? engine wiring harness re-wrap & connector dis-assembly ?
 

While I did purchase a new engine wiring harness, I decided to "invest" another $100 in re-wrapping it with "extreme tape" (self-fusing silicone tape), along with strategically placed fiberglass & aluminized fiberglass sheathing and tubing.

I was able to get apart 99% of all connectors except the two connectors (4 & 2 pins) at the tranny with white-colored innards (see attached pic of the 4-pin).

Anyone know how to take these two-connectors apart ?

Once I get these two apart, aluminzed fiberglass tubing will protect the tranny wires as well !

Thanks,
:-) neil

are you planning on driving this under water. cuz this seems like a little overkill to me.

Nope, but I'll be boosting her more, so more heat . . .

Anyone know how to take apart this connector ?

:-) neil

what the heck is the point of buying a brand new harness and then unwrapping it?

I had a fairly new wiring harness, and after just 2-years of (4) 2-day track-days per year, the cheap tape and vinyl sleeves were already brittle.

In short, I want this thing to last, and since I get a Mazda Motorsports discount, I decided to re-wrap with materials that can take 600-F continuous, and 2000-F intermittent.

Where I used aluminized fiberglass tape, I followed up with either the silicone tape or the fiberglass sleeving so the tape doesn't come apart.

Regardless, I figured out how to take apart the connector.

Once you get the "white" portion past the plastic nub with a Jewler's screwdrive, you to have pull it out by applying enough pressure to opposite sides while pulling it out.

Kind of like picking up a glass cup using two finger on the INSIDE and spreading your fingers apart.

Enjoy!

:-) neil

Nice job! I may have to try and persuade you to do mine also ;).

Must be an FD thing. My FC wiring harness was pretty well insulated/taped from the factory IMO, not that time hadn't taken some toll on it though.

Awesome job on the harness... I (by I , I mean my mechanic ;)) did the same with my harness but we also used the network mesh material as an "overgarment". As for the other two plugs... My 2 cents... leave them alone and figure out another way to wrap them, the last thing you need is a jacked up "new" harness...


Tony...

nice job heat is the killer.

I would have just put additional heat shielding over the existing wires. Those connectors are a pain to de-pin.

i am getting a new harness as well for my mazda motorsports block. i think this is a must for anyone wanting their harness to last a few engines..things tend to get way to brittle

I would have done this, but I have all the emissions & rat's nest stuff, so room is tight, and wrapping over existing would make it too thick.

The stock vinyl is only good to 200-F, so I think you'd still get brittle/hard sheathing if you wrapped-over existing.

De-pinning and de-wrapping is very easy (with the proper tools), save the last two tranny connectors . . .

:-) neil

There are more than one different types of wrap on the FD harness. The one which is for the base of the harness is fine. Its the stuff that's used on the branches from the main loom which is the problem. It hardens and becomes like plastic after a while.

This is funny! A few engines...

Nice job Neil! I used a lot of thermo-tec components and different shielding from McMaster-Carr when I reloomed my LS1 harness. If you want to go crazy McMaster has some serious stuff for sale to shield wires from heat... I was impressed when I was looking through their whole catalog.

I will also say that the more advanced, and expensive, heat shielding/wire looming products do a lot to reduce the bulkyness of the harness and do much to improve its flexibility.

Props to you for de-pinning all of those connectors! That had to be a pretty big PITA!

I also re-wrapped portions of the engine power-distribution harness and thought you'd like to see the "tools" I used.

Enjoy!

:-) neil

Great job, i'll have to take this extra step when i reinstall my harness.

:icon_tup: Nice Job. I did the same thing with self-fusing silicone wrap, but to an old harness (also removed emissions connectors). The biggest pain was removing all that hard plastic mentioned above.
Did you ever have any success with the transmission connectors? If not I don't think it's a big issue. Since the loom comes down on the driver's side, pretty much opposite the exhaust, I don't think it sees alot of heat.

Yes I was able to take apart ALL tranny connectors off the engine-wiring harness, see post #5:

https://www.rx7club.com/showpost.php...61&postcount=5

:-) neil

Harness work - I love it


later