5.7 vortec short water pump? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Chilly178 · 03-30-2018, 09:37 PM

I'm looking to put in a L31-R 5.7 vortec in my truck in the next couple weeks. I'm wondering if a short water pump will have clearance for the plastic timing chain cover. I don't want to swap to a long water pump for simplicity or change to a stamped cover because this will void the warranty I think. Also any links to a plug I could get for the crank sensor? Thanks.

Bigdav160 · 03-31-2018, 08:01 AM

My experience is it will not clear.

I've heard you can bolt a metal timing cover to the L31. I have not tried it.

dfosh · 03-31-2018, 09:44 AM

I have a stock short pump on one . I changed the bolts on the back of the pump to allen head button head for more clearance . I tried an after market high flow Tuff stuff an the housing was to thick an would not fit. You can change the cover to the old style do a search their are several things to change.

CaptRMW · 03-31-2018, 09:59 AM

If you are purchasing a GM crate motor be sure to read the fine print on their warranty which is something to the effect that "when installed in a 1996-2002 vehicle".
Good luck. Capt. RMW

03-30-2018, 09:37 PM	#1
Chilly178 Registered User Join Date: May 2016 Location: Green Bay, WI Posts: 135	5.7 vortec short water pump? I'm looking to put in a L31-R 5.7 vortec in my truck in the next couple weeks. I'm wondering if a short water pump will have clearance for the plastic timing chain cover. I don't want to swap to a long water pump for simplicity or change to a stamped cover because this will void the warranty I think. Also any links to a plug I could get for the crank sensor? Thanks. Last edited by Chilly178; 03-31-2018 at 09:38 AM.

03-31-2018, 08:01 AM	#2
Bigdav160 Registered User Join Date: Apr 2011 Location: Klein Texas Posts: 3,852	Re: 5.7 vortec short water pump? My experience is it will not clear. I've heard you can bolt a metal timing cover to the L31. I have not tried it. __________________ My Classics: '72 K20 Suburban + '65 Dodge Town Wagon '72 Corvette Roadster +'67 Corvette Roadster '73 Z-28 Camaro '63 Ford SWB Uni Pickup '50 Ford Coupe

03-31-2018, 09:44 AM	#3
dfosh Registered User Join Date: Oct 2007 Location: greeneville tn Posts: 237	Re: 5.7 vortec short water pump? I have a stock short pump on one . I changed the bolts on the back of the pump to allen head button head for more clearance . I tried an after market high flow Tuff stuff an the housing was to thick an would not fit. You can change the cover to the old style do a search their are several things to change.

03-31-2018, 09:59 AM	#4
CaptRMW Custom Sport W/T Join Date: Nov 2010 Location: Tarpon Springs,Fl & Annapolis,Md. ....................Quaint drinking villages with a fishing problem Posts: 898	Re: 5.7 vortec short water pump? If you are purchasing a GM crate motor be sure to read the fine print on their warranty which is something to the effect that "when installed in a 1996-2002 vehicle". Good luck. Capt. RMW



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