Putting in a replacement L-28

[siteunseen]

6 minutes ago, Patcon said:

Check valve lash.  You sound like you have a noisy lifter or two. I don't think its an exhaust leak...

I agree. It's a "clickity" sound not the "tangity" sound from exhaust leaking. A short piece of hose for a stethoscope would be helpful locating the source. 

Car looks great! It's been enjoyable for me reading your thread. You know what you wanted and now you have it. Well done!

[siteunseen]

Read #6 from @Diseazd

[Captain Obvious]

i'd have to hear it in person to decide if it's valve noise or just normal injector noise.

In any event, the car looks great. I'm so happy you're getting some time behind the wheel!     

[Jeff G 78]

Your car looks great!  Congrats on the progress.  I just hear normal injector tick, not exhaust leakage or valvetrain noise.

[Av8ferg]

Thanks for the tips. I have only done a cold valve adjustment so I need to get it hot and do another adjustment . The engine has less than 30 mins run time on it so I’m slowly exercising it. Yesterday the oil pressure gauge looked low to me. The scale on the gauge goes 0-90psi. The needle was sitting around 30psi. Not sure yet if this is correct. Could be the sensor which is a ZX version (2 spade connectors vs 1 bullet). I made an adaptor plug to got from bullet to spade and left on spade fitting empty. Maybe that’s the issue.


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[dutchzcarguy]

8 minutes ago, Av8ferg said:

Yesterday the oil pressure gauge looked low to me. The scale on the gauge goes 0-90psi. The needle was sitting around 30psi.

On idle the pressure seen on the meter can be very low.. It's a known problem.. 

To be sure you can always look under the oil fillercap during idle, but look out.. the oil can jump out the opening a bit.. If the camshaft is oiling good the rest is also good.

[Patcon]

If you have 30 psi at idle, I would consider that very good

[Zed Head]

Pressure should rise with RPM.  You might rev the engine and see what the needle does.  The oil pressure gauge and sensors are known for their inaccuracy on these cars.

[siteunseen]

You can run a gauge on the end of a couple feet of hose under the driver's wiper and watch what it does while you're driving.

Thank you to @FastWoman for that trick.

[Jeff G 78]

3 hours ago, siteunseen said:

Thank you to @FastWoman for that trick.

There is a name I haven't heard in a long time!

[siteunseen]

10 hours ago, Jeff G 78 said:

There is a name I haven't heard in a long time!

This was one of my first reads when I joined this forum. There's a lot of names in here I haven't seen around anymore, Z Train, Z Curves, Coyze...

 

[Racer X]

On 12/4/2021 at 5:59 AM, Av8ferg said:

Thanks for the tips. I have only done a cold valve adjustment so I need to get it hot and do another adjustment . The engine has less than 30 mins run time on it so I’m slowly exercising it. Yesterday the oil pressure gauge looked low to me. The scale on the gauge goes 0-90psi. The needle was sitting around 30psi. Not sure yet if this is correct. Could be the sensor which is a ZX version (2 spade connectors vs 1 bullet). I made an adaptor plug to got from bullet to spade and left on spade fitting empty. Maybe that’s the issue.


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Oil pressure rule of thumb is 10lbs for every 1,000 rpm. So ten pounds at idle is plenty, at 7,000 rpm 70 to 80 psi is fine.

A good quality (read Stewart Warner) mechanical gauge is best.

 

 

For the diamond pleated covering, a heat gun helps to get it formed and stretched over the irregular shapes of the tunnel and floor.