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300 postsShowing posts 161-200 of 300

Projects > 19064 - autocross project car for SCCA's FSP class (42 replies - 13396 views)

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 05:47 pm

Projects > 19064 - autocross project car for SCCA's FSP class (42 replies - 13396 views)

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 04:33 pm

Projects > 19064 - autocross project car for SCCA's FSP class (42 replies - 13396 views)

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 04:19 pm

Projects > 19064 - autocross project car for SCCA's FSP class (42 replies - 13396 views)

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 04:10 pm

Engine & Transmission > removing cylinder head (10 replies - 5337 views)

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 11:04 pm

Carburetors > Pierce intake manifold for Weber/Dellorto? (3 replies - 2261 views)

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 10:45 pm

Engine & Transmission > Internal Oil Breather Pipe (3 replies - 1914 views)

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 05:59 am

Engine & Transmission > Crankshaft (12 replies - 10340 views)

Don, I've got 4 new ones, measured them with a micrometer, and got an average of 0.0925" (2.35mm) Lotus = Standard, +0.0025, +0.0050, +0.0075, +0.0100 JAE stocks ...   11-17-2015 04:44 am

Carburetors > Pierce intake manifold for Weber/Dellorto? (3 replies - 2261 views)

Steve, The manifolds (5 available) being offered by Pierce are original NOS parts, not reproductions. The only thing is that, from the photos posted, ...   11-17-2015 04:28 am

Engine & Transmission > Fastner Sizes - Nuts & Bolts (4 replies - 2041 views)

Go to my Dropbox account here: https://www.dropbox.com/sh/4kxqw9vlsnz54lf/AACCyvB-TfYKLI1qM-e_IUlTa?dl=0 In a sub-folder titled "Jensen-Healey Parts & Tech", you'll find an Excel file: Hardware - JH Nuts & Bolts by Jim ...   11-02-2015 02:20 am

Engine & Transmission > Differences between MkII engine and GT engine? (16 replies - 6078 views)

t4brew wrote: If the GT 907 engine you are looking at still has the air rail you may need to find plugs for the air injection ...   09-17-2015 06:45 am

Engine & Transmission > Timing Belt Noise (6 replies - 2770 views)

Are the pulleys worn such that the belt is running against a stepped edge? Worn pulleys should be replaced. Regards, Tim Engel ...   09-02-2015 09:21 pm

Engine & Transmission > Timing Belt Noise (6 replies - 2770 views)

Bogie07 wrote: After sitting for a couple months, I started my car up and drove it for a while. It ran fine, but once it was ...   09-02-2015 09:18 pm

Carburetors > DHLA 45s possibly boiling? (21 replies - 10212 views)

The first step to a good carb tune-up is to give the ignition a good tune-up, so don't give up on that. ...   06-21-2015 06:19 am

Carburetors > DHLA 45s possibly boiling? (21 replies - 10212 views)

These Jenvey twin, long throttle bodies mimic the DHLA / DCOE size and footprint. http://www.jenvey.co.uk/images/stories/virtuemart/product/tb45_d.pdf Quoting: "The TB body is designed with major dimensions identical to twin horizontal ...   06-21-2015 05:59 am

Carburetors > DHLA 45s possibly boiling? (21 replies - 10212 views)

subwoofer wrote: 3. Stale fuel. Fuel is from last year, but it did the same thing last year when the fuel was fresh. Also, expected outcome ...   06-17-2015 09:01 pm

Carburetors > DHLA 45s possibly boiling? (21 replies - 10212 views)

gmgiltd wrote: I understand he is working on a system to go inside DHLA's so it might be worth a call.I've also seen fuel injection systems ...   06-17-2015 08:27 pm

Carburetors > DHLA 45s possibly boiling? (21 replies - 10212 views)

Joachim, Are your Dellortos stock Jensen-Healey spec? And are they emissions or non-emissions? What is the elevation above sea level where you ...   06-17-2015 08:25 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

