03-12-2013, 08:55 PM 
	
	
	
		Why do the hdi's have two sump plugs, one otop of the other? No one seems to know? Iv heard some crap theory's but nothing solid?..........anyone?
	
	
	
	
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					The sump plug mystery?
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		03-12-2013, 08:55 PM 
	
	 
		Why do the hdi's have two sump plugs, one otop of the other? No one seems to know? Iv heard some crap theory's but nothing solid?..........anyone?
	 
		
		
		03-12-2013, 09:02 PM 
	
	 
		Don't know for sure but I always assumed it was for a sensor that was used on other cars with that sump, oil temp or something.
	 
		
		
		03-12-2013, 09:06 PM 
	
	 
		i could tell you but id have to kill you cause its a secret!
	 
		
		
		03-12-2013, 09:09 PM 
	
	 
		If it's the same sump as the XSI/'6 its for the oil temp sensor
	 ![[Image: car-1.jpg]](http://i1117.photobucket.com/albums/k591/grant-306/car-1.jpg) Member of the 99% warning or you're nothing club 2000 Moonstone 1.8 Meridian - Sold 2000 China 3dr XS - Dead 1998 Diablo 3dr XSI 
		
		
		03-12-2013, 10:15 PM 
	
	 
		Iv never seen any psa sump with a sensor located there though. I dunno. Possibly the designer dropped a bollock and realised he could only drain half the oil so added a lower one as a last ditch attempt . Tbf the blank for a sensor explanation seems more viable though.
	 
		
		
		03-12-2013, 10:35 PM 
	
	 
		so you can pick which angle to drain your oil at . . .   
Phase 1 D-Turdo, K14@24 psi, De-cat, meaty backbox, Bosch pump, grinded LDA pin, duel air fed K&N =133.7bhp & 188ft/lbs
 
		
		
		04-12-2013, 09:05 AM 
	
	 
		I think there is a set volume of oil left if you have the car perfectly flat (ie on a ramp) and drain from the top one too.
	 
		
		
		05-12-2013, 01:06 AM 
	
	 
		Might be a mad suggestion but, is it a breather plug?
	 
		
		
		05-12-2013, 01:30 AM 
	
	 
		I always take the filler cap of for a breather when i drain one out
	 
		
		
		05-12-2013, 06:43 AM 
	
	 
		Good point. Lol
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