Heater connection to exhaust manifold - B200E

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kelvingenders
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Heater connection to exhaust manifold - B200E

Post by kelvingenders » 16 Jan 2012 11:28 am

Just tried to connect the heater tube to the exhaust manifold on the B200E and the nut keeps getting mis-threaded. I has noticed that there is a bush on the end of the tube for sealing purposes. Is the nut mean't to tighten write down or is this mis-thread a design feature? Ideas

Ride_on
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Re: Heater connection to exhaust manifold - B200E

Post by Ride_on » 16 Jan 2012 08:11 pm

You have a heater tube on an exhaust manifold?? The carb cars have a pre-heater for carb icing, didn't think the injection cars had one?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

Nimminz
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Re: Heater connection to exhaust manifold - B200E

Post by Nimminz » 16 Jan 2012 09:45 pm

Aye mine has one, with a thermal valve thing on the bottom of the airbox.

Afraid i can't help with your problem though mate, never took the thing off mine
'88 360 +T LSD - sold
'87 760 TDI (D24TIC) - sold
'04 V40 D sport (F9Q, decat, Remapped, launch control)
'89 740 SE (b230ft, 12psi, V-cam, headwork, 'remapped', banded steels)
'86 340 DL 1.4

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macplaxton
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Re: Heater connection to exhaust manifold - B200E

Post by macplaxton » 16 Jan 2012 09:52 pm

No experience of this specific case, but mis-threading doesn't sound like good news to me. :(
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Ride_on
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Re: Heater connection to exhaust manifold - B200E

Post by Ride_on » 20 Jan 2012 12:42 am

What does an injection need hot air for? My more modern 940 doesn't have one and I fairly sure my 87 GLT didn't have one. Am I missing something?
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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Chris_C
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Re: Heater connection to exhaust manifold - B200E

Post by Chris_C » 20 Jan 2012 01:53 am

Your 940 has closed loop intelligent injection though. The 360 system is epically primative and doesn't have either a water temp sender (from memory) or lambda to know how hot the engine is as to when to vary the fuel put in. The flappy paddle may be crude, but the bi metallic strip works enough to keep everything almost right all the time.
'89(F) 340 GL F7R (ex B172k) - Fake -> SBKV 300 Runner Up 08, 12 - NASLR Time 15.7secs
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'91(H) 340 GL B14.4E - Kar; '88(F) 360 GLT B200E - Jet -> BKV 300 Runner Up 09; '89(G) 360 GLT B200E - Beast

kelvingenders
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Re: Heater connection to exhaust manifold - B200E

Post by kelvingenders » 21 Jan 2012 09:44 am

We are talking about a small metal tube that runs from the manifold...nearest the firewall to the heater. shall i provide a picture... then everyone will be happy?

Ride_on
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Re: Heater connection to exhaust manifold - B200E

Post by Ride_on » 22 Jan 2012 03:50 pm

Chris_C wrote:Your 940 has closed loop intelligent injection though. The 360 system is epically primative and doesn't have either a water temp sender (from memory) or lambda to know how hot the engine is as to when to vary the fuel put in. The flappy paddle may be crude, but the bi metallic strip works enough to keep everything almost right all the time.
Ah Looking at the Haynes manual I see it now, same as the carb, must be to do with emission controls trying to manage the varying air temp coming in as the car has a air volume meter rather than an air mass meter. These pipes are often missing and air measurement technology has improved in later cars along with computerised injection mapping so they don't have them. In carbs it will cause you severe problems in some conditions, but injections just a little economy or performance damage.

BTW the 360 B200E has a thermal time switch that switches on an extra injector for really cold starts, that last only a sort period. Modern cars just enrichen the mixture with software (computerised injection control) and a temp sensor. Lambda feedback is too slow for real time closed loop control, its really a replacement for the adjustment, but it useful for things like altitude changes, hence injector output is memory mapped to air mass and throttle position in a non-closed loop fashion with Lambda providing a slow closed loop feedback adjustment.

Anyway Sorry for the distraction, probably mixing up my different cars 940s etc.
1980 345 DL_______1987 360 GLE (project car restored to GLT spec and B230FT'd)
1984 360 GLT______1987 360 GLT
1983 360 GLS______1989 360 GLE
1985 340 GL_______1986 340 1.4
1985 360 GLS______1995 940 SE 2.3 Turbo Estate (daily)
1987 340 GL 1.7

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