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Z32 Technical Discuss all 300ZX (Z32) related Technical topics here - how do I diagnose, modify, repair etc

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Old 30-06-2008, 03:35 PM   #1
MoulaZX
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Z Surgery... Heater Core removal (Pics inside)

Alrighty, basicly Heater Core had to come out. Started this morning round 9am, its now 2pm-ish. Roughly 4 hrs between breaks, Dash is out, Heater Core out and on its way to being checked out to see if repair is possible (I doubt it). Here are some pics from what a Z looks like on the inside as I took it apart lol.

Dash finally out, was surprisingly easy, took about 2-3 hrs total to get to this point.


3 Pictures from how bad my Heater Core was leaking...






Picture showing where the Heater Core slides into the side, how this is possible to remove without taking the dash out seems impossible.


Dash out and sitting aside, again, surprisingly easy to get out.


Was an absolute nightmare to get to this point. About 2 hrs to get to less than a handful of screws / bolts, finally after ripping out the clutch pedal and what im guessing as some computer to the right of the AC motor / controls found out there was 1 last bolt behind the box holding the main water pipes to the box!!!


How much crap I had to take out heh.


I have one question though, my dad was telling me in order to get this box out much simpler was to disconnect the rubber pipes inside the engine bay behind the engine that pass through the firewall. Was that how I was supposed to do it?

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Old 30-06-2008, 06:25 PM   #2
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yeah thats how you do it, theres an article in the tech section which tells you what hose to get etc, i done it, as my heater core died, and havnt had time to replace yet, sucks havin no heat tho ;P
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Old 30-06-2008, 06:29 PM   #3
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USE THIS TIME TO RE-GLUE YOUR DASH IF ITS LIFTING AROUND THE VENTS

Chad (the muffler king) did a nice tech article on heater core remove and refit ,search it out,im sure you will pick up a few nice tips from it
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Old 30-06-2008, 07:08 PM   #4
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dont fix it, just get a new one there cheap
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Old 30-06-2008, 07:12 PM   #5
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Quote:
Originally Posted by 300zx loser View Post
dont fix it, just get a new one there cheap
christ u r a nooooob,read his thread and youll see he is looking for a new one lol

http://www.aus300zx.com/forum/showthread.php?t=277067

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Old 30-06-2008, 07:18 PM   #6
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you can get them anywere. uas, ttz, coz lol not hard to find. sorry i dont sit infront on my computer all day reading threads FREAK
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Old 30-06-2008, 07:19 PM   #7
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Moulazx Heater Core Removal

Hi there MoulaZX,

Whoa, hold up - did anyone inform you that there is a spaghetti monster in your car (first pic) .

Just love the last pic of the wheelbarrow - just great.

Good effort so far, well done.

You just reminded me - yep, I have a BIG job ahead of me as well, damn heater core...
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Old 30-06-2008, 07:20 PM   #8
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Quote:
Originally Posted by 300zx lover View Post
you can get them anywere. uas, ttz, coz lol not hard to find. sorry i dont sit infront on my computer all day reading threads FREAK
Ones from the states DO NOT FIT! Must buy a RHD specific one.
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Old 30-06-2008, 07:35 PM   #9
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Quote:
Originally Posted by 300zx(my zed is the only in Aust one that can use a lhd heater core ) lover View Post
you can get them anywere. uas, ttz, coz lol not hard to find. sorry i dont sit infront on my computer all day reading threads FREAK
well thats obvious,U.S ones dont fit pizzaboy
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Old 30-06-2008, 07:37 PM   #10
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Finally got home!

First of all, if you need to replace your Heater Core and you end up buying a 300ZX one, im going to slap you. Really. Really. Hard lol.

PICTURES!

Right one is my Heater Core, the original 300ZX one, to the left, a 2000 Mitsubishi Lancer Heater Core... they are 100% identical, not a bloody thing different, looked them up in the book and they both have the same item code.

The only visual difference are the old Lancer pipes I havent bothered to take off yet on the left one and the rubber thing you glue onto the middle of the 300ZX one on the right.







