Brett Gibson JH5 20497 wrote: (Snip)... cut the belt on the engine in half, length wise, then slide the new belt onto the pulleys (Snip)...dwalls1 wrote: (Snip)... ...   10-14-2016 01:30 am

qwerty wrote: Just checked the back of the cam gears and there's a black mark.... ....JUUUUUUST KIDDDING!! Keep that up and we'll make you go sit in ...   10-12-2016 08:00 am

Tim Murphy wrote: Hopefully, I will then keep quiet and let the other, more knowledgeable guys offer help :<)Discussion is good, don't go silent on us. Regards, Tim ...   10-12-2016 07:55 am

Tim Murphy wrote: (Snip)... With the engine running at 1k (25D Distributor), check the ignition timing at the crank pully, it is usually set around 8 ...   10-11-2016 04:53 am

qwerty wrote: I will be taking the cam covers off later this week or on the weekend. I will look for markings.The cam's ID marks are ...   10-10-2016 07:46 pm

qwerty wrote: Thinking out loud here, Could this be the end result of the Aux pulley being out by 1 or more teeth and correcting for ...   10-10-2016 07:38 pm

qwerty wrote: (Snip)... Maybe it does have non standard cams, as yet i do not know. Maybe it's to let the DHLA 45's breathe.Remove a cam ...   10-10-2016 07:24 pm

subwoofer wrote: You have both cams installed with Red Dot (110MOP) as the valid timing mark, but if I am not much mistaken they have been ...   10-10-2016 07:07 pm

qwerty wrote: Tim wrote: > If the cams are stock, and the pulleys are 110/100 (97), > then the best cam timing to use is 110 IN ...   10-10-2016 06:56 pm

qwerty wrote: (Snip)... I doubt is has a different Cam but i will check ...how do i check? On the stock, OEM cams, there were marks on ...   10-10-2016 06:52 pm

JHPS allows file attachments up to 102kb, and your drawing is only 17kb. Do you have a higher resolution version that you could ...   10-10-2016 06:30 am

The second file, the camshaft drawing, is pretty illegible. I've reversed the color bias so that it has a white background, but the ...   10-10-2016 05:57 am

Brett Gibson JH5 20497 wrote: You can buy the bearing for $13.10 and the seal for $10.80 from JAE and do it yourself, they even have ...   08-01-2016 02:43 am

Brett Gibson JH5 20497 wrote: (Snip)... A new impeller cost about $40 but most of the time you can re-use your old one, or better yet ...   08-01-2016 01:43 am

907 Oil Pressure Specs Jensen-Healey at normal operating temp (hot) 60 psi (4.2 kg/ sq cm) at 2500 rpm J-H's 60 psi oil pressure spec is possible, but ...   08-01-2016 01:23 am

I'm late to this thread, sorry if I'm beating a dead horse. Westsideclay, Subwoofer and Brett have given you good advice on how to time ...   05-10-2016 07:59 am

Frank, Jensen-Healy 'assembled' eccentric tensioner Industry Standard ball bearings, such as ... INA 6005-2RS ID .............. 0.9843" (25mm) OD ............. 1.8504" (47 mm) Thickness: ... 0.4724" (12 mm) Two ...   05-05-2016 03:29 pm

Every Spring in the Twin Cities, Minnesota, there's a mixed-Marque, vintage-foreign car show called the Spring Kick-Off Car Show. It's 'all foreign', but ...   05-04-2016 04:14 pm

The windshield wiper gearmotor has some ID marks stamped on the gearbox cover (not on the motor). It should be something like: 75720A PARK ...   03-29-2016 09:13 pm

I know, I'm very late, but I just ran across this thread. Maybe this will be of use to the next guy.Bfitz241 wrote: The ...   02-21-2016 12:49 am

I've harvested the following from somewhere on the Internet, and cannot verify it's accuracy. Use at your own risk. Jensen Healey Wheels. 13 x 5.5 ...   02-21-2016 12:03 am

NigelK wrote: OK so the red / white ignition wire should be attached to the diagonally mounted spade terminal NOT to the smaller spade terminal marked ...   02-07-2016 06:44 am

Steve, Nice looking diff, but... have you ever autocrossed a lightweight car with a limited slip differential? 1) Limited slip under power will tend to ...   02-07-2016 06:10 am

Matthew Cooper (Matt) at Eurocarb Ltd is a great tech resource for Dellortos (and Webers). He knows it all, and is willing to ...   12-01-2015 06:12 pm

Koit, If you were talking about a Lotus 907/ 912 engine, there's enough Dellorto history with those engines, both Jensen-Healey and Lotus versions, that we could ...   12-01-2015 04:52 pm

Carbs require a little black art to tune them. They are not ECU controlled with sensors and feedback loops, so it's not a ...   11-28-2015 04:33 am

In the engine's stock configuration, at what rpm did peak power occur? Regards, Tim Engel ...   11-28-2015 12:29 am

Exhaust Manifold Gasket (between exhaust manifold flange & cylinder head) Original thru 1985 Steel-Asbestos-Steel Sandwich: A907E0004Z = JH 97263 - Martin Robey JH Parts Manual A907E0004ZC - 907 thru ...   11-27-2015 11:52 pm

While I'm on a roll, here's one more thing... The original steel-asbestos-steel exhaust gasket blows too easily (the ones between the exhaust manifold flange and the ...   11-27-2015 09:00 pm

Steve, The current head gasket is the Goetze composite gasket (or JAE sells their own aftermarket clone). It requires the use of either Lotus' ...   11-27-2015 08:41 pm

Steve, The number cast into a Lotus part is the raw casting number, not the finished part as used on the engine, or that you could ...   11-27-2015 07:25 pm

Jim, Is the latest file available somewhere? Regards, Tim Engel ...   11-19-2015 05:43 pm

stevegarnjobst wrote: Not sure that conversion is allowable under the SCCA rules. If it were, is the update worthwhile?Yes. The round-tooth HTD timing ...   11-18-2015 04:59 pm

stevegarnjobst wrote: Were all the stock tappets cast iron?ALL 907s were originally built with chilled cast iron tappets. When Lotus made the change to ...   11-18-2015 04:47 pm

Steve, I just edited Post #19 to add a cylinder head torque spec. If it wasn't there when you read it, go read it ...   11-18-2015 03:33 pm

The current composite cylinder head gasket's crushed thickness is 0.020" thicker than the old steel-asbestos-steel gasket's. That lifts the head 0.020" higher off ...   11-18-2015 03:19 pm

Steve, The very early 907 Mk I intake ports were 24.5 mm tall. Later, they were increased to 25.5 mm as a running change. ...   11-18-2015 03:10 pm

Jay wrote: Would anyone have a suggestion on where I could find a workshop manual for the 1974 Lotus 907 engine? I would love to read ...   11-17-2015 10:04 pm

That could be cool. I've talked with Mike, but have never met him in person. He's a good guy, and seriously into ...   11-17-2015 09:45 pm

Carl, Vent Pipe: It's used in the 2.0 907 in the Elite, Eclat & Esprit. It is not in the 2.2 912 or 910 Lotus hasn't made new ...   11-17-2015 04:59 am