1989 K5 5.7 water pump rotation? Same as a newer 5.7 Vortec?

[bassackwards]

I have this now

And when I get the 383 Vortec installed I hope to use the same layout. Here is a diagram for a 1999 Escalade 5.7

Will I be able to use my current accessories with a new Vortec style water pump? It looks like they should be compatible

 

[frankin5]

Yes, if you all your currant brackets. The 99 brackets and accessories are different than the earlier 90 and the 80's. Correction the Vortec pump has a bypass hose like a big block. You have a vortec manifold as they are different and need the bypass hose.

 

[sweetk30]

i just went threw this .

used a new 5.7 L31 vortec engine .
water pump for say a 92 sbc 350 from a pickup .
then bypass hose from intake before going up the t-stat and then to nipple on top of water pump .

reason for bypass hose on vortec engines is no bypass circit like the older engines .

i also have the 90's style sbc serp belt stuff on the front of my engine no problems.

 

[bassackwards]

i just went threw this .

used a new 5.7 L31 vortec engine .
water pump for say a 92 sbc 350 from a pickup .
then bypass hose from intake before going up the t-stat and then to nipple on top of water pump .

reason for bypass hose on vortec engines is no bypass circit like the older engines .

i also have the 90's style sbc serp belt stuff on the front of my engine no problems.

I ordered a water pump for 96+. Did I mess up?

 

[sweetk30]

your fan wont fit unless you use a fan setup for the 96-03 vortec series engines . since there a BIG center spin on fan not a 4 bolt bolt on fan like older stuff . also water pump pulley will prob be different to match it also .

but if going electric fan they it wont case .

 

[bassackwards]

Well darn. Luckily I am junking another Vortec engine van to get the 411 PCM and wiring

 

[bassackwards]

i just went threw this .

used a new 5.7 L31 vortec engine .
water pump for say a 92 sbc 350 from a pickup .
then bypass hose from intake before going up the t-stat and then to nipple on top of water pump .

reason for bypass hose on vortec engines is no bypass circit like the older engines .

i also have the 90's style sbc serp belt stuff on the front of my engine no problems.

Do you have a couple of pics showing the hose routing?

Also, did they change oil pan bolts on the L31? Some venders say they are all the same, some say they are different

 

[sweetk30]

i used the stock pan that come on my new gm engine .

if your using a 96-03 vortec L31 water pump its stock then .

me i used old school water pump for my serp belt setup from a 91k5 blazer . then i removed the plug on top of the 91 water pump and did a 1/2" pipe to barb fitting . then a molded 5/8" bypass hose with a 90* turn in it . then a 3/8" pipe thread to 5/8" barb 45* fitting to my intakes specific bypass port location from edelbrock .

next is pass side front hose nipple at intake normal spot to heater core . then heater core to pass side rad tank fitting .

i have some pics but i only host here and your not a paid member to view them .

so far it seems to be working real good after i figured out the need for the bypass hose suction at the front of the intake .

 

[bassackwards]

I have 2 L31 engines and neither one came with oil pan bolts. Got pans but no bolts

 

[sweetk30]

couldnt tell you off hand then sorry .

not saying 100% but all the stuff i installed was american threads in my block and heads .

 

[dyeager535]

Do you have a couple of pics showing the hose routing?

Also, did they change oil pan bolts on the L31? Some venders say they are all the same, some say they are different

I want to say they are all all standard, but my L31 crate came with the "reinforcement" plates across the rails, so perhaps GM used longer in all the positions? I didn't have any old ones to compare with, but those plates are relatively thick, compared to the diameter of those screws, so I can see GM lengthening them for that application.

Found out how critical the length is of fasteners with the rear diff...bolts that were MAYBE 1/4" too short continuously backed out of the diff cover.