Have a serious problem here. This is on an 1988 305 TBI (was TBI) I hhad the heads rebuilt nothing major just a normal valve job, replaced the TBI with and Edelbrock intake an a 4BBL. changed to HEI ignition NO MORE COMPUTER. Removed the smog pump and rerouted the belt EXACTLY AS SHOWN ON THE TECH PAGE. Now after idling for 20 minutes it runs VERY HOT. normal driving is ok city traffis is a DONT DO IT. It will run hot sitting at a traffic light. You can remove the top rad. hose and no coolant will flow (thermostat removed). Replaced the water pump. NO HELP. Now question looking at the front of the engine. which direstion should the water pump be turning? after looking at the vanes in the water pump it appears to be turning BACKWARDS. engine turns clockwise so water pump should also turn closkwise. WHATS UP HERE did I route the belt wrong for this engine?

 

The water pump should be turning counter clockwise. Sounds like you have the belt routed wrong. Route it just like factory but just skip the smog pump. Do you still have the AC? If not run the belts in FACTORY order but loop the belt overtop of the tensioner instead of under it.

This is what I did. But it does sound like you have it wrong. Plus Ive heard it will actually run hotter without a stat. Im guessing you did this just to rule out a factor?

 

routed the belt EXACTLY as in the diagram. Yeah removed the thermostat the rule it out as being faulty. With the belt routed like the diagram it is turning counterclockwise. BUT NOT pumping. Same thing as with the old pump I removed. I removed the back of the water pump according to the vanes it should turn clockwise in order to pump. ???????

 

Like said the water pump should be turning counter clockwise, maybe you were give the wrong water pump? You said you had some head work done, did you do this at the same time or is that just previously??

 

Head work has nothing to do with it pump not pumping. Only thing done to the heads were valves ground , resurfaced and valves seals. nothing else was wrong. heads checked perfect. I have tried 2 different pumps. What I need is the belt routing to turn the pump clockwise. The pump WILL NOT pump turning counterclockwise. We have checked 2 different pumps.

 

The correct pump for your car WILL work turning counter-clockwise, because that's what it's supposed to do from the factory. Look through any catalog of water pumps; you'll see "standard rotation" (clockwise) and "reverse rotation for serpentine systems" (what you have).

The head work does have something to do with the water pump, if you replaced it during the process. That's what he was asking.

AFAIK there is no way to get a serpentine belt system to turn the pump clockwise. Look at your belt routing; if the back of the belt (non-ribbed) side goes over the pump pulley, like it did from the factory, then it turns the opposite way to the way the enigne turns. Look at your factory belt routing diagram and see if the same side of the belt is contacting the water pump pulley. Or, even easier, does the water pump pulley have ribs in it? If not, then it isn't designed to go on the ribbed side of the belt.

 

Will try to explain all that was done, everything listed was done at the same time. Had a valve job done on the stock heads because of smoke on start up (valves seals bad), replaced the stock TBI intake and TBI unit with Edelbrock 2104 intake (used on 87 up heads) and quadrajet carb., replaced the computer controlled dist with an HEI ignition system. used all fel pro gaskets. Nothing else was done to the engine.

After start up ran hot (240) after app 10 minutes idle. checked thermostat ( removed) still ran hot. Removed top radiator hose at radiator started engine..NO FLOW of coolant. hmm water pump bad...replaced water pump. started engine ran hot after app 10 minutes ideling. Removed top hose again..STILL no flow of coolant. The belt is routed EXACTLY as described in the tech article and by belt routing chart on car.

BEFORE anything was done to the engine it usually ran around 170 to 190 would idle for an half an hour in traffic and never over heat.

 

It is also possible that the incorrect head gaskets may have been used. I know small block chevies are almost completely identical, but somewhere in the mid 80s, they had a slight changeover.

 

2 things:

1) Not be to a smart as$ but, did you put water in the radiator??
2) Also, I have never thought it was as easy as slappin' on a carb and HEI and taking out out the computer. The ECM controls more than just the EFI.

 

water in the radiator??? I never though of that

Now to be serious I found the problem...WRONG INTAKE MANIFOLD GASKETS. FelPro has a NEW intake gasket set that replaces the old style for 87 up. However the new style completely blocks off the back crossover in the intake NOT like the old style where the passanger side has the metal restriction tab.

Change to pre 87 intake set and back to running 160 to 180.

Thanks for all the suggestions.

 

It is almost that easy. All you need is the intake manifold, HEI distributor and a fuel pressure regulator and you can do away with TBI.

I did it on mine. Its a really easy swap and the computer only controls the EFI. I took the computer completely out of mine car..once you carb it and put on the HEI distributor you no longer need it.

 

Well, maybe someone can help me then. I have an edelbrock carb (idiot previous owner put it on) non-cc, but everything else is still stock on my 84 L69. I know I need to get an intake manifold, and HEI distributor. Problem is, I don't want to spend a whole hell of a lot of $$$. Can you guys give me any part #s? My carb is the 600, don't know it's part#.

Thanks.

 

Edelbrock part number is 2101 cost about 100 bucks. Get a dist. pre 82 I think. get ready to fabricate the linkage for the throttle and cruise.

 

Sweet! I'll pick those bad boys up and get started. I'll hit you up with any questions I got!

 

I got a brand new proform distributor with cap, coil and everything for 160$ off jegs. You can probably find a intake on the boards or on ebay for CHEAP.

Your lucky you have a mechanical fuel pump so you dont have to get a fuel pressure reg.