Water Pump Impeller Repair Pieces
#61
Rennlist Member
Join Date: Jan 2006
Location: central cal
Posts: 975
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The cutter won't be removing much material, and it will easy to vacuum out- the bigger problem is getting all the shavings the impeller created- many flushings later, there will still be some in there. But, being metal, it will sink to the bottom and collect in places where the flow stagnates..I'd remove the thermostat, put the housing back on and plug a garden hose in there for some reverse-flow action and let it run till you don't see glitter in the water anymore...
After that, Don't Worry, Be Happy....
After that, Don't Worry, Be Happy....
#62
Former Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
The cutter won't be removing much material, and it will easy to vacuum out- the bigger problem is getting all the shavings the impeller created- many flushings later, there will still be some in there. But, being metal, it will sink to the bottom and collect in places where the flow stagnates..I'd remove the thermostat, put the housing back on and plug a garden hose in there for some reverse-flow action and let it run till you don't see glitter in the water anymore...
After that, Don't Worry, Be Happy....
After that, Don't Worry, Be Happy....
I'll make a piece that plugs into the water pump area and allows backflushing.
#63
Former Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Here's pictures of the cutting tool. I'm going to machine a "test block" today and see how everything actually works, before I do the "real" engine.
I'll take some pictures and post them. Rennlist can be the "keeper" of the instructions!
![Name: DSC00667.JPG
Views: 285
Size: 58.9 KB](https://rennlist.com/forums/attachments/928-forum/380873d1251226303-water-pump-impeller-repair-pieces-dsc00667.jpg)
![Name: DSC00668.JPG
Views: 293
Size: 57.5 KB](https://rennlist.com/forums/attachments/928-forum/380874d1251226303-water-pump-impeller-repair-pieces-dsc00668.jpg)
![Name: DSC00669.JPG
Views: 281
Size: 59.5 KB](https://rennlist.com/forums/attachments/928-forum/380875d1251226303-water-pump-impeller-repair-pieces-dsc00669.jpg)
I'll take some pictures and post them. Rennlist can be the "keeper" of the instructions!
![Name: DSC00667.JPG
Views: 285
Size: 58.9 KB](https://rennlist.com/forums/attachments/928-forum/380873d1251226303-water-pump-impeller-repair-pieces-dsc00667.jpg)
![Name: DSC00668.JPG
Views: 293
Size: 57.5 KB](https://rennlist.com/forums/attachments/928-forum/380874d1251226303-water-pump-impeller-repair-pieces-dsc00668.jpg)
![Name: DSC00669.JPG
Views: 281
Size: 59.5 KB](https://rennlist.com/forums/attachments/928-forum/380875d1251226303-water-pump-impeller-repair-pieces-dsc00669.jpg)
![Name: DSC00670.JPG
Views: 277
Size: 58.5 KB](https://rennlist.com/forums/attachments/928-forum/380876d1251226303-water-pump-impeller-repair-pieces-dsc00670.jpg)
#65
Not the sharpest tool in the shed
Rennlist Member
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Hell Greg, that cutter looks like it'd make a fine impeller. Why not just bolt it up, spin it a few times, flush the block and be done with it?
![evilgrin](https://rennlist.com/forums/graemlins/evilgrin.gif)
![hiha](https://rennlist.com/forums/graemlins/roflmao.gif)
![evilgrin](https://rennlist.com/forums/graemlins/evilgrin.gif)
![hiha](https://rennlist.com/forums/graemlins/roflmao.gif)
![evilgrin](https://rennlist.com/forums/graemlins/evilgrin.gif)
#67
Former Sponsor
Thread Starter
#68
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Awesome to see this approaching the finish line! Great work, Greg and Steve! ![Cheers](https://rennlist.com/forums/images/smilies/beerchug.gif)
Since I don't see a reference to it in this thread, here is a link to the thread that started this. I had suggested a guide plate at post 274, and Greg had already thought of it but was struggling with the "how". I made a suggestion a bit later that seems to have sparked some creative juices, and Steve obviously has done a fabulous job of turning the armchair theorizing into a workable concept and running with it.
