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, 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.
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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
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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.
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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
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