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I'm watching the Space X launch from earlier today. There's a little clip on the clean room activities getting the Bulgaria-1 satellite ready. Your engine looks as clean as the satellite. I'm admiring all your red markings on the bolts...indicating you have torqued them to spec, I assume. Nice.
Bertrand,
Curious, when you took the pump off, did the impeller spin freely? Any idea why the coupler let go? I would think the only reason the coupler would go like that is if the pump seized.
As per my post #60, I still regard the coupler as a maintenance item, for the reasons set out in that post. It has to be on the brink in terms of shear strength, to be able to function as intended originally, and it only stands to reason that it must degrade over time, and need replacement at some time.
Seems to me that Bertrand has found, by practical in field use, the service life of the coupler before replacement is required.
No damage to the block, still spins freely, doesn't leak, has improved bearings and seal, pinned impeller, and is truly an engineered item, seems to be a ringing endorsement for the quality. Fitting a new coupler, and having a spare in the car to fit in another 30K + km, seems like a less of a crapshoot than fitting a new Laso to me.
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Fitting a new coupler, and having a spare in the car to fit in another 30K + km, seems like a less of a crapshoot than fitting a new Laso to me.
That sounds like a plan, so I went to the web-site to see about getting a couple of couplers for my pump.
Is there a way to actually BUY stuff on that site? Maybe I need to send a message to Ed.
Bertrand,
Curious, when you took the pump off, did the impeller spin freely? Any idea why the coupler let go? I would think the only reason the coupler would go like that is if the pump seized.
The impeller was spinning freely.
The pump is not seized.
No idea why it did let go.
Originally Posted by Dave928S
As per my post #60, I still regard the coupler as a maintenance item, for the reasons set out in that post. It has to be on the brink in terms of shear strength, to be able to function as intended originally, and it only stands to reason that it must degrade over time, and need replacement at some time.
Seems to me that Bertrand has found, by practical in field use, the service life of the coupler before replacement is required.
No damage to the block, still spins freely, doesn't leak, has improved bearings and seal, pinned impeller, and is truly an engineered item, seems to be a ringing endorsement for the quality. Fitting a new coupler, and having a spare in the car to fit in another 30K + km, seems like a less of a crapshoot than fitting a new Laso to me.
Dave,
Just to be clear here (mentioned this in post #66),
When I removed the pump in 2014 (for a belt change), per Ed recommandation I checked if there was any play in the impeller bearing. There wasn't any. He kindly offered me to send me a new coupler and a new pulley cover (new design). The pump had maybe about 20k km on it at that time. I put since 2014 maybe 15k km on the new coupler.
Dave,
Just to be clear here (mentioned this in post #66),
When I removed the pump in 2014 (for a belt change), per Ed recommandation I checked if there was any play in the impeller bearing. There wasn't any. He kindly offered me to send me a new coupler and a new pulley cover (new design). The pump had maybe about 20k km on it at that time. I put since 2014 maybe 15k km on the new coupler.
Thanks.
Thanks for clarifying that. I was under the mistaken impression that you'd got 35k km out of it after checking (didn't realise that you'd replaced) at 20k km, not 20 k km for the first and 15k km for the second. That puts a different spin on the whole discussion, and gives need for an answer as to why you've had a diminishing and unsatisfactory life out of the couplers. I viewed 35 as OK but 20 & 15 is clearly not long enough or consistent.
Polecat has one of Eds pumps fitted ... I'd be interested to hear how many miles he has on his.
Thanks for clarifying that. I was under the mistaken impression that you'd got 35k km out of it after checking (didn't realise that you'd replaced) at 20k km, not 20 k km for the first and 15k km for the second. That puts a different spin on the whole discussion, and gives need for an answer as to why you've had a diminishing and unsatisfactory life out of the couplers. I viewed 35 as OK but 20 & 15 is clearly not long enough or consistent.
Polecat has one of Eds pumps fitted ... I'd be interested to hear how many miles he has on his.
Dave, I'm in Texas working in the oil patch, so I can't tell ya how many miles are on my pump. But for the record, I don't do much city driving with my 928. Mostly long distance trips. I've never had any type of problem with my pump, or Ken's tensioner. I now have Victor's VCB Engineering, stage 1 supercharger installed.
When I get back to Vegas, I need to change out the Hall and CPS sensors. I'll post the mileage then. We're heading to Spokane, for Parade. I'm thinking maybe I should contact Ed, and get a spare coupler. I'm guessing it can be changed out without tearing everything apart.
As far as my personal preference goes, I'll never use another water pump, other than Ed's guardian! To me replacing the coupler is just required maintenance.
When we get back from Parade, I need to do a topend refresh. I'll check the coupler then, prolly just replace it at that time. I think for the coupler to go out at 18,000 miles, is a very short life. I figured it'd last from belt change to belt change. I ain't bitching, just my opinion.
Bertrand, sorry for your recent headaches. As predicted, you are addressing it proficiently.
Can you, or others in this thread, describe as to how you change out the coupler on the Guardian unit.
Again wishing you all the best.
Bertrand, we both live where we encounter extreme temperatures. Freezing cold where you are, and furnace hot where I live. I'm sure you're car is stored during the winter, is the garage heated?
Las Vegas, gets hotter than hell, in the summer, but rarely gets below the mid 30's in the winter.
Temp, might not be a factor at all, just guessing.
06-23-2017, 10:09 PM