I lied, I do have a liner handy and it's OD at the step/ seat is: 4.294" (109 mm). So a liner shim would need to be ...   04-27-2015 10:33 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

I don't recall any liner shims, but then there were a few J-H parts that never made it to the Lotus world. But ...   04-27-2015 09:32 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

New liners need to be fitted to the block as required to produce the correct 'nip'... the liner's exposure above the block deck. ...   04-26-2015 06:20 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol, The liner bore is to be measured at 50mm down from top, across the thrust axis Grade A = 3.7510 - 3.7515" (95.275 ...   04-26-2015 05:24 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

The rings should not be gapped to a 'minimum', and there's such a thing as too tight. Each type of ring will have ...   04-25-2015 05:12 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Kim, 'What you describe' indicates the rings are the cause of your smoke problem. If you disassemble the engine again, then take advantage of the opportunity to ...   04-25-2015 04:52 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: (Snip)... I got the below tolerances measured in 1/100 mm and they all looks to be more than double of the max allowed 4,5 ...   04-06-2015 04:02 am

Wheels > Motor oil viscosoity (12 replies - 7103 views)

rday wrote: Thanks All,    Your comment on a lighter viscosity oil affecting engine temperature makes me wonder if this is why the engine runs hot.  Around ...   03-31-2015 02:53 am

Engine & Transmission > Exhaust Header Removal and Cam Covers (15 replies - 6506 views)

Loosening the left engine mount, and jacking up the left side of the engine will both raise the engine, and rotate it to the right ...   03-30-2015 08:07 pm

Engine & Transmission > Exhaust Header Removal and Cam Covers (15 replies - 6506 views)

The original steel-asbestos-steel gasket between the header and the head aren't bad, but they do tend to blow over time. The exhaust manifold ...   03-30-2015 07:54 pm

Wheels > Motor oil viscosoity (12 replies - 7103 views)

Oil viscosities are ranges, not values (SAE 50 = 900-1300 Saybolt Universal Seconds at 100 F). It's possible for one 50wt oil to ...   03-30-2015 07:32 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: (Snip)... Using a dealer gauge shows me a clearance of 0,75 mm between the liner and the piston again with the piston in the ...   03-29-2015 11:11 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Illustrations end up pretty lo-res by the time they're uploaded to JHPS. You can download clearer versions from my Dropbox account, here: https://www.dropbox.com/sh/kwl3ckub3in3wrm/AAA3CRJImDKvpslh-ySyQ_sza?dl=0 They're not ...   03-23-2015 10:49 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Review message #21. I've substituted a different JPEG attachment which illustrates a typical T-belt snubber (Aux Pulley location), the short spacers used with ...   03-23-2015 10:27 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Notice the front main seal housing on the left is for use with the early eccentric tensioner, and is similar to the J-H unit. The later ...   03-23-2015 08:21 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Here's an illustration showing the A/C compressor mounting brackets. Note the two welded-in bosses surrounding the bolt holes in the upper right of ...   03-23-2015 06:21 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: (Snip)... I have a semi automatic tightener but I cannot find out how to mount it. It looks like I am missing threaded ...   03-22-2015 11:15 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: (Snip)... I need to sort an issue with the belt tightening wheel . The bolt is pulling a little to the left when I ...   03-22-2015 10:48 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: If I pull the engine out again and need to install my old engine I need to sort an issue with the belt tightening ...   03-22-2015 09:48 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Barthol wrote: I have no idea on how the bottom end is built. It was done from the Guy in Uk from who I bought ...   03-22-2015 09:40 pm

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

Good, they're more fun above 4500 rpm anyway. The 104/107 cam combination is the same as was used in the 912 HC. I've not ...   03-22-2015 07:01 am

Engine & Transmission > renovated engine burning oil (46 replies - 16371 views)

The 907 is not supposed to have valve guide seals. The engine is designed for high rpm operation, and that requires adequate lubrication ...   03-22-2015 06:43 am


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