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Posts by Mark Rosenbaum
532 postsShowing posts 1-40 of 532

Brakes > Help caliper pistons and new pads (30 replies - 29740 views)

Re tipping valve. The tipping valve shuts off the connection between the brake fluid reservoir and the bore for the master cylinder's rear piston.  When the ...   06-20-2007 05:44 pm

Brakes > Help caliper pistons and new pads (30 replies - 29740 views)

Joel wrote: Ok, so they worked fine for a day or so.  I gave them more of a workout today and the pedal is almost ...   06-20-2007 04:39 pm

VIN Database for Jensen Healey & Jensen GT > VIN NUMBER / ENGINE NUMBER (1 reply - 6944 views)

Yes.  Richard Calver's book.  I've seen it offered for sale at the club store.  It's not always available, though. ...   06-13-2007 03:51 am

Body & interior stuff > Door interiors (4 replies - 4645 views)

New fiberboards are available from Delta Motorsports for a reasonable price.  They fit. ...   06-11-2007 02:47 am

Carburetors > what else is there left to do? just the strombergs I guess (5 replies - 6668 views)

Yes, the vacuum valve (AKA air valve) is the piston-like part.  It has a steel tube that slides up and down inside a mating steel tube ...   06-06-2007 09:10 pm

Carburetors > what else is there left to do? just the strombergs I guess (5 replies - 6668 views)

Yes, that looks like the right tool.  Delta Motorsports also sells them, and the Club Store may also handle them. IIRC, raising a vacuum valve and having ...   06-06-2007 04:50 pm

Miscellaneous > Humo(u)r (0 replies - 2680 views)

For what it's worth, I just ran across this site:  http://www.mez.co.uk/lucas.html It's got a cute fuse drawing, the usual Lucas japes, the text and photos from ...   06-06-2007 01:40 am

Engine & Transmission > Breather w/K&Ns (8 replies - 7097 views)

The reducer is just a couple of brass fittings that I had on hand, that would fit together and happened to be the right sizes to ...   06-04-2007 02:35 pm

Engine & Transmission > Breather w/K&Ns (8 replies - 7097 views)

See http://jhppg.com/gallery/album76/DSC00013 for a photo of what I did on my car.  The fittings are all standard nylon bits from the local hardware store, the bushings ...   06-04-2007 04:28 am

Carburetors > what else is there left to do? just the strombergs I guess (5 replies - 6668 views)

Presuming that the Pertronix coil is the type that works without a ballast resistor, that your valves are sealing and your compression is good, and that ...   06-02-2007 05:50 am

Carburetors > Frumpy idle (18 replies - 13232 views)

smcmanus wrote: Needles......oops B1CM front which came with the car; B1DK rear which came with the spare carbs.   Can I use the B1DK needles in ...   05-20-2007 07:22 pm

Carburetors > How to get WOT from Strombergs? (1 reply - 3708 views)

First, check to see if your throttle pedal contacts the car's floor before wide-open-throttle has been obtained.  This could be due to a bent throttle pedal or the ...   05-20-2007 03:50 am

Carburetors > Frumpy idle (18 replies - 13232 views)

(1) Ensure that the fuel float in each carb is set to the identical level (0.688" nominal), and that the same thickness washer (0.087") is used under each ...   05-17-2007 04:53 am

Engine & Transmission > electric fuel pump bypass (3 replies - 3966 views)

I agree with Steve.  I've had a Facet / Purolator pump in my car for about six years now and it's still going strong.  And as pumps of ...   05-17-2007 04:33 am

Brakes > Help caliper pistons and new pads (30 replies - 29740 views)

You can also use the calipers from a later Spitfire.  There are some minor differences but AFAIK they are not significant.  And JH pads will ...   05-14-2007 04:28 am

Carburetors > Out of tune Stroms causing sputter/rough running? (3 replies - 5363 views)

At the absolute minimum, there should be a filter upstream of the fuel pump to protect the pump from rust and debris in the fuel ...   05-14-2007 04:20 am

Body & interior stuff > carpet (3 replies - 5076 views)

I concur.  I installed one of Delta's carpet kits 5 or 6 years ago and it still looks very good.  The only drawback was that ...   05-04-2007 05:06 am

Electrical & Instruments > Which wire goes to to the temp sending unit? (7 replies - 7035 views)

Well, yes, if the bare wire is shorting to the engine block, then the gauge will read high.  The way I read your question, though, it ...   05-02-2007 10:48 pm

Electrical & Instruments > Which wire goes to to the temp sending unit? (7 replies - 7035 views)

If the measured coolant temperature is circa 160° the gauge should read a needle's width (roughly) below mid-range.  If it does not, the first thing to check ...   05-02-2007 06:21 am

Ignition > Starting Woes (1 reply - 3634 views)

Normally that function is handled by a set of contacts within the starter solenoid.  There should be a white-yellow wire from the solenoid that runs to ...   04-29-2007 05:26 am

