[bobbyj1]

Try partsamerica.com that is where I got my Cardone rebuilt water pump that had a cast impeller. I got the part number from one of the early pages of this thread

[george kujanski]

Hey, Bob send me a PM or email with your info. If I get a chance this weekend I'll give you a call regarding the spindles.

George

[2kool4u]

hi and thanks for getting back to me as quick as you did thanks a lot

[2kool4u]

hi i would very much like to know the part number for the cardone water pump with the bigger vanes or the store name or phone numberof store and what to order for my 67 gto thanks alot you can email me at 2classiccars@bellsouth.net and thanks a lot for getting back to me so quick

[Bill H]

Robert, sent you an email with the cardone water pump information. I see that they now sell ''new'' as well as remaufactured 8 bolt cast impeller pumps.

[cwolf]

Ok I read all 34 pages everything seems simple enough.I'm getting a 400 to rebuild will zero decking help it run cooler?

[David Jones]

. Had to get it off of the number after 665

[Bad Karma]

I cant say enough How great this Idea and FInd really is!!!!!!! Think about how many Engines this will save!!! Thanks Everyone This is a Great Idea!!!!!!!! PMDRACER I SALUTE YOU!!!!!!!!

[PMDRACER]

<BLOCKQUOTE class="ip-ubbcode-quote"><div class="ip-ubbcode-quote-title">quote:</div><div class="ip-ubbcode-quote-content">I cant say enough How great this Idea and FInd really is!!!!!!! Think about how many Engines this will save!!! Thanks Everyone This is a Great Idea!!!!!!!! PMDRACER I SALUTE YOU!!!!!!!! </div></BLOCKQUOTE>

Credit also has to go to George Kujanski who brought up the part about the separator plate, which I believe is also mentioned in Jim Hand's book.

[Hooter]

Add me to the list of guys this made a difference with. Changed my gap from 0.25 down to 0.100(or maybe a little less) and it dropped my temps 15 - 20 degrees. Thanks for bringing this back to the top.

[george kujanski]

Ok, you're added to the list.... where's my dollar?

George

[Hooter]

Check's in the mail George.

[george kujanski]

Not remembering the 4GC too well, I'd say the discrepancy in the jet sizes is a big clue. What do your plugs look like?

Also, post your question in the Street performance forum; perhaps one of our carb experts will respond.

George

[SD421]

Thanks George for your response. The plugs are like a whitish-brown color. I will repost on the Street Forum
-Don

[SD421]

I also wanted to say to everyone to make sure that all your exhaust manifold bolts are there & tight cause I noticed last night that one of them was missing. This will also lead to overheating. Ive ordered the cast impellar unit and will try and gets some pics of the 4 bolt waterpump with the cast versus the stamped unit. That way some of us guys with these pumps can see the difference if any too.
-Don

[hobierick]

Welllll, after reading all the posts on this topic, I still have a bit of fog on the brain. I'm finally getting my 66 GTO finished. The engine had been run a couple of times on the stand and in the car. It (surprise) seemed to get fairly hot running in the garage but I didn't really think too much about it as the carbs had not yet been set up beyond the rebuild specs. The timing had been set as well). Then I drove it down the road (less than half a mile) and back, just to see if the brakes braked, the gears geared, and the mufflers muffled. Pulled back in the garage and smelled antifreeze. Popped the hood and the temp guage (installed temporarily under the hood read 210. Unfortunately the smell was coming from a nice little stream of antifreeze gracefully arcing its way up over my pretty engine. Even more unfortunate was the source--a pinhole had sprouted in the top of the timing chain cover. Aww geez, not only a fix, but plenty of paint touch up. I found another cover from Don--our local (tidewater VA) GTO guru. I mentioned the heat and he pointed me to this forum and told me to read everythingposted.

OK, finally to the questions. The adjustment of the clearance between the pump vanes and the inner housing makes perfect sense but I run into a problem with the earlier, 8 bolt pumps. Pictures are below, but text first. Where I'm having trouble is that the divider plate and inner housing just drop into the timing chain cover (thus not being held in place by being sandwiched between the pump housing and timing chain cover as in the later, improved 11-bolt). As can be seen below,the fit is loose and, in this case varies from almost 0" to a little more than .6" which means that even when the inner housing has been "adjusted", the loose fit would seem to introduce the potential of adding that .6", thus still ending up with same low efficiency. Corrosion in both the old timing chain cover and the replacement pictured show that this varibility existed in a consistent manner with at least these two. However, the plates could be altered by bending the lips of the two output "nozzles" and deepening the dimple until the two plates are flush with the timing chain mating surface. Does that make sense? Does anyone have some input on this? Also, with only the three contact points holding the plates in place, I wonder if it would make sense to make the fit slightly high and then to allow the water pump to mash them back slightly for a tight (and unchanging) fit.

And (if you noticed all the corrosion and wondered) yes, a new divider plate and inner housing are on the way, which brings me to the other question I didn't see answered. The replacement inner housing has a round intake hole where the one pictured has an additional area cut out on the bottom between the 5 and 7 o'clock position. The various pictures on this thread show both, so the question is whether or not the replacement should be cut out to match.

Thanks for the great thread.

RickO

[hobierick]

Picture 2

[hobierick]

Picture 3. Sorry about the messed up font--had to squish the picture to get file size small enough.

[runningbwdog]

Hi,
I decided to install a WIKA thermometer in the water cross over between the heads. Here is what it looks like. I used the 1/2" NPT port for the thermostatic vacuum valve. Water temp holds at 185*F and spikes to 204*F after shutdown. I don't have the cast impeller, but did check the gap between the impeller and divider plate.
Mike

[Bad Karma]

I left some Guys out before I want to say Thanks to EVERYONE who helped and posted!

This will be the First Issue I address On my Future Macho poncho build up.