Forums/Z31P/z31-basics basic-modifications-basic-questions-aka-the-newbie-forum/Removing engine bay master cylinder heat shield
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perna00: (2010-06-29 23:57:42)
I took my master cylinder heat shield off of my 84' t to get to the o2 sensor. I was wondering if it would hurt it leaving it off since a bolt snapped in the hole. Has anyone else removed thiers with success or failure through time? Thanks.
Guest: (2010-06-29 23:59:02)
You can leave it off.
1985_Turbo: (2010-06-30 00:21:07)
I left mine off after installing a new brake master.
I believe it's main function is (for 84-85 turbos) to "force" the air coming in from the scoop towards the turbo, for cooling purposes.
you wont notice any differance with or with-out it.
floridaZ: (2010-06-30 02:16:40)
Different heat shield on the 84-85 turbos then on the rest of them. I personally think that it's purpose is to reduce long-term heat fatigue to the brake master cylinder. Probably won't hurt to leave it off though.
perna00: (2010-06-30 02:30:12)
Thanks for the info. Looks like another piece lost in the "weight reduction" campaign, lol.
TearingRaven: (2010-06-30 15:19:09)
Nissan loves to spend money filling your car with useless parts. That's how they make money!
Seriously, it's there for a reason for it being there. Unless you NEED to eliminate it, leave it the hell alone.
NissanXRMA: (2010-06-30 22:24:03)
Relax. It's just a piece of steel. It's okay to remove it.
TearingRaven: (2010-06-30 23:30:54)
This attitude keeps the newbie forum full of fresh topics [archived image: smile.png]
NissanXRMA: (2010-06-30 23:47:53)
[quote]TearingRaven wrote:
Relax. It's just a piece of steel. It's okay to remove it.
This attitude keeps the newbie forum full of fresh topics [archived image: smile.png]
Well if you have removed the shield and damaged the master cylinder, then speak up. If not stop acting like you are.
TearingRaven: (2010-07-01 00:10:02)
I had to replace my master cylinder at 93,000 miles and that's with the heat shield in place. Hot exhaust (especially a turbo) beating heat on your master cylinder which has seals in it can only increase wear unnecessarily.
Who do you honestly think is a better engineer? You or Nissan Motor Company?
Careless: (2010-07-01 05:18:52)
those are the only two heat shields i decided to keep on my motor, the lower and upper brake heat shields.
that area gets way hot already, no reason to blast heat at it with the turbo sitting right next to it.
NissanXRMA: (2010-07-01 05:36:35)
Good for you replacing your master cylinder, though it is irrelevant to the question asked.
Never said i was a better engineer than nissan. Just saying that if you take it off, your master cylinder most likely isn't going to melt when you turn the key if you took off the shield.
85z31t88: (2010-07-01 05:51:05)
[quote]NissanXRMA wrote:
I had to replace my master cylinder at 93,000 miles and that's with the heat shield in place. Hot exhaust (especially a turbo) beating heat on your master cylinder which has seals in it can only increase wear unnecessarily.
Who do you honestly think is a better engineer? You or Nissan Motor Company?
Good for you replacing your master cylinder, though it is irrelevant to the question asked.
Never said i was a better engineer than nissan. Just saying that if you take it off, your master cylinder most likely isn't going to melt when you turn the key if you took off the shield.
I believe he was referring to his lasting 93k miles with the heat shield in place. As far as I know the master cylinder in my car is original as well and the car has 101k miles. All with the heat shield in place.
I chose to keep all my heat shields in place on my 85 mostly because I think it helps force some air down towards the turbo and keeps heat away from my brake and clutch master cylinder. Also wiring in that area has been known to melt or deteriorate with excessive heat.
khyronzx: (2010-07-01 15:32:07)
Took mine off years ago, had to replace the m/c two years ago, not sure if it had any thing to do with it though. Replaced at like 175k. It definetly helps guide air from the scoop down to the turbo on 84-85's.
NissanXRMA: (2010-07-01 17:02:54)
^^
BLOZ UP: (2010-07-01 17:05:10)
No, it doesn't. Not by design. It's for heat only.
khyronzx: (2010-07-01 18:56:34)
Sure looks like it does to me and others agree. You didn't engineer and/or design it and I don't think you've done any wind tunnel testing on it either. Nor have you quoted or shown any evidence to support your opinion but you stated it such as being factual. Not trying to start anything.
TearingRaven: (2010-07-01 19:49:26)
[quote]NissanXRMA wrote:
I had to replace my master cylinder at 93,000 miles and that's with the heat shield in place. Hot exhaust (especially a turbo) beating heat on your master cylinder which has seals in it can only increase wear unnecessarily.
Who do you honestly think is a better engineer? You or Nissan Motor Company?
Good for you replacing your master cylinder, though it is irrelevant to the question asked.
Reading comprehension FAIL
NissanXRMA: (2010-07-01 19:54:20)
[quote]TearingRaven wrote: [quote=NissanXRMA]
I had to replace my master cylinder at 93,000 miles and that's with the heat shield in place. Hot exhaust (especially a turbo) beating heat on your master cylinder which has seals in it can only increase wear unnecessarily.
Who do you honestly think is a better engineer? You or Nissan Motor Company?
Good for you replacing your master cylinder, though it is irrelevant to the question asked.
Reading comprehension FAIL
It was irrelevant because your heatsheild was STILL IN PLACE. It could have failed for many reasons. Most likely because of age.
BLOZ UP: (2010-07-01 20:20:10)
I guess then, by popular opinion--since it looks like it does, then it does.
This directs air:
[archived image: air_intake_ls1_camaro_firebird.jpg]
This shields the master cylinder from heat:
[attachment=0:1fyrpyjp]rsz_img_0030.jpg[/attachment:1fyrpyjp]
khyronzx: (2010-07-01 20:43:33)
It sits directly at the back of the hole in the hood for the scoop. Haven't looked at it in a while but that looks different iirc. I'm going to dig it out of storage when I go to get parts out after work.
BLOZ UP: (2010-07-01 20:45:52)
The point I tried to make is that it's not sealing anything. Saying it "directs air to the turbo" is like saying that your hand "directs water to your mouth" when your fingers are spread apart.
khyronzx: (2010-07-01 20:58:17)
Got ya, but you can't deny removing it will affect where the air entering the engine compartment from the scoop opening goes.
perna00: (2010-07-01 23:04:41)
I take it nobody has any melted plastic reservoir tanks or melted wires because of removing it then? Looks like it is alright to leave off then. Thanks.
michaelp: (2010-07-02 01:12:00)
Mines off since I did the turbo swap, I plan to put it back on this weekend though.
NissanXRMA: (2010-07-02 05:36:58)
Took mine off. The downpipe off the top mount turbo is wrapped and doesn't get too hot.