New Water Pump - Leaking Immediately...
#1
Former Vendor
Thread Starter
New Water Pump - Leaking Immediately...
So my mechanic just finished an 8 hour install of a new Lasso water pump, Pork tensioner, timing belt, and everything else up front on my '89 (all from 928srus) and as soon as the engine was started it began leaking from the water pump itself. Before he tears everything off again is there something he might have missed? He is pretty confident that the pump is defective. Any thoughts would be appreciated. Installing it twice is not exactly what I budgeted for...
#2
Rennlist Member
Ouch!! Given that the water pump is hidden behind the center belt cover, I think some tearing apart is going to be needed. There is nothing simple that can be addressed from the outside, once it is buttoned up.
If the pump seal is leaking then it will be dripping out the weep-hole under the pulley. This is the only thing I can think of that would be a defective-part problem, the rest is assembly errors.
With a PKT the shoulder bolt is not used, was that threaded hole properly plugged and sealed? (I used red loctite to seal it, back when I messed around with PKTs).
Are they sure that the pump was properly seated? I've seen some Laso pumps where the dowel-pin holes were off a bit, and the pump wouldn't seat against the gasket without reaming out one of the holes. (Again, this was some time ago, no recent experience).
If the pump seal is leaking then it will be dripping out the weep-hole under the pulley. This is the only thing I can think of that would be a defective-part problem, the rest is assembly errors.
With a PKT the shoulder bolt is not used, was that threaded hole properly plugged and sealed? (I used red loctite to seal it, back when I messed around with PKTs).
Are they sure that the pump was properly seated? I've seen some Laso pumps where the dowel-pin holes were off a bit, and the pump wouldn't seat against the gasket without reaming out one of the holes. (Again, this was some time ago, no recent experience).
#3
I'd guess that either the gasket was ripped on install or the wrench forgot to plug the hole for the roller.
#4
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#5
Rennlist Member
Similar thing happened to me on my first diy belt/wp install. I substituted the original tensioner for a pkt and did not plug the hole for the roller. Start it up and look for the leak origin. May have to put on rack to see it.
The LASO's are usually quality checked ( unless china copy).
The LASO's are usually quality checked ( unless china copy).
#6
Team Owner
To see if the weep hole is leaking,
the driver side cam cover should be removed.
To see if its leaking from the tensioner pivot,
the passenger side belt cover must be removed.
Since a modification to the belt run was made, that deleted the tensioner
I would inspect the tensioner pivot first as that involves the pivot .
the driver side cam cover should be removed.
To see if its leaking from the tensioner pivot,
the passenger side belt cover must be removed.
Since a modification to the belt run was made, that deleted the tensioner
I would inspect the tensioner pivot first as that involves the pivot .
#7
Rennlist Member
It's obviously a guess, but I agree with Stan (duh!). Suspect the nonplugged hole vs. WP.
Still have to remove some items, but better than if WP.
Good luck,
Dave
Still have to remove some items, but better than if WP.
Good luck,
Dave
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#8
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Sorry that you are having a problem.
I have never had a leaking Laso pump out of the box before.
As already said important to determine where the leak is.
As already said probably the tensioner hole in the WP was not plugged as per the instructions.
I have never had a leaking Laso pump out of the box before.
As already said important to determine where the leak is.
As already said probably the tensioner hole in the WP was not plugged as per the instructions.
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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."
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."
#9
Former Vendor
Thread Starter
Thank you all for all the suggestions thus far. I've been passing them along as they come in. Hopefully it's a simpler fix than pulling everything off and starting over again... We shall see.
#12
just to mention that the pass side belt cover is a comparative snap to remove. So,check whatever you can from that perspective/view first. Viewing an active leak through the aperture with the pass cover removed and engine running can be a challenge, but harbor freight sells a cheap boroscope that can likely give you a view down in that opening with engine running while you are out of harms way. Don't let the boroscope extended tube nick the moving timing belt
#13
Inventor
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#14
Vegas, Baby!
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There's a reason we as owners change our own water pumps and timing belt. This kind of stuff doesn't happen.
#15
Former Vendor
Thread Starter
Originally Posted by polecat702
There's a reason we as owners change our own water pumps and timing belt. This kind of stuff doesn't happen.