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Engine & Transmission > Reversed cams effects (10 replies - 916 views)

tonyhawker wrote: If all seems well I will put the new Gates 104 belt on and proceed with other checks.  Don't want to damage a $116 ...   10-17-2017 08:22 pm

Engine & Transmission > Reversed cams effects (10 replies - 916 views)

Tony, Before you go making changes, how about posting clear, close-up photos of the present pulleys. Clean them so that any markings stamped on ...   10-15-2017 01:51 am

Engine & Transmission > oil pan (11 replies - 5330 views)

I don't 'know' this is what your drain plug is, but... There are aftermarket drain plugs that look much like an old-school Thermos bottle stopper. ...   09-30-2017 03:52 am

Engine & Transmission > Differential Oil-GL-1, GL-4 or GL-5? (10 replies - 467 views)

Steve Duncan wrote: Thanks for the information. Just so I'm clear,there are no "yellow metals" in the differential? All the shims are steel?The Jensen-Healey rear axles ...   09-28-2017 10:37 pm

Engine & Transmission > Differential Oil-GL-1, GL-4 or GL-5? (10 replies - 467 views)

Use a GL-5. It's specifically formulated for use with hypoid gears, such as those used in the final drive's crown wheel & pinion. ...   09-27-2017 10:12 pm

Brakes > JH BRAKE DRUMS (5 replies - 1770 views)

t4brew wrote: My guess is that they are only needed to keep the drum from moving around until the wheel and lug nuts are torqued on. ...   09-27-2017 09:30 pm

Miscellaneous > Where can I find original Passenger side courtesy light? (3 replies - 243 views)

NigelK wrote: They come up on eBay in Australia rarely and for extortionate prices.Yipes... AU$475 on eBay Oz!! That is a little on the ...   09-24-2017 08:54 pm

Engine & Transmission > Reversed cams effects (10 replies - 916 views)

A full 4-stroke cycle involves two full revolutions of the crankshaft. If the crank is at TDC, and the cam pulley timing marks ...   09-14-2017 05:52 am

Engine & Transmission > Reversed cams effects (10 replies - 916 views)

tonyhawker wrote: Offhand, are the valves specific to only the 907 engine and made of unobtanium or are there more generic replacements available?  I have the ...   09-13-2017 01:27 am

Engine & Transmission > Reversed cams effects (10 replies - 916 views)

If you have read my previous post already, read it again. What made sense in the wee hours of the morning read a ...   09-11-2017 08:21 am

Engine & Transmission > Reversed cams effects (10 replies - 916 views)

As Don mentioned, the stock cams are identical. Even the cam carriers can be interchanged between the intake and exhaust sides of the ...   09-11-2017 07:28 am

Brakes > Pressure Differential Warning Actuator (8 replies - 683 views)

Dick Fickey wrote: Thanks for the help Tim. Will follow your instructions when I bleed the brakes. Just got the rebuilt PDWA but I have ...   08-30-2017 04:12 am

Brakes > Pressure Differential Warning Actuator (8 replies - 683 views)

Dick, When you open one hydraulic circuit to bleed it, the PDWA's internal shuttle/ piston will move off to one side, closing the switch contacts in ...   08-30-2017 03:44 am

Cooling > Water Temperature Gauge Calibration (19 replies - 1397 views)

The JPEG compares the later Lotus 907 impeller with backward curved vanes (on the right), with the 910 impeller with the full-length, backward curved vanes. ...   08-23-2017 12:42 am

Cooling > Water Temperature Gauge Calibration (19 replies - 1397 views)

DonBurns wrote: Thanks. Are 910 water pumps something that are available without a rebuildable 910 core?Sorry about being so slow getting back to you. It really helps ...   08-22-2017 03:35 pm

Cooling > Water Temperature Gauge Calibration (19 replies - 1397 views)

The engine needs to come up to normal operating temperture to run right, and to prevent moisture condensation build-up inside the engine. There ...   08-17-2017 08:08 pm

Engine & Transmission > Lotus 5 speed transmission (31 replies - 9695 views)

Interesting. How much does the W58's shifter need to be modified to fit properly in the JH? Is the excessive mfg ...   07-24-2017 09:19 pm

Engine & Transmission > Jensen Healey Specific - Eccentric Tensioner Hub (46 replies - 7211 views)

Rick, One of the blue belt's advantages is it's exceptional stability. Continue to check it's tension on a regular maintenance schedule, but once it's ...   07-24-2017 09:03 pm

Engine & Transmission > Jensen Healey Specific - Eccentric Tensioner Hub (46 replies - 7211 views)

Rick, What tension were you trying to achieve with your blue belt? Regards, Tim Engel ...   07-24-2017 06:37 am

Engine & Transmission > 907 Main Bearing Shells - Conversion to Run Chrysler 318 V8 Shells (7 replies - 701 views)

Joachim, I've not talked with either of them myself. However, this subject started over on the LotusExcel forum, and the fellow needing the bearing ...   07-22-2017 03:49 am