Ignition > Pertronix Distributor Help!!! (47 replies - 38822 views)

Thanks, John, you're very kind.  I've made it one of my missions in life to ensure the spread of good accurate information about the JH, ...   04-28-2007 12:01 am

Ignition > Pertronix Distributor Help!!! (47 replies - 38822 views)

Firing order is 1-3-4-2.  The rotor moves COUNTER-clockwise (CCW) when viewing from dist. cap end of the distributor.  Your first photo, if correctly annotated, indicates ...   04-27-2007 10:54 pm

Ignition > Pertronix Distributor Help!!! (47 replies - 38822 views)

Didn't see a mention of coil type in any of the posts so I'll presume you are using a standard coil with the ballast resistor ...   04-27-2007 03:57 am

Carburetors > Not firing on front 2 cylinders (8 replies - 7643 views)

Joel wrote: Now, if I can just figure out why my brakes is acting funky. . .  They seem to be sticking so that they ...   04-25-2007 06:16 am

Cooling > water temp gauge and voltage stabilizer (4 replies - 8272 views)

my75jh5 wrote: At idle it will stay about half way, but driving and especially on the interstate it will climb to about 3/4 or a ...   04-25-2007 05:47 am

Carburetors > Frumpy idle (18 replies - 13232 views)

There's a set screw in the side of the vacuum valve , which needs to be slightly loose if the mixture is to be adjusted.  The directions in ...   04-23-2007 11:08 pm

Carburetors > Frumpy idle (18 replies - 13232 views)

My car has stock cams and cam timing (110 IN / 110 EX).  The vacuum retard is disabled, and the ignition timing is 12° BTDC.  That's where I get what ...   04-22-2007 06:25 pm

Carburetors > Frumpy idle (18 replies - 13232 views)

smcmanus wrote: I thought that a lift of the vacuum valve would cause the mixture to richen.  That issue has tripped a lot of folks over ...   04-22-2007 03:16 pm

Carburetors > Frumpy idle (18 replies - 13232 views)

Once warmed up, a JH engine with un-worn and properly set-up Strombergs should idle quite smoothly at 1000 rpm, and with increasing roughness down to 400 ...   04-22-2007 04:50 am

Electrical & Instruments > Which wire goes to to the temp sending unit? (7 replies - 7035 views)

The temp sensor wire runs from the terminal on the sensor to the 5-pin connector set in the engine bay.  The engine end of this connector set is ...   04-20-2007 03:34 am

Ignition > distributor rotor (3 replies - 5290 views)

Most JHs used a Lucas model 25D4 distributor, which was also used in many other British 4-cylinder cars.  Consequently, the rotor for the JH is the same ...   04-19-2007 05:11 am

Electrical & Instruments > Radio and Switch inquiry (7 replies - 7849 views)

The radio power normally comes from the AUXILIARY position of the ignition switch.  Normally this will be a white-blue wire that comes from the connector into which the ...   04-18-2007 04:44 am

Carburetors > Not firing on front 2 cylinders (8 replies - 7643 views)

Kurt may well have the right of it.  Sometimes all it takes is a virtually invisible film of moisture inside the distributor cap, particularly if the ...   04-14-2007 04:52 am

Electrical & Instruments > Ignition Switch replacement (1 reply - 3608 views)

I don't think this would work.  The MG part might perhaps fit mechanically, but it seems to lack the steering lock mechanism and release button.  Also, you'd have ...   04-05-2007 04:20 am

Body & interior stuff > Malaga Blue (3 replies - 5246 views)

From my 1974 parts book: Air drying paint: manufacturer GIP, GL 31032. Low bake paint: manufacturer GIP, LSC 31032. I don't know if these numbers are still current, or ...   03-20-2007 03:46 am

Cooling > Thermostat diameter larger than pumps recess (1 reply - 4501 views)

Haven't seen this problem in decades but it was not unheard of in the early days of foreign-made auto parts.  In any event, the short answer is yes, ...   03-18-2007 05:11 am

Body & interior stuff > Door Panels (7 replies - 7255 views)

Given the size and thickness of the door boards it would be a bit tricky to replicate them at home unless you have access to some very ...   03-14-2007 03:11 am

Carburetors > control valve : what is the proper way to set it up. (1 reply - 3831 views)

If your car has Strombergs, there's a multi-part carburetor overhaul article in the JHPS magazine (March-June 2005) that covers the gadget in question.  If those magazines aren't available, and ...   03-14-2007 02:58 am

Suspension > Steering Rack Lubrication (17 replies - 27408 views)

Thank you, Joe!  I have annotated my shop manual accordingly. ...   03-10-2007 02:31 am

Ignition > engine cranks, but won't start (6 replies - 9042 views)

For an engine to run, you need: Sufficient compression Sufficient spark, at the right time Proper fuel-air mixSince the engine was running, lack of compression is ...   03-07-2007 04:13 am


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