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how to prevent engine fires

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Old Dec 23, 2003 | 09:53 PM
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Question how to prevent engine fires

so what precautions should be taken to prevent engine fires on an older FD?
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Old Dec 23, 2003 | 10:15 PM
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Replace the coolant hoses to the turbos at least every 4 years or so. Ensure your coolant system is running at 9 PSI, not 16. Coolant is flameable - in fact when new a number of FDs (1993) were lost to coolant fires from coolant running onto the red hot turbos - mine lost the engine and turbos. Replace fuel pulsation damper and fuel hoses every 5 years. Watch the electrical harness' for brittleness. Replace if cracking appears. Always run with an air filter (backfire will be quenched).

That should do it.
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Old Dec 23, 2003 | 10:18 PM
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and the fuel system...that's the critical part, priming the fuel system while the engine is off can be vital to gremlin hunting
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Old Dec 23, 2003 | 10:28 PM
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well i have my turbos & intake off right now and ive replaced the coolant lines. which fuel lines are you talking about? about the fuel pressure regulator, where is it and how big of a job would it be to replace? thanks !!
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Old Dec 23, 2003 | 10:37 PM
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Originally posted by David Beale
Replace the coolant hoses to the turbos at least every 4 years or so. Ensure your coolant system is running at 9 PSI, not 16. Coolant is flameable - in fact when new a number of FDs (1993) were lost to coolant fires from coolant running onto the red hot turbos - mine lost the engine and turbos.

That should do it.
I think 9psi/16 psi are mistype: should be 0.9 bar and 1.6 bar.

Can't prove this but I think running 0.9 bar cap reduces the safety factor in the cooling system.

Carry a large fire-extinguisher in the car.
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Old Dec 23, 2003 | 10:58 PM
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0.9 bar is 13 psi. That's what comes stock on the fd and that's what i have on my Pettit AST.
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Old Dec 23, 2003 | 11:10 PM
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yeah... Buy a Fire Extinguisher!!
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Old Dec 23, 2003 | 11:55 PM
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yeah, i should have one in the rear bin or something
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Old Dec 24, 2003 | 12:00 AM
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install a halon system, it only cost about 500 bucks

well that and buy insurance
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Old Dec 24, 2003 | 12:08 AM
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about the FPR, how much is a new one?
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Old Dec 24, 2003 | 04:13 AM
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Like David Beale said, check the fuel *pulsation damper* as well... just in case you misread that as fuel "pressure regulator". But what the hell, check the FPR too.

The pulsation damper is apparently a common leakage point.
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Old Dec 24, 2003 | 09:13 AM
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wow... you guys are starting to freak me out. I do carry a fire extinguisher, and its within quick reaching distance - not like the "riceboy" style of putting it on the passenger side. I have mine in the middle between the 2 rear bins. There is just enough space there for a fire extinguisher without interfering.

Halon system.. what is that? Is that what race cars have ... like sprinklers inside the engine bay?

How many people actually have those btw?
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Old Dec 24, 2003 | 11:18 AM
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Oops, yeah, I'm old and easilly confused. My pressure numbers were wrong.

I have a halon fire extinguisher. Looks like a dry chemical one (size and shape), but is blue. There are also systems that can be installed for racecars. Halon is a gas that smoothers fire. Used to be used in aircraft and computer installations. The claim was people could breath it without problems, so could still get out of the room where the fire was. Due to the ozone hole agreement, it is now phased out. I'm told the replacements don't work as well. I'm also told the US air force are still using it in fighters and don't intend to change until a good replacement is available. The stuff is worth its' weight in gold now.

Where do you guys put a fire extinguisher in the 7, especially if you have no rollbar? I haven't found room for it yet. It absolutely has to be securely fastened down. You wouldn't want that thing to hit you in the head in an accident!
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Old Dec 24, 2003 | 11:24 AM
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Bullet proof your fuel system and you won't have engine fires.
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Old Dec 24, 2003 | 11:28 AM
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Don't breath Halon for the love of all that is holy, please. It will suffocate you.
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Old Dec 24, 2003 | 11:58 AM
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Originally posted by RotorMotor
well i have my turbos & intake off right now and ive replaced the coolant lines. which fuel lines are you talking about? about the fuel pressure regulator, where is it and how big of a job would it be to replace? thanks !!
I will assume you are working from the passenger side of the engine bay. Peering over the lower intake manifold (LIM), you will see attached to the side of the LIM what is called the air control valve assembly. You will need to disconnect the three main nuts that secure it to the LIM (one is way underneath and a bitch to get to). Once you have the LIM off (don't lose the diaphram by the way), then you should see running adjacent to the LIM the secondary fuel rail. At the end of the fuel rail is the fuel pressure regulator. It is held in place with two, small Phillips-type bolts. Because you probably did not run your engine dry to replace the turbos, then you will have fuel in your system under some amount of pressure. BE CAREFUL IN DISCONNECTING THE REGULATOR THAT YOU DO NOT GET FUEL SPRAYED IN YOUR EYES. You also need to take care in removing those bolts as any stress on the secondary fuel rail can snap the fuel rail brackets. In fact, you would probably be best advised to unbolt the fuel rail from its brackets (two bolts) for easier access.
Once you have the pressure regulator bolts out you can usually separate it from the fuel rail easily. Simply install the new one in reverse order making sure you replace the o-ring seal in the process.