Engine & Transmission > Auxiliary housing shaft circlip (4 replies - 449 views)

Apply the Loctite to the pulley bore. Maybe just a very little bit on the shaft, wiping most of it back off... ...   07-21-2017 09:28 pm

Engine & Transmission > Auxiliary housing shaft circlip (4 replies - 449 views)

Jim, The Auxiliary pulley is to be mounted with Loctite, and it should require the heat of a propane or MAPP gas torch to remove it. ...   07-21-2017 06:50 pm

Engine & Transmission > 907 Main Bearing Shells - Conversion to Run Chrysler 318 V8 Shells (7 replies - 701 views)

Here's a few dimensional data-points for starters. Crankshaft Main Bearing Journals: CHRYSLER 318 V8 ................................. LOTUS 9XX Engines 2.4995 - 2.5005" -- Journal Dia ............... ...   07-21-2017 05:11 pm

Engine & Transmission > 907 Main Bearing Shells - Conversion to Run Chrysler 318 V8 Shells (7 replies - 701 views)

Thanks for the lead... I'll check it out. Edit -- A friend who subscribes tGT40s.com is attempting to ping Ron for me; but to date, ...   07-21-2017 04:12 am

Engine & Transmission > 907 Main Bearing Shells - Conversion to Run Chrysler 318 V8 Shells (7 replies - 701 views)

I'm not sure, but I believe Ron Earp was one of those who converted to Chrysler bearings. Is Ron still on this forum? ...   07-20-2017 06:05 pm

Engine & Transmission > 907 Main Bearing Shells - Conversion to Run Chrysler 318 V8 Shells (7 replies - 701 views)

Many years ago, comments on this forum by JH racers who converted the 907 engine to run Chrysler 318 V8 main bearing shells. ...   07-20-2017 05:44 pm

Electrical & Instruments > Related or coincidence? (7 replies - 670 views)

Pacer Technologies is known for their line of ZAP super glues, but they also make Rail Zip II. Electric model train guys use ...   07-18-2017 07:32 pm

Engine & Transmission > Lotus 5 speed transmission (31 replies - 9695 views)

Hi John, It'd be great if you would burn a copy for me. You're the one doing all the travelling, so when you're home ...   07-06-2017 05:48 am

Engine & Transmission > Lotus 5 speed transmission (31 replies - 9695 views)

Dan, Is that the article written by Ernie West of Dead Lake Motors? If so, I'd like to get my hands on a copy ...   07-03-2017 12:25 am

Engine & Transmission > Oil Pressure too high (23 replies - 4659 views)

scottsmi wrote: On the subject of oil, I read your previous post on the viscosity and wonder what your opinion is of using zddp. I ...   06-21-2017 08:21 pm

Engine & Transmission > Oil Pressure too high (23 replies - 4659 views)

scottsmi wrote: Thanks Tim, I am interested in the extra document. I want to keep my JH as original as possible but dont like the oil ...   06-21-2017 06:44 pm

Engine & Transmission > Oil Pressure too high (23 replies - 4659 views)

The following is probably more than you want to know, but... Over the years, Lotus had three oil filters for the 9XX 4-cylinder. All ...   06-19-2017 05:47 am

Engine & Transmission > Oil Pressure too high (23 replies - 4659 views)

Did you replace the seal between the oil cooler sandwich plate and the auxiliary housing? It tends to get over-looked. Regards, Tim Engel ...   06-16-2017 07:10 am

Engine & Transmission > Oil Pressure too high (23 replies - 4659 views)

Please excuse the redundancy, but I just posted this photo in another thread on this same general subject. All the parts together make ...   06-15-2017 01:12 am

Engine & Transmission > Oil pump rebuild (46 replies - 23066 views)

For 'slow' oil pressure build-up on cold start, make certain this air bleed hole is clean, and not plugged with sludge. ...   06-15-2017 12:38 am

Engine & Transmission > Oil pump rebuild (46 replies - 23066 views)

And another view, with the parts nested together. ...   06-15-2017 12:34 am

Engine & Transmission > Oil pump rebuild (46 replies - 23066 views)

Here are the pressure relief valve's internal parts laid out. It's not my photo, but I don't recall where I got it. ...   06-15-2017 12:28 am

Engine & Transmission > Oil pump rebuild (46 replies - 23066 views)

See the attached JPEG clipping from the JH Parts Manual. On the back end of the oil pump housing, next to the bore where the distributor ...   06-15-2017 12:22 am

Engine & Transmission > Lotus 5 speed transmission (31 replies - 9695 views)

Just for the record, Lotus used three different 5-speed transmissions with the 907 & 912 engines. Any of which, when taken with it's ...   06-05-2017 06:13 pm

Projects > 19064 - autocross project car for SCCA's FSP class (42 replies - 12191 views)

I'm surprised fuel injection is such an open option. How are your cam's timed. The early J-H timing was 115 IN / 115 EX, ...   04-28-2017 05:03 pm


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