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duffymahoney

Duffy's 1/71 Series 1 240z build

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So I bought used calipers and had them rebuilt and powder coated professionally.  Well my right front caliper wouldn't stop leaking, so I decided to take it apart.  Turns out they had used a helicoil to repair some threads without telling me.  It wasn't seated correctly, which caused the brake line to leak. The company claims it to be a normal repair, but what else did they half repair or fix?   I honestly I don't want anything repaired or half repaired in my brakes system.  So I searched for another powder coated version or zinc.  Which I found, http://www.centricparts.com/products/calipers posi quiet loaded centrics calipers.They are gorgeous and pretty affordable.  Summit and rockauto carry these.  Any centric brake caliper with 142 as the starting 3 digits is this repaired this way.   The toyota S12+8 non wide versions are 142.44011 and 142.44012.  I am very happy with the quality. But one did come damaged:( I ordered the maxima rears but they are back ordered.  

 

Here is the info, basically as brand new as they could be.  

Posi Quiet Loaded Calipers
Posi Quiet loaded calipers are a full line of original equipment replacement brake calipers providing unmatched quality and value. These loaded calipers feature application specific Posi Quiet brake pads already installed.

When installing Posi Quiet loaded calipers, technicians can be assured that they are getting top quality products that have been engineered to meet or exceed the function of the original part. Each component is specifically designed for each application and the attention to detail throughout the manufacturing and testing process ensures each caliper will perform to the exacting standards of today’s vehicles. 

Each Posi Quiet caliper is finished in the same way as the original from the factory; Posi Quiet calipers feature a Zinc Dichromate finish, or O.E. colored powder coating depending on the application. This feature ensures that the caliper will look as good as it works throughout its lifetime. Ask for Posi Quiet 142 series replacement brake calipers.Posi Quiet Friction
Every Posi Quiet loaded caliper comes complete with application specific Posi Quiet brake friction. For more information on Posi Quiet brake pads go here. All new pistons
Every Posi Quiet brake caliper piston phenolic or steel is replaced to guarantee proper performance throughout the lifetime of the caliper.
  New Hardware
Posi Quiet calipers have all new hardware installed. All guide bolts, pins, through bolts and seals are replaced guaranteeing the caliper will function correctly.
  New Boots and Seals
Posi Quiet calipers come complete with all new dust seals, O-rings and boots.
  Less Noise
Posi Quiet calipers utilize the new Quiet Clips™ style abutment clips. These quiet clips ensure proper pad fitment and reduced vibration related noise under braking.
 To learn more about the Centric Parts caliper rebuilding process click here.

 

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Oh how I hate rebuilt components that I did not do myself.

That helicoil should not be in the sealing path for brake fluid. The seal should be made at the beveled surface inside. Assuming, of course, that the helicoil is installed straight and square to the seal, and is actually the correct metric thread for the application..... No guarantees on any of that!  LOL   I hate rebuilds!!

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11 hours ago, Captain Obvious said:

Oh how I hate rebuilt components that I did not do myself.

That helicoil should not be in the sealing path for brake fluid. The seal should be made at the beveled surface inside. Assuming, of course, that the helicoil is installed straight and square to the seal, and is actually the correct metric thread for the application..... No guarantees on any of that!  LOL   I hate rebuilds!!

The helicoil is installed wrong.  I think too deep or something, it ruins the brake line it attaches to.  Also I have stainless transfer hoses, which I think I need to clean up the fittings.

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Great... Sounds like the helicoil was installed by the same guy who but my rebuilt starter together. Glad you found it before it was too late.

So, since they claim the helicoil is a "normal repair", are they going to take that one back for refund? Or are you stuck with the cost?

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2 hours ago, duffymahoney said:

The helicoil is installed wrong.  I think too deep or something, it ruins the brake line it attaches to.  Also I have stainless transfer hoses, which I think I need to clean up the fittings.

How does it "ruin" it?  Might be a clue.  But, if you just don't like helicoils, or any repairs at all, it doesn't really matter.

Helicoils are just normal repair for any screwed up threaded hole.  Screwed up threads are common, that's why "helicoil" is a well-known word of the trades.  The other thread insert guys probably hate that.

https://www.google.com/search?q=helicoil+definition&spell=1&sa=X&ved=0ahUKEwj2irG9h8nZAhVC3WMKHXvqAPUQBQgkKAA&biw=1496&bih=727

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No offense, but once you understand how they work they're not bad when properly installed.  Your case sounds like poor installation.  It's not the thread insert itself, it's the way it was installed.  So, you're right, it was a "half fix" but it's a very common fix.  That's why they didn't tell you, probably.

You might find thread inserts in some of the other holes that didn't leak.  Wouldn't be surprising to find them in the Posi-Quiet calipers either.  "Original equipment" just means it started on a Nissan, before they rebuilt it.  They didn't cast and machine their own calipers.  Notice that they show new pistons, but not new calipers.  Better check.

Sorry.  I'm a bubble buster.

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 If the Heli-Coil is too long and interferes with the sealing surface, they are available in different lengths. I've fine tuned the length of them before installation in the past.

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Thanks guys.

 

I think it’s a lazy fix. Plenty and plenty of Toyota cores to be had. I just like to have things done correctly. 

 

The posi quite is still a stock core (used) but everything else is new and fully tested. I’m sure it’s better then most rebuilds 

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Installed the front zinc centrics calipers. I ditched the stainless lines from the caliper to the coilover tube. Went with traditional lines. No leaks! 

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2 hours ago, duffymahoney said:

I got my centric rears that were back ordered.  They are works of art.  

 

Model 142.42523 and 142.42524

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Those look good. Very unusual to see parts that nice from retailers

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Well I drove the z! She runs a little rough.  I think electronic ignition, check timing and fiddle with the carbs are next.  Also install exhaust.  Boy is it loud with nothing:)

I had to take the brake switch block apart.  It was gummed up and causing some issues.  I also screwed up on the 1" Mc push rod adjustment.  So it was stopping me from bleeding correctly and also gave me terrible brakes.  Re adjusted and it's working well now.  I could use a little more brake, but I think that would mean a bigger booster.  

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Ordered the fujitsubo exhaust system and the White head performance stainless adapter to my stock manifold.  Not to get it all nicely purge tig welded and get the stupid exhaust studs off.  

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Well I broke my exhaust manifold trying to remove a stud.  So I think it's time for a header.  Might as well match my fujitsubo exhaust.  Darn.  I wasn't ready for this decision.  But might as well zinc the rest of the engine bay.  

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Worked on the valve cover over the weekend and also took the rest of the engine bay off for zinc.  

Got a new NOS ballast for my ignition and also upgraded to electronic pertronix coil and points.  1.5ohm coil so hopefully my tach works.  

Valve cover is wrinkle powder coated black.  I love how it turned out. 

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I got the newer type spray bar back from being sonic cleaned and got the valve cover installed. Wow I love the black and zinc look. 

 

This is Prismatic powder coating PWS 4344 Splatter Black  

 
 
 
 

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Edited by duffymahoney
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