94Z28LS1toLT1

hey gang,im looking to find the hose size that's on the oil adapter that connects to the water pump,my mechanic has put one on thats a lil too big and coolant is dripping out after i shut the car off,id rather just do this myself and tackle it and be done, and not have him touch it please and thank you

blac94Z

Take the old hose to autozone ?

Injuneer

Do you mean the oil cooler bypass hose, #16 in Shoebox's diagram:

http://shbox.com/1/93-94_hoses.jpg

It has the part # shown.... see if GM still makes it, or if there is an aftermarket replacement.

Did the "mechanic" save the old hose, or can he retrieve it from the trash barrel?

94Z28LS1toLT1

thank you TJ,hose is DC gonna head to wreck yard in morning and see what i can find lol

kinda complicated Fred but i got that oil cooler bypass hose from a guy selling parts, im gonna have to take a pic and show you what my mechanic did, he mickey moused it but not very well,hose that inserts into the WP side running to the oil cooler the metal part is cut off and two clamps, but the hose doesn't even fit tight and coolant is leaking and seeping through after i shut the car off

Injuneer

Measure the ID of the hose he used and get the next smaller size. Or measure the OD of the connection on the water pump.

Do you have the cooler or do you have the bypass (without oil cooler)?

94Z28LS1toLT1

hey Fred i just got back from pic a part now, i grabbed two hoses and i have the cooler,but on the 94 can they get bypassed,id rather do that and not have to worry about the aluminum/metal line getting crack or leaking in the future

Injuneer

Sure. Install the bypass hose per Shoebox's diagram.

My cooler has remained intact for 21 years. Never had a problem of any kind with it.

94Z28LS1toLT1

thank you i just got done putting the hose in but im gonna fill coolant and bleed tomorow,ill let you know any news if it still leaks or not,then ill try that bypass if i don't have any good results

blac94Z

Dont delete it how will your oil get cool ?
Just change the hose and keep your car running better i say you may have something else in mind

bw_hunter

GM decided these cars didn't need the cooler after 1995 so you can be confident that he oil will cool adequately under normal driving conditions without one. That said, mine has one and it has worked just fine for 21 years and if it failed tomorrow I'd repair it. I just like keeping everything it came with functioning properly...

94Z28LS1toLT1

yea ill keep keep just was wondering bc that aluminum part on the hose drives me nuts lol and the hose i got went on perfectly,doing a throttle body clean up while im at it.

thank u for that info

Hey Fred i decided to clean the throttle body now, i took off the IAC sensor to look at it, i noticed the pintle/spring is coming out far,i have a new one in the box still in my tool box, and the spring/pintle is all the way in. In another thread i asked you i have idling problems when i first start it up,that the idling is low like 600 to 700 then will climb up to the normal idle 900. Is the IAC sensor supposed to look like that when the engine is cold?

Injuneer

First... IAC is not a "sensor", it's an "actuator". Minor point, but worth clarifying. It doesn't tell the PCM anything, it just moves in response to PCM command.

The IAC motor will "park" on shutdown, and logically it would go to the "learned" position. On cold start, it will open up to raise the idle speed to the elevated RPM based on coolant temp. It sounds like yours is normal.

Don't try to move the pintle on the old unit, that can damage it. To install the new unit, you have to move the pintle to match the old unit. That's OK to do. See Shoebox's guide:

4th Gen LT1 F-body Tech Articles