The banner above is an advertisment - if it asks you to download software, please ignore.
Site News - 3/26 M Car Covers (by State of Nine) | 12/12 Make Amazon Pay Saabnet!
Date: Fri, 02 Sep 2005 21:21:00 +0100
From: Pooh Bear <rabbitsfriendsandrelationsnospamail.com>
Subject: Re: SAAB Quality Since GM?


Malt_Hound, > wrote: > Johannes wrote: > > > > Pooh Bear wrote: > > > >>mattleibovitchnospaml.com wrote: > >> > >> > >>>I agree. The DIC shouldn't even be a replacement item. GM's various > >>>distributorless ignition setups (since 1984) have proven to be pretty > >>>much trouble free and will last "forever" much like any other > >>>solid-state electronics. Why is Saab's version so very different? > >> > >>Because the're too much clever electronics is in that DI cassette ? > >> > >>As an electronics designer, I'd like to know what the typical failure > >>mode(s) is (are). I'll bet there's something(s) straighforward that's > >>fixable by design. > >> > >>Graham > > > > > > The failure is related to the heat and lack of cooling possibilities when > > mounted on top of the engine. I took mine apart, the insulation in one of > > the coils had burned through, I guess it short circuited. > > > > It also help if you diagnose any overheating problem immediately, i.e. > > don't drive round with the temperature gauge at 3/4 mark. It must always > > be at a healthy 1/2 mark. > > With the way the cooling systems were designed in the late 80's early > 90's, I would guess that you are probably right on the money about the > overheating being related to DIC failues. I mean, it doesn't make any > sense to me that you would use an 89 degree C thermostat, and use a > thermosensor switch in the radiator that first turns the fan on at 87 > and doesn't put the fan at high speed until 92!! > > How did the designers suppose that we were going to cool the engine down > (and regulate it) to 89 degrees with > 92 degree coolant at the outlet > of the radiator? > > And this most certainly was not a GM design issue... The opening temp of the 'thermostat' is merely that. It prevents a cool engine from getting cooling it doesn't need. The coolant will actually be a lot hotter than the thermostat temp once the engine's doing some serious work. You're taking the meaning of 'thermostat' too literally. Graham

Return to Main Index
StateOfNine.com
SaabClub.com
Jak Stoll Performance
M Car Covers
Ad Available

The content on this site may not be republished without permission. Copyright © 1988-2024 - The Saab Network - saabnet.com.
For usage guidelines, see the Mission & Privacy Notice.
[Contact | Site Map | Saabnet.com on Facebook | Saabnet.com on Twitter | Shop Amazon via TSN | Site Donations]