Sure it needs to be proven and tweaks may be needed but Greg and Steve have really broken some new ground here IMHO.
Way to go, guys!
![Cheers](https://rennlist.com/forums/images/smilies/beerchug.gif)
Since I don't see a reference to it in this thread, here is a link to the thread that started this. I had suggested a guide plate at post 274, and Greg had already thought of it but was struggling with the "how". I made a suggestion a bit later that seems to have sparked some creative juices, and Steve obviously has done a fabulous job of turning the armchair theorizing into a workable concept and running with it.
Sure it needs to be proven and tweaks may be needed but Greg and Steve have really broken some new ground here IMHO.
Way to go, guys!
![thumbsup](https://rennlist.com/forums/graemlins/bigok.gif)
![bowdown](https://rennlist.com/forums/graemlins/bowdown.gif)
![bowdown](https://rennlist.com/forums/graemlins/bowdown.gif)
![Cheers](https://rennlist.com/forums/images/smilies/beerchug.gif)
#69
Rennlist Member
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Amazing work guys....folks on this board continue to impress the hell out of me!! Nice work Greg / Steve!
#70
Rennlist Member
Join Date: Jan 2006
Location: central cal
Posts: 975
Likes: 0
Received 0 Likes
on
0 Posts
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Kudos to you too, Dave- hope you never need the damn thing!
We need to keep poking Ed for some pics of his pump- I KNOW that was a lot of work, and I'd like to see it...wouldn't y'all?
STeve
We need to keep poking Ed for some pics of his pump- I KNOW that was a lot of work, and I'd like to see it...wouldn't y'all?
STeve
#71
Former Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Dave:
Here's pictures of your idea to make a fixture and have it bolt onto the block, in action. Great idea! Thanks for the idea/help.
![Name: DSC00671.JPG
Views: 314
Size: 60.6 KB](https://rennlist.com/forums/attachments/928-forum/381173d1251305008-water-pump-impeller-repair-pieces-dsc00671.jpg)
Cutting tool/fixture attached to block. Determine "extent of damage" beforehand and calculate thickness of "insert needed.
![Name: DSC00673.JPG
Views: 314
Size: 60.0 KB](https://rennlist.com/forums/attachments/928-forum/381174d1251305008-water-pump-impeller-repair-pieces-dsc00673.jpg)
Set "stop" to desired insert thickness.
![Name: DSC00674.JPG
Views: 287
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381175d1251305008-water-pump-impeller-repair-pieces-dsc00674.jpg)
Attach drill
![Name: DSC00675.JPG
Views: 284
Size: 59.8 KB](https://rennlist.com/forums/attachments/928-forum/381176d1251305008-water-pump-impeller-repair-pieces-dsc00675.jpg)
Begin cutting. Use lubricant. Vacuum up chips to keep tool from binding.
![Name: DSC00676.JPG
Views: 305
Size: 60.6 KB](https://rennlist.com/forums/attachments/928-forum/381177d1251305008-water-pump-impeller-repair-pieces-dsc00676.jpg)
Cut done. Check depth. If surface still has damage, repeat above, adding "next" thickness insert into calculation.
![Name: DSC00677.JPG
Views: 296
Size: 59.9 KB](https://rennlist.com/forums/attachments/928-forum/381178d1251305138-water-pump-impeller-repair-pieces-dsc00677.jpg)
Mount drilling/tapping fixture. Insert "dark" bushings into inner holes and drill.
![Name: DSC00678.JPG
Views: 281
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381179d1251305138-water-pump-impeller-repair-pieces-dsc00678.jpg)
Move "dark bushings to outer holes. Install "light" bushings, in order to tap inner holes. Drill outer holes.
