whatudrivin

Not all of the original pictures describing how to do this are there anymore. Any way to restore these?

NoVector

^^^ Brad
Dwayne used Greg's tool/process. You can see it here:
http://www.dwaynesgarage.norcal928.o...k%20Repair.htm

whatudrivin

Great read. Just finished it. I'm hoping that I never have this problem but good to know there is a fix that doesn't even require the motor to be removed.

GregBBRD

Yes. Laso "pre-plastic" leak.

S4ordie

Geez we seem to have a lot issues with water pumps, at least the older, unpinned, metal impeller types. Why didn't Porsche just copy the water pump design from the early 911's? You never hear about problems from those.

dr bob

Boy have you been out of the loop! Fan bearing problems often show up suddenly when water gets in them while they are spinning.


:icon102:

blown 87

Water pumps in the early 911?
They never have problems with the water pumps on them for sure.

GregBBRD

It's a crap shoot. Pick the one you think will work and pray.

This one was a "middle version" Laso, with the bushing between the shaft and the impeller.

Rob Edwards

SeanR

I tell ya, I wish every engine I took apart was as clean and properly done as this one. I have been wanting to take a peek at the repair job but figured I'd have at least a few more years before that would happen. Ya never know when something will come up. This is just one of those things that happens and there isn't anything a person can do to prevent it.

GregBBRD

All I want to know is if you are leaving in the stock tensioner....

S4ordie

Not sure why, but that struck me as very funny.

Sean, can you tell us if the stock tensioner still had oil in it? I have a suspicion they lose their oil not long after they are r&r'd.

Gary Knox

Dan,

I agree with you regarding the oil in the tensioners. Replaced the tensioner on my '94 last month with the Porken model. A very accomplished east coast 928 repairer had never done one, so worked with me on it. He has probably done ~100 timing belt jobs in the past dozen years, and always rebuilds the tensioners. I asked him how many of the tensioners were full of oil (or even had a significant amount of oil) when he removed them. He said less than 10% had any significant oil, and probably only 1 or maybe 2 had seemed to be full of oil (excluding his own GT). My OE tensioner had been rebuilt 6 years ago when we pulled the engine and redid everything after I'd bought the car. It had about half as much oil as it should have (and was full when we did the job 6 years ago).

So - I've concluded that probably 90+ percent of all 928's out there (excluding those cars whose members are active on the 928 Forum of course!) have tensioners that are NOT functioning as designed. That is one major reason why I think the Porken tensioner is an upgrade for most 928's.

By the way, that "fluid pump" for the 911's that doesn't fail - it's an oil pump, as those engines are about equally cooled by oil as air!! And, of course essentially ALL so called air cooled 911 engines leak oil.

Cheers all, and thanks to Greg for developing such a great solution for water pump impeller incursion into the block.

Gary--

SeanR

Yes, leaving it on there. I'm just replacing the gasket and refilling it. Didn't even give Joe that option. LMAO

I laughed also and knew that question was coming. Yes, there was still oil in it, it didn't look like it had lost any.

Bill Ball

The stock tensioner should hold oil just fine after a rebuild. The gasket is a chore to get right and I've seen punctures in new boots made while re-installing the tensioner. I learned the hard way and have had to redo them. Then, of course, there is the washer, usually missing, on the end of the low-tension warning spring. Did you find that there or missing?