oliver

I am going to put water pump on today, do I have to remove the throttle body to do this? Also I read that alot of people bypass the antifreeze running to the throttle body, would any one have an opinion on this?
Thanks Mike

Drew1Down

if your a seasonal driver and only drive your car when its warm out, sure do this mod. If you drive your car in the winter or on very cold mornings, don't do this mod.

http://forums.corvetteforum.com/c4-t...they-work.html

STL94LT1

The TB does not need to be removed to reinstall the WP.

On the TB bypass, why not it won't hurt a thing. I've driven my 94 in 20* weather without issues having the TB bypassed.

pcolt94

I know this answer to be correct and don’t dispute it.

But just wondering if the A/F mixture is changed, or not, from where it should be when the ECM/PCM takes in to account the inlet (sensor) air temperature and water temperature.

Or, is there a theoretical change but negligible?

STL94LT1

I'm thinking it would make very little difference. It would be interesting to see the difference in the actual TB temps with and without the TB coolant, and if there was a way to measure the incoming air temp post TB.

A big benefit to me of the TB coolant bypass mod is to be able to remove the intake with the TB intact without losing coolant.

desertmike1

your fastner is a 6 point "torx" this is were I baught mine for 5 bucks..

http://www.mcmaster.com/#torx-sockets/=d5vglw

oliver

Thanks everone for the help on this car, I have everthing back together. I still have to put antifreeze in but I am a little lost how to do it. Someone said to fill the block first but I am not sure how to do that? I understand the bleeding of the antifreeze with the rag to keep the opti dry.
Mike

Drew1Down

when you have the water pump installed hook up all the hoses but the drivers side (inlet) water pump hose (NOT the thermostat housing hole, the one to the right of it), use that hole (on the water pump) to fill your block.

I used a short old radiator hose connected to the inlet pointed up to fill it. Once i hear it start to gurgle i stop and reconnect the radiator hose, then fill my coolent tank.

oliver

Thanks for the information on filling the block, it worked good for me. The car is running good, I put about 5 miles on and will check the antifreeze level when the motor cools down. I just want to thank everybody for the good advice and getting me through this project, at first I thought that replacing the opti was amost impossible for me to do but with this forumn and all the advice I did it.
Mike