![Name: DSC00679.JPG
Views: 273
Size: 61.4 KB](https://rennlist.com/forums/attachments/928-forum/381180d1251305138-water-pump-impeller-repair-pieces-dsc00679.jpg)
Tap inner holes.
![Name: DSC00680.JPG
Views: 292
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381181d1251305138-water-pump-impeller-repair-pieces-dsc00680.jpg)
Remove "dark" bushings. Insert "light bushings into outer holes and tap.
![Name: DSC00681.JPG
Views: 324
Size: 60.4 KB](https://rennlist.com/forums/attachments/928-forum/381182d1251305138-water-pump-impeller-repair-pieces-dsc00681.jpg)
Remove fixture.
![Name: DSC00682.JPG
Views: 291
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381183d1251305224-water-pump-impeller-repair-pieces-dsc00682.jpg)
Holes drilled and tapped.
![Name: DSC00683.JPG
Views: 305
Size: 60.9 KB](https://rennlist.com/forums/attachments/928-forum/381184d1251305224-water-pump-impeller-repair-pieces-dsc00683.jpg)
Install insert. Tighten screws as evenly as possible. If any screws stick up, swap with "different" screw. There is variance between screws!
![Name: DSC00684.JPG
Views: 314
Size: 60.2 KB](https://rennlist.com/forums/attachments/928-forum/381185d1251305224-water-pump-impeller-repair-pieces-dsc00684.jpg)
If any screws remain high, gently countersind hole to make screw flush.
![Name: DSC00685.JPG
Views: 317
Size: 59.5 KB](https://rennlist.com/forums/attachments/928-forum/381186d1251305224-water-pump-impeller-repair-pieces-dsc00685.jpg)
Check all screw depths
![Name: DSC00686.JPG
Views: 259
Size: 60.8 KB](https://rennlist.com/forums/attachments/928-forum/381187d1251305224-water-pump-impeller-repair-pieces-dsc00686.jpg)
Done. Ready to remove, clean, and epoxy into place. Only one screw "communicates" with "outside of block". Eventually, this will be used for a "sensor" to monitor impeller distance, for those who are interested. This will allow people to use the more "durable steel impeller", without fear of future damage, for high performance use.
Here's pictures of your idea to make a fixture and have it bolt onto the block, in action. Great idea! Thanks for the idea/help.
![Name: DSC00671.JPG
Views: 314
Size: 60.6 KB](https://rennlist.com/forums/attachments/928-forum/381173d1251305008-water-pump-impeller-repair-pieces-dsc00671.jpg)
Cutting tool/fixture attached to block. Determine "extent of damage" beforehand and calculate thickness of "insert needed.
![Name: DSC00673.JPG
Views: 314
Size: 60.0 KB](https://rennlist.com/forums/attachments/928-forum/381174d1251305008-water-pump-impeller-repair-pieces-dsc00673.jpg)
Set "stop" to desired insert thickness.
![Name: DSC00674.JPG
Views: 287
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381175d1251305008-water-pump-impeller-repair-pieces-dsc00674.jpg)
Attach drill
![Name: DSC00675.JPG
Views: 284
Size: 59.8 KB](https://rennlist.com/forums/attachments/928-forum/381176d1251305008-water-pump-impeller-repair-pieces-dsc00675.jpg)
Begin cutting. Use lubricant. Vacuum up chips to keep tool from binding.
![Name: DSC00676.JPG
Views: 305
Size: 60.6 KB](https://rennlist.com/forums/attachments/928-forum/381177d1251305008-water-pump-impeller-repair-pieces-dsc00676.jpg)
Cut done. Check depth. If surface still has damage, repeat above, adding "next" thickness insert into calculation.
![Name: DSC00677.JPG
Views: 296
Size: 59.9 KB](https://rennlist.com/forums/attachments/928-forum/381178d1251305138-water-pump-impeller-repair-pieces-dsc00677.jpg)
Mount drilling/tapping fixture. Insert "dark" bushings into inner holes and drill.