Lancer one still has the pipes hanging off it.





Result = 300ZX Heater Core New $250, Used $150 ish. Lancer Heater Core New $No idea lol, used (good condition) $45! (once I counted the 5 bucks in change I found in the Lancer )

I forgot exactly who said to look for a Mitsubishi one (I think it was like 2 or 3 people) but whoever you are I love you lol.
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Last edited by MoulaZX; 30-06-2008 at 07:44 PM..
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Old 30-06-2008, 07:46 PM   #11
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ur a virgin
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Old 30-06-2008, 07:57 PM   #12
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Could you have done it ...

without removing that major brace in the bottom of this pic?



I saw in a US post on this subject that one guy found his targas didn't fit as well after he did this job because the body flexed with the dash out. Have you had any such probs?

I am very interested in this - my heater is bypassed and the replacement core sits on the shelf demanding to be installed. I am not looking forward to it.
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Old 30-06-2008, 08:14 PM   #13
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To get the dash out, yes, to get the box out, no. Why that guy's Targas didnt work after he reinstalled the brace I have no idea, unless there is some force applied after the brace is removed why would the area change shape? there isnt enough weight in that area to warp the car in a way that would affect the Targa tops once the brace has been removed.

I was going to bypass the Heater Core but since its Winter and waking up at 4am in the morning and driving to work at 5, cabin temp hovers around the 5-7 mark... just, no, has to be done lol.

Where abouts on the coast are you? if possible I could come up to give you a hand, would take a full day.

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Old 30-06-2008, 08:14 PM   #14
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It was myself and black baz who gave you the info(we also advised you to buy new NOT s/hand) this is because a s/hand one can fail as soon as you finish fitting it. Most of the failures are due to corrosion in the core.

We get a warm fuzzy feeling from being remembered for our assistense(you get the same feeling from hot water dribbling on your feet).
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Old 30-06-2008, 08:20 PM   #15
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It isn't necessary to remove the brace(because it isn't necessary to remove the heater box) but it can be easier in some cases.

If you remove the electrics on the drivers side of the heater box, you can slide the core out, just. This is if you remove the clutch pedal(in a manual).

Bugger of a job regardless!
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Old 30-06-2008, 08:26 PM   #16
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Thats right lol I found the post. Thank you!!!

Quote:
a s/hand one can fail as soon as you finish fitting it
But why would it fail? if the core is in good condition and you are careful, there is no greater risk than installing a brand new one because the only part I believe can fail is if you connected the pipes wrong which in that case can just as easily happen with a brand new core. Or if you're rough enough to damage it as you're sliding it back in or some part of the core collapses etc. Again, my box is completely out of the car, extremely easy to slide a core in and out... that didnt sound right did it...

Should go without saying, tested the core under pressure and it was all good. Sealed one of the holes, plugged the other one to a compressor and blasted some air into it, not an excessive amount but enough to put it under a little strain while it was submerged under water.

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Old 30-06-2008, 08:26 PM   #17
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so after all that work..

you still put an 8 yr old second hand one in???
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Old 30-06-2008, 08:27 PM   #18
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Some people are running ones from factory are they're still fine... thats what, 20 years?

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Old 30-06-2008, 08:32 PM   #19
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Quote:
Originally Posted by CHILI View Post
It isn't necessary to remove the brace(because it isn't necessary to remove the heater box) but it can be easier in some cases.
Thats exactly why I took mine out.

Quote:
Originally Posted by CHILI View Post
If you remove the electrics on the drivers side of the heater box, you can slide the core out, just. This is if you remove the clutch pedal(in a manual).
Thats also why I took the box out, that 'just' worries me, dont want to damage the core as im putting it back in.

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Old 30-06-2008, 08:33 PM   #20
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You have no idea what the history is of a used heater core(it may have been used without coolant) in which case it may fail any moment. At least with a new item you have more reason for confidence.

I don't think I would like to remove it all again, just to save $50 initially.
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