Saving a 906

[Gary De]

Henry, that is pure art work!!!! It apears that the top of the piston has a coating along with the skirt area. The skirt looks black. Are you using some type of dry film lube on the skirt and a thermal barrier on the top?

[KTL]

Pretty stuff! Thanks for sharing how you check piston & deck clearance with the red clay.

Also notice the thermostat blockoff RSR piece. That means this engine will be running an oil filter console, or will the oil cooler simply be flowing at all times?

I like how the small displacement engines have so much "meat" around the piston bores. The larger displacement engines have always bugged me with how close are the head stud holes to the piston bore OD.

[daepp]

Excuse my ignorance, but is this actually going into a 906?

Beautiful engine BTW!

[Henry Schmidt]

Sometimes fine tuning is required

[Henry Schmidt]

[Henry Schmidt]

Originally Posted by DAEpperson

Excuse my ignorance, but is this actually going into a 906?

Beautiful engine BTW!

Hi Dave
Yes sir, 906 0022

[KTL]

Originally Posted by Henry Schmidt

There's my answer. Factory Porsche multi-screen filter console.

[Henry Schmidt]

Originally Posted by Gary De

Henry, that is pure art work!!!! It apears that the top of the piston has a coating along with the skirt area. The skirt looks black. Are you using some type of dry film lube on the skirt and a thermal barrier on the top?

The pistons are coated with a thermal barrier and dry film lubricant. We also coat the bearings and rocker pads as well as the cam lobes.
The valve stems are also coated with dry Moly.

[Henry Schmidt]

We also did the trans:

[LJ851]

Originally Posted by Henry Schmidt

Henry, what coating/plating are you using on the mag parts? Looks really nice.

[Henry Schmidt]

The coating is a Dow product that was contracted by the shop doing the body restoration. Sorry I can't be more helpful.

[tadd]

Henry,
One more question if I may please.... Lash caps. Did you reuse what was there or did you need to replace them? If you did change them, might you share where you got them?

I will be needing to do this process myself soon.

Make that two questions...Were the tensioners for authenticity? In other words why not use solids given it's going into a 'real' car that will see maintenance respectful of use.

tadd

[Henry Schmidt]

Originally Posted by tadd

Henry,
One more question if I may please.... Lash caps. Did you reuse what was there or did you need to replace them? If you did change them, might you share where you got them?

I will be needing to do this process myself soon.

Make that two questions...Were the tensioners for authenticity? In other words why not use solids given it's going into a 'real' car that will see maintenance respectful of use.

tadd

We were fortunate enough to source NOS valves so we needed to adjust every valve. We used what we had by dancing them around and hand lapping for precise measurements. That left us needing 4 specific sizes. With those numbers in hand we just ordered the sizes we needed from Porsche Motorsport.

We used hydraulic tensioners because they work well under these circumstances: occupational racing and short runs without warm up. IE: "check out how cool my 906 sounds".

[daepp]

I should probably know this, but do you test run your motors before they go back out? IF so, you REALLY need to record that sound!

[Henry Schmidt]

Originally Posted by DAEpperson

I should probably know this, but do you test run your motors before they go back out? IF so, you REALLY need to record that sound!

Engines shipped from my shop re ship dry and untested unless the customer requests a dyno test.
In this case, his race mechanic will tune the engine.

[Zitzit]

Hello!

is there any chance to have a picture of the center lube cam to chain housing seals. They are known to be unobtanium and never saw one...

Another question, hos did you do to "replicate" the 906 crank? is that something you are able to make on order? if yes, would you send me details by PM?

Thanks a lot!

olivier.

[dinobx]

Hello Henry,

Absolutely beautiful work you're doing. Quick question. I thought we were all supposed to use a five or six arm engine yolk to hold the engine on the stand. Yours is just four arm. Any insight?

Thanks.

Dino

[YTNUKLR]

Is there anything special to the 906 trans? It looks different from a 901 outside, but the gear stack looks the same. Is that a one-piece bearing retainer? In 1966?

[chris_seven]

Great picture - reminds me of a similar photograph in a very early Honda CB72 manual in a chapter titled 'How to Demolish the Engine'

[fanaudical]

Beautiful work! Thank you for sharing.