identification
Replies: 21
Views: 743
United States of America

ReQQ: 4 Speed Manual OD Gearbox Identification

If I HAD to use an early box on a V12, I’d fit an hydraulic throw-out bearing. Not any simpler but more places will probably know how to do it. Nit-pick alert: For the sake of newbies like the OP, we have to stop calling the correct overdrive a Type A. A Type A is the big version used on Mk2s etc. I...
by PeterCrespin
Tue Feb 13, 2018 7:55 pm
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

I’m glad you didn’t mention me Simon! I’m in the market for some racing bits from him and don’t want to fall out. George got back to me and there’s no mention in the parts books and he’s never heard or seen of it. Sorry. Here’s one housing I have. The oil cooler plugs are just loosely in place for o...
by PeterCrespin
Tue Feb 13, 2018 10:12 am
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

Interesting, thanks. I asked Nigel Boycott who worked for years in Jaguar’s engine building/engine rectification dept and has made his living building them ever since. He has half a dozen on the go ‘as we speak’. I’ll send you some pix of an S3 filter block. As a matter of interest, did you mention ...
by PeterCrespin
Mon Feb 12, 2018 10:54 am
Forum: Series 2
Topic: series 2 federal spec air filter
Replies: 9
Views: 457
United States of America

Re: series 2 federal spec air filter

On Johns comment about Strombergs I agree they are good carbs and when RHD conversion is complete I will do the modification to their full potential. Depends what you mean by “good”. These small non-adjustable carbs were fitted to lots of 1800cc and 2.0L four cylinder MGs and Triumphs, (or indeed o...
by PeterCrespin
Mon Feb 12, 2018 12:22 am
Forum: Technical
Topic: Clutch choices, and Release Bearing and Fork Woes
Replies: 22
Views: 967
United States of America

Re: Clutch choices, and Release Bearing and Fork Woes

" For similar hydraulic ratios, i.e. unchanged master - slave, a lighter pedal equals less effort on the thrust bearing and less wear on the crank thrust washer. Reductio ad Absurdam is - as usual - the best guide : a clutch with no springs equals no effort at the pedal." Hmm, at the risk of 'doing ...
by PeterCrespin
Sun Feb 11, 2018 7:23 pm
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

Just to confirm, no XK engine ever had an oil thermostat. The cooler fitted to some (mainly export?) late Series 3 XJs was a full-flow design that would have needed a bypass system to divert the flow when cold. No such bypass or temperature-dependent flow control ever appeared on the XK engine, only...
by PeterCrespin
Sat Feb 10, 2018 11:16 am
Forum: Technical
Topic: Clutch choices, and Release Bearing and Fork Woes
Replies: 22
Views: 967
United States of America

Re: Clutch choices, and Release Bearing and Fork Woes

“...Another benefit of a lighter clutch is less pressure on the rear crankshaft thrust washer, which will accordingly last longer and help maintain end float within specs. ” Not sure this applies Bob. I believe diaphragm clutches grip more tightly. At the risk of going well beyond any real knowledge...
by PeterCrespin
Sat Feb 10, 2018 10:32 am
Forum: Technical
Topic: Oil cooler position
Replies: 39
Views: 1715
United States of America

Re: Oil cooler position

Hi..... I'm building the car to be used in competition .... road legal yes ! .... but still being used for sprints. And hill climbs , with the view to race.... I’d say it depends on the type of competition. The wonderful sound you hear in the paddock at sprints and hill climbs is the sound of owner...
by PeterCrespin
Wed Feb 07, 2018 5:46 pm
Forum: Technical
Topic: Clutch choices, and Release Bearing and Fork Woes
Replies: 22
Views: 967
United States of America

Re: Clutch choices, and Release Bearing and Fork Woes

I've never seen ovalised release bearing ears or worn fork ends, but then I've never seen such a dry assembly. I'm not surprised things wore badly in a car that does significant mileage. The clips I've seen are like the one shown late in the thread where there are two parallel pins - one down the ce...