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Old 11-02-2016, 02:57 PM
Sausage King
Join Date: Aug 2016
Location: Anderson, South Carolina
Posts: 21
om603 lift pump nuts

Does anyone know what size the nuts are on the om603 primer lift pump? I believe mine are worn. New lift pump installed but one nut won't tighten.
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Old 11-02-2016, 04:21 PM
babymog's Avatar
Loose Cannon - No Balls
Join Date: Jan 2006
Location: Northeast Indiana
Posts: 10,767
This forum specifies gasoline engines, ... you might do better posting this in the DIESEL forum.

Gone to the dark side

- Jeff
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Old 11-03-2016, 05:59 AM
Stretch's Avatar
Gettin' outa chokey
Join Date: Sep 2009
Location: Between a rock and a hard place (Back in Holland at the moment)
Posts: 13,986
Wild guess - M8 coarse thread...

...sorry but you'll have to check for yourself.


I can give you some better advice, however, an assortment of high tensile (not the soft cheap junk!) zinc coated steel nuts, bolts and washers is a great investment for any DIY mechanic - saves a lot of cocking about.
1992 W201 190E 1.8 171,000 km - Daily driver
1981 W123 300D ~ 100,000 miles / 160,000 km - project car stripped to the bone
1965 Land Rover Series 2a Station Wagon CIS recovery therapy!

Don't leave that there - I'll take it to bits!
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Old 11-03-2016, 10:20 AM
Registered User
Join Date: Feb 2007
Location: los angeles
Posts: 535
if there small =6x1.00mm or large 8x 1.25mm
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