I'm back home working on my old Maverick that had an engine swap done by a shop. The car has been overheating (230+ at 70mph) and I believe the water pump may be running the wrong way. The block is listed on the parts sheet from the shop as an '84 302. The part number listed for the pump is WP641. Looked it up at RockAuto and it doesn't list rotation. Heres the RockAuto link http://www.rockauto.com/catalog/moreinfo.php?pk=59114 Currently it is setup to run clockwise. The setup is a single serpentine belt running around the crank, water pump, and alternator, driving all 3 clockwise. As for cooling, its running a champion 3 row aluminum rad, 160* T-Stat, and a hayden electric fan on either side of the radiator. I know the fan setup sucks, and it will probably be the next thing to go, but I need to make sure everything else is right first to know how well/poorly the fans are working. So, which way is this waterpump intended to run?
Standard as in clockwise? Then why would it be on a 84' block? Or was the 84 block originally V pulley? I'm confused.
I guess it would depend on a number of things, is the timing cover the one for reverse rotation? Somewhere on here, there is an explanation of the differences, but I can't find it. Have any pictures of your water pump? most reverse pumps look different compared to the old style standard. Why 2 fans? are they fighting each other?
I couldn't find the explanation either. I know I've seen it here before. As for the timing chain cover, I can't tell. And the fans are one pusher and one puller. I didn't do it. The shop did it, and I don't like it.
All I can find is WP641 is an aluminum standard rotation water pump. If you google Ford wp 641 it lists some forum threads you might be able to translate into something useful. 84 lincoln mkvII shows an aluminum standard rotation pump. WP641. Comes up on a few 5.0 sites. Sounds like a common way to get a cheap/new alum. standard (clockwise) pump. Not sure as far as the timing cover goes. Someone else will have to answer that one. I assume if its the 84 cover then it matches the pump and engine from what I found on the pump. You may find your V-belt pulley is shimmed due to the alum water pump housing.
The only way that I know of is to pull the water pump. If it has round ports its reverse. And D ports is standard rotation.
Sorry??? Whats the specs on the motor. Compression,timing, etc.... Got to be a reason its overheating. That rad should cool it at HWY speed without any fans. I could see the fans being an issue at lower speeds. The fact you say its HWY rules out the fans for me.
I agree on the fans not being a factor at highway speeds. Unfortunately I don't have any specs on the motor. Its a crate motor and I had nothing to do with the swap. The car is my old Mav that now belongs to my Dad, and the guy with better details on the swap is in Kuwait. I'm only down on vacation, so I'm not going to put tons of energy into it, just wanted to see if its an easy fix. Its definitely not the radiator, since I've got the same one for my 302 and right now in the 30* weather I can't even get it up to operating tempature.
The lower rad hose could be sucking closed or the thermoste could be stuck closed. There is also a chance the gauge could be off.
Your setup sounds like mine. I am using an 80's style aluminum water pump, standard rotation, (clockwise), with a serpentine belt. Does yours look like the one in my picture? I got looked up mine as a late 80's crown vic, I just looked up the 84 Mark Vii and its the same pump. The later 80's Mark VII went to the H.O. motor and used a reverse pump like a mustang. I would check the lower hose like mentioned, see if its soft and if you can easily squeeze it togethor. A soft hose combined with a Thermostat that is too low could be the t-stat always open making alot of suction and collapsing the hose. I would swap in atleast a 180 t-stat. If its opening at 160 on a street car then it isnt giving the water a chance to be in the radiator long enough to be cooled down. A quick read here will help. http://www.2carpros.com/articles/how-engine-thermostat-works "If the coolant is allowed to flow too quickly through the radiator the coolant will not have time to transfer the heat it has absorbed. This will cause the engine to overheat."
As others have said,check your lower hose spring. Also get rid of the forward fan! It's probably blocking the air flow! Make sure the rear fan is pulling air through the radiator,not pushing air,and you have a shroud that covers the whole radiator! Wouldn't hurt to check your timing advance either.
if you have a stock radiator it just may not be up to the challange of keeping the motor cool. mine couldnt do it at freeway speeds no mater what i did. i put an aluminum rad in and had no more heating problems.
Radiator should be good. I've never heard of anybody running a 160 degree stat with any luck. Atleast around here.
