WTF...Water Pumps!
06-03-2009, 07:02 PM
#196
Chronic Tool Dropper
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Needs a thrust face on the other end too, or two of those combo bearings in the carrier. Remember that there's an impellor, a mechanical seal, one bll baering and one roller bearing, and the drive pulley, all on that short section of casting. Pretty impressuve getting all that in a short section. Challenge is still keeping the bearin in the right place in the housing, and going to a different bearing doesn't solve that problem by itself.
06-03-2009, 08:22 PM
#197
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Needs a thrust face on the other end too, or two of those combo bearings in the carrier. Remember that there's an impellor, a mechanical seal, one bll baering and one roller bearing, and the drive pulley, all on that short section of casting. Pretty impressuve getting all that in a short section. Challenge is still keeping the bearin in the right place in the housing, and going to a different bearing doesn't solve that problem by itself.
Regards, Hammer
06-03-2009, 10:32 PM
#198
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We're just throwing ideas and counter ideas around here. There's nothing personal going on here. Please keep thinking and posting.
06-03-2009, 11:10 PM
#199
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06-04-2009, 12:11 AM
#200
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If you've got porkensioner...
Another wacky idea. Suppose that you have the porkensioner like all upstanding citizens do. This means that you've neutered the timing belt tensions sensor.
Can you somehow use that signal input with a sensor that detects the water pump leaking? If I've understood this business correctly, there are drain holes that will drip away coolant if the coolant has made its way to the bearing. No? (I haven't opened the water pump of my practice engine yet.) Can we use the timing belt tension sensor input with a sensor that gives the error code in case the drain hole is wet?
I don't know anything about leak sensors beyond what google just popped up:
http://www.netmotion.com/htm_files/fh_leak.htm
Can you somehow use that signal input with a sensor that detects the water pump leaking? If I've understood this business correctly, there are drain holes that will drip away coolant if the coolant has made its way to the bearing. No? (I haven't opened the water pump of my practice engine yet.) Can we use the timing belt tension sensor input with a sensor that gives the error code in case the drain hole is wet?
I don't know anything about leak sensors beyond what google just popped up:
http://www.netmotion.com/htm_files/fh_leak.htm
06-04-2009, 01:42 AM
#201
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Another wacky idea. Suppose that you have the porkensioner like all upstanding citizens do. This means that you've neutered the timing belt tensions sensor.
Can you somehow use that signal input with a sensor that detects the water pump leaking? If I've understood this business correctly, there are drain holes that will drip away coolant if the coolant has made its way to the bearing. No? (I haven't opened the water pump of my practice engine yet.) Can we use the timing belt tension sensor input with a sensor that gives the error code in case the drain hole is wet?
I don't know anything about leak sensors beyond what google just popped up:
http://www.netmotion.com/htm_files/fh_leak.htm
Can you somehow use that signal input with a sensor that detects the water pump leaking? If I've understood this business correctly, there are drain holes that will drip away coolant if the coolant has made its way to the bearing. No? (I haven't opened the water pump of my practice engine yet.) Can we use the timing belt tension sensor input with a sensor that gives the error code in case the drain hole is wet?
I don't know anything about leak sensors beyond what google just popped up:
http://www.netmotion.com/htm_files/fh_leak.htm
06-04-2009, 01:45 AM
#202
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[QUOTE=BrendanC;6619046]When you just quote one person, it looks like this in your posting window:
[.QUOTE=GregBBRD;6618835]OK, thanks. I see how that works. But how do you multiquote a single post? I've seen long posts (by one person) broken up with replies between the different paragraphs.[/QUOTE.]
(I added periods to make the tags stand out) So you are "quoted" by name in my post. But as you suggest, I may wish to address individual thoughts you expressed.
So what I personally do is Copy and past the
OK. So you just manually add the "quote" stuff and it automatically sees that as a separate "quote box".
Thanks!
[.QUOTE=GregBBRD;6618835]OK, thanks. I see how that works. But how do you multiquote a single post? I've seen long posts (by one person) broken up with replies between the different paragraphs.[/QUOTE.]
(I added periods to make the tags stand out) So you are "quoted" by name in my post. But as you suggest, I may wish to address individual thoughts you expressed.
So what I personally do is Copy and past the
Originally Posted by somebody
to the next part I want to address, and then past [`/quote] after it. The / is what makes the system know to abend the quote. Again, the ` is extra otherwise it would have quoted it.
So I can make a new one like this:
And then respond to it piece by piece.
You can subtlety rip on people by slightly changing their name IN the quote tags. Like you could make
Into:
So I can make a new one like this:
And then respond to it piece by piece.
You can subtlety rip on people by slightly changing their name IN the quote tags. Like you could make
Into:
Thanks!
06-04-2009, 01:50 AM
#203
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The only change they wanted to do was a plastic impeller when we were speaking with them. My company gave them a qoute and never heard back from them. That was months ago. This economy is probably not helping them decide to invest in any changes to their 928 water pump product.
Cheers,
Cheers,
06-04-2009, 02:30 AM
#204
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There's no reason you can't multi-purpose the tension warning circuit. PK-tensioner not required. I was thinking along these same lines the other night. However, what I was thinking of was running a wire in front of the pump pulley that it would need to eat through if it was migrating forward. One question in my mind was: when the press fit fails, how quickly does it migrate? It does no good to have the warning circuit trigger if you have a fraction of a nanosecond before the world ends.
