Bill Ball

Hmmm...OK. I'll talk to Jim.

JHowell37

All of this discussion makes me wonder why it seems to be so hard to get a decent water pump. My I30 has a chain driven water pump that's got 190K miles on it. Not only does it have to seal coolant in the cooling system, but it has to keep oil sealed out of it. We've got an Explorer with 235K miles and an original water pump. That thing has had a leak in the thermostat housing and for several years now, the system hasn't pressurized, yet the pump keeps moving water.

It all makes me wonder wtf is going when you have a company who does design and engineering work for other companies and yet they seem to have issues with rather basic stuff that most other companies take for granted. Now before the 928 masturbation starts, let me say that I'm quite aware of the limited production of the vehicle. But this is a water pump we're talking about here and Porsche isn't the only company that uses water pumps driven by the timing belt.

heinrich

Interesting way to put it ... but anyway, the design of the system is what causes failure. There is a LOT of stresson that thin little pump axle and pulley. And the bearings are sealed against hot coolant by a flimsy seal. Pretty unsurprising that they fail easily. And the most critical thing, the timing belt, runs on that pump too Stupid design id you ask me. Porken has been working on an electrical pump .....

Jim bailey - 928 International

Laso is a trademark of Langenhan Gmb they state in German that they are ..."Special factory for motor vehicle-spare parts" using the term "Ersatz" which in German means replacement or substitute although not necesarily with any negative conotation as it would have in English.. Roger your suppliers are probably misinformed about Laso or simply told you what they thought you wanted to hear ! . Laso is aftermarket , German made but NOT OEM... And no we do not want them back as cores.

JHowell37

Then why do you sell them? That kind of sucks if you turned in an original pump as a core when you bought the LASO. Whether it's inferior or not, it makes me skeptical of the quality if they're not going to be acceptable as cores.

heinrich

I know Jim and Mark at 928 International and I assure you they are 100% good guys. I bet $$$$ this was an anomaly and they will refund/replace immediately, no questions asked. This must be something their rebuilder overlooked as he likely got a core in that was nonstandard.

ROG100

Thanks for the update Jim and I will send back my two new Laso pumps and continue selling the rebuild units. I will order a new one from Porsche to try and see who makes them as no one seems to know.

Heinrich,
I guess one day I will be a good guy?
Roger

heinrich

**** ... I forgot one of the best guys around. OK for the record, not only is Roger Tyson an honest excellent parts supplier, but he's a bloody nice guy too

hacker-pschorr

The dealer supplied pump installed in 98 is still going strong. I've gone through about 7 timing belts and two oil pumps since then.

Now that I said that it will spring a leak on the way home.

Bill Ball

HOW TO TELL IF YOU HAVE A LASO OR PORSCHE WP ON YOUR CAR.

The LASO WP differs from the Porsche WP in a few ways, including one that should allow you to determine what is currently on your car. I recently installed a rebuilt WP and was worried that it might have been a LASO as I was subsequently sent a rebuilt LASO for another car.

Most of the pump is hidden under the center TB cover. However, the upper portion to which the spark plug cable and harness routing bracket attaches is visible.

One of the upper WP bolts is in the recess behind that bracket. Even w/o removing the bracket, if you use a flashlight and a mirror, you will be able to see the the lack of a secondary recess around the bolt and the casting mark that Porsche puts there. The LASO has the secondary recess around the bolt because the primary recess is shallower, so another way might be to measure the primary recess. The LASO is 43MM while the Porsche recess is 53MM deep.

You will also notice that the LASO is a cruder casting. If you remove the bracket bolts, you will see the lack of chamfer on the bolt holes, for one thing.

Porsche:


LASO:

heinrich

Dude how the hell did you manage to go through two pil pumps? I've never had to replace one .

pmooradian

I wouldn't assume anything regarding rebuilt water pumps. Several years ago I bought a supposed Porsche rebuilt water pump from DEVEK. When I got it home and took it out of the box to inspect it (yes, I should have done that BEFORE bringing it home) I noticed that the body of the pump was cracked where someone had apparently pried it off the last engine it was on. I took that back and got another pump, which I did inspect before leaving. There was so much play in the bearing of THAT pump I refused to take it home. I don't think it would have lasted long had I installed it. Needless to say, I left the old pump on. Now I'm not saying any of the major suppliers out there are selling junk water pumps, but it pays to inspect any rebuilt item to ensure it measures up to your standards. Even something that's supposed to be a Porsche rebuild might not be a good part.

hacker-pschorr

Damn noobs never use the search engine

https://rennlist.com/forums/928-forum/285892-has-anyone-seen-an-oil-pump-do-this-seized-pump-internally-broke-apart.html

ROG100

This raises some interesting questions in my littl mind 8>)

1) What was the problem with the Laso WP's ?
2) Was it the casting or the shaft & impeller?

I can understand not using a new Laso unit if I am to beleive the horror stories (which I have yet to see - must do a search) but why not the casting for a rebuild. Surley the rebuild process replaces the shaft and impeller with new reputable parts so should be good - yes/no?

This week I have 8 cores ready to go back for rebuild and 4 are from Australia/New Zealand, 2 are from South Africa, 1 from Germany and the other USA. 7 of them are Laso. So a pretty wide coverage. I cannot tell if they are original Laso or ANother rebuild. At this rate if the rebuilders will not accept Laso castings for some reason we will run out of rebuild cores very quickly.

Laso makes the WP for the complete 924/944/968 range as well as the Carrera, Carrera 4, Boxster & Boxster S. I need to search other forums for other horror stories.

I have ordered a Porsche pump so I can see what the real thing is like.

Adam Geist

After reading this thread, I am very concerned about the WP I installed earlier this year when doing the TB job.

The rebuilt WP I purchased (from a very reputable 928 supplier) was a rebuilt "Laso" unit with a metal impeller.

Should I remove it and replace it with a "non-Laso" rebuild, install a brand new Porsche one or live with what I installed and hope for the best?

I feel very uncomfortable at the moment.......
Adam