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Author Topic: need help with pontiac 400 water pump ??? 84SVOrick ¯ Member # 9039 posted                              Im doing a rebuild for a buddy and im stuck on this simple thing, so after installing the timing cover and water pump ive noticed that there is a hole in the back of the water pump that matches to a hole in the manifold, only thing that came in the gasket kit was a rubber o ring. I installed the oring and manifold but it jus doesnt seem right like maybe im missing a part. Any body with knowledge of this please chim in I dont want to finish it to find out if it will leak or not. Thanks guys -------------------- Bay Area Stunnaz RIP Jeannera "FOXY302" 10/29/87-10/9/10 1984 SVO 302 HCI a basic bitch 1986 GT FOXY302 stolen and totaled R.I.P. Posts: 1928 | From: Vallejo CA | Registered: Mar 2009  |  : Tom Renzo ¯ Member # 13165 posted                              There is a special O ring that goes there. It is square cut and is available from GM dealer. It is not a conventional O ring.It is a square cur O ring and it is app 3/8 thick The ring is also available from Fel Pro by buying there timing chain gasket set. But buying a set just for the O ring is over kill. Try your dealer [ 2014-04-28, 05:48 PM: Message edited by: Tom Renzo ] -------------------- I spend money i don't have. Building cars i don't need. To impress people i don't know. Posts: 557 | From: CT | Registered: Sep 2013  |  :

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