water pump pulley

[ca18detsilvia]

ok, i've searched alittle but cant really find the threads that discused this although i remember seeing them in the past, but i just rebuilt my motor and have a ca18de fwd water pump installed, and as we all know its not essentric on the pulley so there is room for a slight wobble. its just something small that is bugging me, but would a water pump pulley from a CA16 or CA18 fwd car work or are the sizes different, also by chance would a crank pulley work off of a CA16de?? thanks guy's

[BoroBoroS13]

I have the same problem but havent installed my motor yet so I dont know if it will cause any problems. Just gonna have to wait and see...

[biosehnsucht]

Someone was going to compare the pullys some time ago, not sure whatever happened with that.. I forgot who it was.. ?

[ca18detsilvia]

i mean my car has been running for 2 day's now with the set up, but i know its not good for the waterpump, i just rebuilt my motor so i'm still breaking it in and not going over 3k rpm but i would thing problems may come faster at higher rpm's

[tru]

Hi!

I have like 2 or 3 ca16de engine in pieces in my garage, so if you'r looking for something like water pump pulley and crank pulley I may have 1 or 2 for sure!

[nextlevel]

tru I also need a fwd water pump pulley, e-mail me at [email protected], if the CA16 will fit CA18 and the price is right I can pay right now through paypal

[biosehnsucht]

Tru, can you measure the diameter of the pully (from top of the groove to top of the groove or just basicly furthesy distance to make it easy) and width as well as # grooves ?

I can go measure a RWD DET one in a bit and we can compare, if they match up as regards to fitting the belt then that could be a solution for the FWD on RWD self destruction.

[tru]

The diameter of the pulley from lip to lip (exterior diameter) is 5inches 3/16

The distance between 2 holes (for bolt) is 1inche 7/8 (front center of the hole to center of the hole)

Then finally it got 4 grooves for the strap like that

|_/\_/\_/\_|

| = lip_ = groove/\ = tooth

hope this will help!

[biosehnsucht]

RWD pully:

the exterior diamter is ~5 6/16 (are you sure it was 3/16 not 3/8?)

I measured 1 7/16ish for bolt-to-bolt spacing (it actually seems to be slightly off of that, but since we know the pumps interchange then the bolts must be the same).

The grooves look identical.

For the hell of it I measured the inside hole of the pully, its 1".

Assuming you specifically meant 5 3/16 then using a FWD on RWD would make the pump spin faster, which would lead to sooner cavitation at high RPM (but having no idea when it would begin normally, may not be an issue). However, this is easily within the range of belt adjustment or possibly just getting a slightly smaller belt.. but if you meant 5 3/8 (5 6/16) then it's the same outter diameter.

Interesting if they're different, as it would imply they intended to have the FWD version operate at a higher RPM UNLESS the crank pully was sized different to make up for it. Assuming it wasn't, then it might be no issue to run the pully w/ the smaller FWD pully.

[tru]

it's not 3/16 or even 3/8 finally it's 1/4 lol! sorry for the bad numbers!

[biosehnsucht]

well it might be the same depending on the accuracy of the ruler. it was hard to tell because of how it curves away if it was 3/8 or slightly more, so probably its the same if not its close enough to not matter.

so that could be the solution to the exploding water pump problem, of cousre someone has to actually test the theory by throwing a mechanical fan onto the fwd pully..