SteveJ

Just for reference, the part number is 28820-N3300. Part #44 here: https://www.carpartsmanual.com/datsun/Z-1969-1978/electrical/electric-unit-switch/section-1/240z-260z

They change the names but #9, Intermittent wiper relay, and #1, Interval wiper amplifier, are one and the same. I hope this clears up your confusion.

Well, on the flip-side, they aren't publishing a bunch of articles with bad information. I hear enough wrong information about the Zs at car shows to keep @HS30-H busy with his voodoo dolls all day long. Many times, I reply with, "No, that isn't true," or "That is in the realm of urban legend." On more than one occasion, I have heard that Nissan bought Datsun because Datsun went bankrupt. As for Hagerty, what comes to mind is the last line from Chinatown. "Forget it, Jake. It's Chinatown."

Could you put the two diagrams into a new reply? I'm not seeing what you're seeing.

I can guarantee going home in reverse was not an option for me. Just listen to the video. There's actually only one clunk in first. I let the car die after the clunk. At least I have the replacement box on hand (280Z 5-speed). I'll probably start on the teardown on Saturday. I'm trying to coordinate with someone I know to make a housecall on Sunday to put the 5-speed in. clunks.mp4

If you're really worried, search for closed cell foam. https://www.amazon.com/Trisiki-Insulation-Automotive-Conditioner-Protective/dp/B091GNCK1G

If it blocks wind from coming into my house, it probably will stop exhaust from sneaking past your taillights.

Lowes & Home Depot. https://www.homedepot.com/s/self adhesive weather strip?NCNI-5 https://www.lowes.com/search?searchTerm=adhesive+foam+weatherstripping+for+doors

Same thing

I was able to confirm yesterday that the intermittent relay does handle the park function for the wipers.

Octane boost fouls plugs. I had someone come over for a tune-up. I pulled a plug, and asked, "Do you run octane booster?" He was surprised I knew, but the plugs ratted him out. Example: Image shamelessly stolen from https://www.e90post.com/forums/showthread.php?t=1162289&page=2 Stabil is a fuel stabilizer and doesn't foul plugs AFAIK.

The initial test looked like a scene from a Cheech & Chong movie. Dave? Dave's not here. No, it's me, Dave. I've got the stuff.

The ground doesn't pass through the relay either. That's another lie by that diagram. Over the years we have noticed several errors in various Z wiring diagrams. @Matthew Abate found many in the 73 diagram when he went to rebuild his harnesses. By the way, Matthew, I'd LOVE to see your car when it's done. Too bad you live in the land of ice & snow. You may want to look for threads on parking the Honda wiper motor because you may need that with the VAG relay.

I think if you removed the relay, you only lose the intermittent function, and Park may be affected. I haven't tested to confirm. While it shows 12VDC+ going through the relay, that diagram lies!

I was wondering when someone was going to mention that stuff. https://www.amazon.com/dp/B07CTQ67X9

If you got only 8 ounces of fluid from the differential, that was not overfilled. That was underfilled. Underfilling the differential can cause overheating, damaging bearings and gears. You should use GL-5 gear oil to refill. You did not say which differential you have, but here are the capacities from the service manual GI section. The 1.3 and 1.0 are in liters (or litres for our UK & Canadian friends).

This may or may not help you. I added the wire colors to the diagram. In OFF, YB is connected to LY from terminal 3. LY from terminal 3 is always connected to the M terminal on the Wiper Relay as part of the Park circuit. In INT, YG is grounded, and YB is connected to LY from terminal 3 (to Park after the wipe). In LOW, YG is grounded, and YB is grounded. In HIGH, YG is grounded, and LY for the H connection on the wiper motor is grounded.

In a nutshell, the switch grounds leads from the relay. I'm not sure what diagram you're looking at, so it's difficult to provide clarification. Considering the stock switch only has 4 detents (Off, intermittent, low, high), I'm not sure how you're going to modify the switch to get the variable intermittent function from the VAG relay.

Try https://www.pure-gas.org/

Did you lubricate the wiper linkage? I did that on my 260Z a long time ago, and I found the performance adequate for a heavy rain when I was driving up to ZCON in 2020.

Dang, you must be running pretty good compression. You could try this website: https://www.sunocoracefuels.com/fuel-finder There's a station near me that has a pump with 110 for "off-road use only". It's nice living not too far from a couple of tracks.

Did you have the parking brake engaged? They can stick. Been there. Done that. Got the t-shirt. I had to push the car pretty good to break the brakes loose.

Look at this thread: Keep the Nissan relay. I think I have it decoded on how to use a later Nissan relay, but I haven't purchased the relay to verify, yet.

Stock motor with stock compression - go with 87 or choose 91 if you like to burn money for no gain. If you have higher compression, go with 91.

It doesn't show up in a Google search for the site. Your thread does, though.