![Name: DSC00678.JPG
Views: 281
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381179d1251305138-water-pump-impeller-repair-pieces-dsc00678.jpg)
Move "dark bushings to outer holes. Install "light" bushings, in order to tap inner holes. Drill outer holes.
![Name: DSC00679.JPG
Views: 273
Size: 61.4 KB](https://rennlist.com/forums/attachments/928-forum/381180d1251305138-water-pump-impeller-repair-pieces-dsc00679.jpg)
Tap inner holes.
![Name: DSC00680.JPG
Views: 292
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381181d1251305138-water-pump-impeller-repair-pieces-dsc00680.jpg)
Remove "dark" bushings. Insert "light bushings into outer holes and tap.
![Name: DSC00681.JPG
Views: 324
Size: 60.4 KB](https://rennlist.com/forums/attachments/928-forum/381182d1251305138-water-pump-impeller-repair-pieces-dsc00681.jpg)
Remove fixture.
![Name: DSC00682.JPG
Views: 291
Size: 60.3 KB](https://rennlist.com/forums/attachments/928-forum/381183d1251305224-water-pump-impeller-repair-pieces-dsc00682.jpg)
Holes drilled and tapped.
![Name: DSC00683.JPG
Views: 305
Size: 60.9 KB](https://rennlist.com/forums/attachments/928-forum/381184d1251305224-water-pump-impeller-repair-pieces-dsc00683.jpg)
Install insert. Tighten screws as evenly as possible. If any screws stick up, swap with "different" screw. There is variance between screws!
![Name: DSC00684.JPG
Views: 314
Size: 60.2 KB](https://rennlist.com/forums/attachments/928-forum/381185d1251305224-water-pump-impeller-repair-pieces-dsc00684.jpg)
If any screws remain high, gently countersind hole to make screw flush.
![Name: DSC00685.JPG
Views: 317
Size: 59.5 KB](https://rennlist.com/forums/attachments/928-forum/381186d1251305224-water-pump-impeller-repair-pieces-dsc00685.jpg)
Check all screw depths
![Name: DSC00686.JPG
Views: 259
Size: 60.8 KB](https://rennlist.com/forums/attachments/928-forum/381187d1251305224-water-pump-impeller-repair-pieces-dsc00686.jpg)
Done. Ready to remove, clean, and epoxy into place. Only one screw "communicates" with "outside of block". Eventually, this will be used for a "sensor" to monitor impeller distance, for those who are interested. This will allow people to use the more "durable steel impeller", without fear of future damage, for high performance use.
#72
Former Sponsor
Thread Starter
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
BTW..
We're considering putting inserts into all our high performance engines, to allow us to "blueprint" the water pump impeller distances, for optimum efficency. This distance varies considerably, from block to block, pump to pump, impeller to impeller.
Wait until you see our new billet water pump!
greg brown
We're considering putting inserts into all our high performance engines, to allow us to "blueprint" the water pump impeller distances, for optimum efficency. This distance varies considerably, from block to block, pump to pump, impeller to impeller.
Wait until you see our new billet water pump!
greg brown
#73
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Greg,
So we have two billet water pumps???
I am very interested.
Roger
So we have two billet water pumps???
I am very interested.
Roger
__________________
![](https://cdn.shopify.com/s/files/1/1694/8685/files/928sRus_rennlist.png?v=1621798567)
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."![thumbsup](https://rennlist.com/forums/graemlins/bigok.gif)
![](https://cdn.shopify.com/s/files/1/1694/8685/files/928sRus_rennlist.png?v=1621798567)
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
![thumbsup](https://rennlist.com/forums/graemlins/bigok.gif)
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
![thumbsup](https://rennlist.com/forums/graemlins/bigok.gif)
#75
![Default](https://rennlist.com/forums/images/icons/icon1.gif)
Billet anything is always fun.