So I have a '96 Z28. And Im doing a cam swap. As I was pulling everthing apart, I seen the top of my opti. It apeared to have a big dent on the top of the Cap. It was running great when I started taking it all apart, so it wasnt affecting performance. I took the Opti apart to look inside, and what I thought was a dent turned out to be a melted whole. I know the water pump wheep whole is above the opti.
But is it directly above the cap? and could 220-240 degree coolent melt this like this with just drips?
I dont know how to add pictures to this so i put some in my photo album.
Let me know what you think.
Thanks, Eric

 

Was probably just overdue for a cap, I wouldn't overthink it.

Sent from my PC36100 using Tapatalk.

 

I was going to get a new cap and rotor. But the bearinf is sounding really rough. Im just going to buy a new one. Debating between expensive ACdelco or $65 cheepy off ebay. what would be bad with the cheep one?

 

What would be bad about the cheapy? Most everything.

 

The bad part is replacing it again. If selling the car, then cheap is good if you don't mind selling a car with cheap parts.

 

The other question is why should an oversize cap & rotor with a cheap sensor and shutter wheel be so very expensive? Surely a quality Opti with a real bearing should be available for half the price of a gm unit and still yield at least a 100% profit over the manufacturers cost!!

 

Yeah, I found a lightly used GM opti for $100. But I just didnt thing hot coolant could melt the cap like that.
Can anyone see if there wheep hole is right over the cap?

 

The weep hole is dead center in the bottom of the water pump, directly over the Opti. But I've never seen a "melted" cap. Post a picture.

 

I didnt know how to post pictures on the thread, so I put several in my Photo Albumn. Take a look, its pretty bad looking.
Next mod, Electric Water pump. Pluged pump housing and timing cover. Should keep new opti a little happier.

 

yeah you would be surprised at what water can do incrementally.

 

Just post the address to your album.....

https://www.camaroz28.com/forums/mem...icture-6-4571/