As for the fuel lines, there are three key lines you should inspect: one is connected to the end of the fuel pressure regulator itself (the return line), one is a bit towards the driver's side and down from where you found the fuel pressure regulator (the supply line), and one loops to the front end of the secondary fuel rail from the primary fuel rail.
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Old Dec 24, 2003 | 01:29 PM
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Binary, thanks for the detailed description! im going outside to check it out today (glad i have all my x-mas shopping done! )

anyone know if they make a very small fire extinguisher that would fit inside of one of the bins? i refuse to mount it to the a-pillar (id rather let my car burn than have it look like a 15yr olds riced out civic)
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Old Dec 24, 2003 | 06:23 PM
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Originally posted by David Beale
Where do you guys put a fire extinguisher in the 7, especially if you have no rollbar? I haven't found room for it yet. It absolutely has to be securely fastened down. You wouldn't want that thing to hit you in the head in an accident!
Like I put in my post, I have it bolted down to the middle section behind the seats... between the two bin doors. Seems damn stable to me and its hidden so it doesn't look all ricey, and... and.. you can reach for it very easily/quickly.
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Old Dec 24, 2003 | 07:02 PM
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how about dont drive your car......

seriously, if there are no real issues with your car, then you wont have to worry. if it always smells like fuel and your coolant pressure is high, then worry. also, the main cause of engine fires is the fuel pulsation damper.

thats about it...
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Old Dec 25, 2003 | 12:42 AM
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talk of fire scares me...better start looking into an extinguisher!
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Old Dec 25, 2003 | 09:23 AM
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Originally posted by David Beale
Replace the coolant hoses to the turbos at least every 4 years or so. Ensure your coolant system is running at 9 PSI, not 16. Coolant is flameable - in fact when new a number of FDs (1993) were lost to coolant fires from coolant running onto the red hot turbos - mine lost the engine and turbos. Replace fuel pulsation damper and fuel hoses every 5 years. Watch the electrical harness' for brittleness. Replace if cracking appears. Always run with an air filter (backfire will be quenched).

That should do it.
I never knew coolant was flammable. Is this true, cause I'm having serious doubts? Nobody seems to be challenging this though. Not flamming just extremely curious and EXTREMELY doubtful that a water based system can catch on fire.

Greg
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Old Dec 25, 2003 | 09:46 AM
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Originally posted by nycrx7
Like I put in my post, I have it bolted down to the middle section behind the seats... between the two bin doors. Seems damn stable to me and its hidden so it doesn't look all ricey, and... and.. you can reach for it very easily/quickly.
Sorry, maybe I should have started a new thread but...
I recently bought a small extinquisher and was thinking about putting it there too. How do you have your's fastened down? That was the only thing that made me nervous. The bracket it came with for mounting is kind of cheezy and if I crashed and it broke loose from the plastic, it might do more damage (or hurt someone) than it was worth. Anyone have suggestions?
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Old Dec 25, 2003 | 11:59 AM
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Re: how to prevent engine fires

Originally posted by RotorMotor
so what precautions should be taken to prevent engine fires on an older FD?
upgrade your radiator, and if engine is not stock get a bigger intercooler. FMIC will be better.
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Old Dec 25, 2003 | 05:31 PM
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I carry a regular fire extinguisher and a really cool little halon fire extinguisher, just in case.
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Old Dec 26, 2003 | 03:16 AM
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Originally posted by rx7joe
I never knew coolant was flammable. Is this true, cause I'm having serious doubts? Nobody seems to be challenging this though. Not flamming just extremely curious and EXTREMELY doubtful that a water based system can catch on fire.

Greg

Water isn't. Propylene glycol IS.

http://www.roberts.ezpublishing.com/...ts/coolant.htm
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