The 15 Y/O Turbo M42 Build Thread (Now Holley EFI Terminator X Controlled)

[Dj Buttchug]

Current status of engine.

Finished oil line version two.

[econti]

Nice, might steal that idea for mine. What size fitting down the bottom?
And where's your feed from, that unused bolt at the back?

[Dj Buttchug]

Nice, might steal that idea for mine. What size fitting down the bottom?
And where's your feed from, that unused bolt at the back?

Yes. The rear port at the back of the head is best for the oil feed imo. -10 bung on the upper pan with a 90 swivel. Its better this way incase the lower pan gets damaged.

[av8drvr]

Would you mind sharing your cylinder head install detail step - by step? I pulled my M42 and removed the head chasing the profile gasket leak and prior to reinstall want to give myself the best shot at not screwing up the steps. It looks like you went through a dry fit (shop towels under head picture). Do you have any words of wisdom? There is not a ton of info out there for getting the head/profile/timing case sequence just right. Thanks.

[Dj Buttchug]

Would you mind sharing your cylinder head install detail step - by step? I pulled my M42 and removed the head chasing the profile gasket leak and prior to reinstall want to give myself the best shot at not screwing up the steps. It looks like you went through a dry fit (shop towels under head picture). Do you have any words of wisdom? There is not a ton of info out there for getting the head/profile/timing case sequence just right. Thanks.

Profile gaskets are a pain to get sealed correctly. You need to apply pressure to the upper outer timing case downward when installing. Step 1 would be to order Form A aviation gasket sealer off amazon. Then when it comes time for re-assembly use the valve cover to force the outer upper timing case down so the top surface (where the VC gasket goes) is completely flush. If you look closely at your upper timing cover you can see the factory bolt holes are oval shaped. This is done on purpose. Install the bolts loose then tighten the valve cover down so pressure is applied. Once the upper timing cover is seated you can torque it down.


This is the only way I have been successful at getting the timing case sealed up. Also do not forget the most important part. Form A aviation sealant.

[av8drvr]

Thanks! quick clarification, are you using the form-a-gasket on the profile gasket connection or the paper gaskets between timing case and block? My plan was RTV where the profile splits and form-a-gasket on the paper.

[econti]

I use it on every gasket surface, its the only way I've found to make my vehicles not leak. For M42 specific, don't bother with the cheap China gaskets, make sure its OEM manufacturer if not from BMW themselves.

[Dj Buttchug]

Form A everything. including rubber profile gaskets.

[av8drvr]

thank you both!

[Dj Buttchug]

Ok, engine back in.

[Dj Buttchug]

Been back on the road for the last week or so. Form A doing wonders keeping the pesky oil leaks away.

About 250 miles driven on new rebuild. Currently set at 1 Bar. Will put it back to 17ish after 1st oil change.