06-04-2009, 03:15 AM
#205
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Slightly off topic but related question: Is there a way to adapt a warning circuit to the PK-Tensioner system? Is there a transition to failure or does the world just end then its too late? Been wondering about that.
06-09-2009, 03:44 AM
#207
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Well, for all of you following this thread and waiting to see what happened....
The impeller fell off...it obviously did not fall off when the car was sitting there...it fell off before that, but must have been spinning partially for quite some time...the block damage is very significant. The impeller is so loose on the shaft that you could throw it at the shaft, from 3 feet away, and 2 out of 3 times it would land on the shaft....significant wear!
That factory water pump seems like a real bargain, at FIVE times the price, right now! At least if the plastic impeller fell off, I wouldn't have a damaged block and could install a new impeller in about 2 minutes!
Crap!
BTW...all of those who have suggested that the acceleration rate of the engine is responsible for this....I've never had this happen, before....even with all the race engines I've done. Also, the "cast" impeller on the Laso pump is significantly lighter than the factory forged impeller....which should reduce the effect of inertial speed change on the pump!
Frack!
I've got pictures...just need to figure out how to post them....I'm still "picture" retarded. Brendan has expained it about 10 times to me...and I still just sit here dumbfounded...or perhaps just dumb. Right now, I'm too pissed to post them.....
The impeller fell off...it obviously did not fall off when the car was sitting there...it fell off before that, but must have been spinning partially for quite some time...the block damage is very significant. The impeller is so loose on the shaft that you could throw it at the shaft, from 3 feet away, and 2 out of 3 times it would land on the shaft....significant wear!
That factory water pump seems like a real bargain, at FIVE times the price, right now! At least if the plastic impeller fell off, I wouldn't have a damaged block and could install a new impeller in about 2 minutes!
Crap!
BTW...all of those who have suggested that the acceleration rate of the engine is responsible for this....I've never had this happen, before....even with all the race engines I've done. Also, the "cast" impeller on the Laso pump is significantly lighter than the factory forged impeller....which should reduce the effect of inertial speed change on the pump!
Frack!
I've got pictures...just need to figure out how to post them....I'm still "picture" retarded. Brendan has expained it about 10 times to me...and I still just sit here dumbfounded...or perhaps just dumb. Right now, I'm too pissed to post them.....
06-09-2009, 03:52 AM
#208
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Well I'm really sorry to hear this Greg. Just remember ... step back .... take a breath ... it's just an engine. All the best,
Heinrich
Heinrich
Well, for all of you following this thread and waiting to see what happened....
The impeller fell off...it obviously did not fall off when the car was sitting there...it fell off before that, but must have been spinning partially for quite some time...the block damage is very significant. The impeller is so loose on the shaft that you could throw it at the shaft, from 3 feet away, and 2 out of 3 times it would land on the shaft....significant wear!
That factory water pump seems like a real bargain, at FIVE times the price, right now! At least if the plastic impeller fell off, I wouldn't have a damaged block and could install a new impeller in about 2 minutes!
Crap!
BTW...all of those who have suggested that the acceleration rate of the engine is responsible for this....I've never had this happen, before....even with all the race engines I've done. Also, the "cast" impeller on the Laso pump is significantly lighter than the factory forged impeller....which should reduce the effect of inertial speed change on the pump!
Frack!
I've got pictures...just need to figure out how to post them....I'm still "picture" retarded. Brendan has expained it about 10 times to me...and I still just sit here dumbfounded...or perhaps just dumb. Right now, I'm too pissed to post them.....
The impeller fell off...it obviously did not fall off when the car was sitting there...it fell off before that, but must have been spinning partially for quite some time...the block damage is very significant. The impeller is so loose on the shaft that you could throw it at the shaft, from 3 feet away, and 2 out of 3 times it would land on the shaft....significant wear!
That factory water pump seems like a real bargain, at FIVE times the price, right now! At least if the plastic impeller fell off, I wouldn't have a damaged block and could install a new impeller in about 2 minutes!
Crap!
BTW...all of those who have suggested that the acceleration rate of the engine is responsible for this....I've never had this happen, before....even with all the race engines I've done. Also, the "cast" impeller on the Laso pump is significantly lighter than the factory forged impeller....which should reduce the effect of inertial speed change on the pump!
Frack!
I've got pictures...just need to figure out how to post them....I'm still "picture" retarded. Brendan has expained it about 10 times to me...and I still just sit here dumbfounded...or perhaps just dumb. Right now, I'm too pissed to post them.....
06-09-2009, 04:23 AM
#209
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And...
To begin to figure out the water pump problems and solutions is very tough...even tougher, when silly rumors are started....
The brand new Porsche water pumps I just received have not been sitting on a shelf, gathering German dust, for the past 20 years...having the seals turn to "bakelite". The actual castings were made late in 2005. Porsche put them on their shelf, as completed pumps late in 2008. That's a pretty fresh pump!
To begin to figure out the water pump problems and solutions is very tough...even tougher, when silly rumors are started....
The brand new Porsche water pumps I just received have not been sitting on a shelf, gathering German dust, for the past 20 years...having the seals turn to "bakelite". The actual castings were made late in 2005. Porsche put them on their shelf, as completed pumps late in 2008. That's a pretty fresh pump!
06-09-2009, 04:24 AM
#210
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