rodney

hello all, a few days ago i posted up https://www.yotatech.com/forums/f116/94-pickup-overheating-22re-99691/ that my 22re was overheating after a timing chain swap. i purchased the complete kit from engbldr.com, which included the all chain components, timing chain cover, water and oil pumps. after installation, i then had an overheating issue at idle.

i thought it was the the thermostat, so i bought an oem toyota one, and it still did not solve the problem. i figured it had to be the waterpump, as i did not have this problem earlier. so, i purchased an oem toyota water pump, and pulled her apart again. i noticed the impellers were quite different. i installed the oem pump and it solved the problem. sorry about the grainy pics, but i used my cell. the wife had the digcam in her possession....

oem pump on left, engnbldr (rock products) pump on right




the toyota pump has much larger/deeper impellers, and the impellers are closer to the housing. the rock pump has more impellers, but they are much smaller, and the tolerences are larger. i would think that the pump moves less coolant at idle, hence my overheating problem.

so, imho, do not buy a rock waterpump, or any other aftermarket pump that looks like this. i am not saying anything about engnbldr.com, as they were helpful when i called, but i guess they switched suppliers and were unaware of the problem.

all_terrain17

I HIGHLY doubt that's what your problem was.

dcg9381

Valid point, however.. I'm sure Ted will take care of you.
There are a *bunch* of his kits working today w/o any problems... Might point the issue out to him, he's usually very dilligent about searching for the right parts.

rodney

why do you say that?

JEDI87

Obviously it was if it didn't do it afterwards. I had the same problem( not with engnbldr) but with a kragen pump. It actually started knocking. I swapped in a toyota pump and everything worked fine. Glad it was an easy fix.

all_terrain17

The impellers on the the Duralast WP I put on mine look just like the ones you got from EB...Never have I seen the temp gauge get past halfway w/ OEM or my current pump under any conditions.

Then again, if all you did was replace the pump like you said, that has to be your problem - assuming you didn't botch the first installation like me

texsurfer

looks more like a hamilton beach blender

rdlsz24

Amazing what minor differences in parts make. I ran into a similiar situation with new starters I installed earlier this year. Both were for the 22RE, but minor differences in the teeth made one grind like hell and the other work smooth as silk.

Rob