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> The Alien is failing!, We're gonna get him.
PorscheTom
post Apr 28 2005, 03:46 PM
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Ouch! That's some picture of damage. The grinding of the water pump gears into the block is why Porsche changed to plastic pump vanes on the later pumps. Some places would tell you to get a new block with the damage I saw in that picture. I hope it cools ok still as there will now be a clearance between the pump vanes and the block that was not there before that might affect pressurizing the system.

I've owned two 928's myself, a '86.5 S and a '78 and had enough. Someone earlier posted about the belt tension, I'm sure Rick knows all about that, but it is VERY important to these engines.

Good luck with your repair Rick!

Regards,
Tom
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redshift
post Apr 28 2005, 05:07 PM
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The level of knowledge around here makes me laugh out loud... we don't need no stinking help!

(well, I do, and that's what you are all here for... (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif))

Seems like the clearance would be an issue... hmm..


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Aaron Cox
post Apr 28 2005, 05:10 PM
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is the block going to survive???? (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

euro 928's were interferance motors right?
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jim912928
post Apr 28 2005, 05:35 PM
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Yes, euro 928 engines and all 32V 928 engines are interference. Only the US 16V engines are non-interference.
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SLITS
post Apr 28 2005, 06:01 PM
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Rich....

I just talked to our water pump expert from APC and showed him the images. He said it looks like the reman pump you installed had the impeller height set 1/32 - 1/16" to deep toward the block or the bearing was fitted to loose. With bearing failure (walking), the impeller can only move a few 32nds of an inch prior to the drive pulley hitting the bearing housing on the pump (this would limit the amount of digging into the block).

Problems... With the wear on the water pump housing, the impeller could have a tendency to cavitate due to excess clearance....watch your cooling carefully...

I didn't want to be the bearer of bad news but thought you might want this information.
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Flat VW
post Apr 28 2005, 08:38 PM
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QUOTE (jim912928 @ Apr 28 2005, 03:35 PM)
Yes, euro 928 engines and all 32V 928 engines are interference. .

What the heck is an interference engine? (IMG:http://www.914world.com/bbs2/html/emoticons/confused24.gif)


John
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jim912928
post Apr 28 2005, 08:45 PM
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John, like most 928 engines....an interference engine means the valves will hit the piston tops when they are either off (belt slips) or not moving (belt breaks) and the pistons continue to move....thus they "interfere". Always means big buckaroos!
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neo914-6
post Apr 28 2005, 09:01 PM
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QUOTE (jim912928 @ Apr 28 2005, 06:45 PM)
John, like most 928 engines....an interference engine means the valves will hit the piston tops when they are either off (belt slips) or not moving (belt breaks) and the pistons continue to move....thus they "interfere". Always means big buckaroos!

Yep, my 1st Audi V6 toasted 30 sodium filled valves. One top snapped completely off and imbedded in the head...

Rich,
you are the "man" making most "big" problems trivial...
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Joe Ricard
post Apr 28 2005, 09:02 PM
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I don't think many engines these days are non-interferance.
The block of a Euro motor 4.7L is the same as any other. The power comes from heads, Pistons, cams and intake system. In fact you could get a old 78 U.S. block 4.5L and have it bored (correctly) and be good to go. All the stroke were the same till the GTS.
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Flat VW
post Apr 28 2005, 09:44 PM
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QUOTE (jim912928 @ Apr 28 2005, 06:45 PM)
John, like most 928 engines....an interference engine means the valves will hit the piston tops when they are either off (belt slips) or not moving (belt breaks) and the pistons continue to move....thus they "interfere".   Always means big buckaroos!

ah-HA,

My sister- in-law got the "interference" lesson with a new 944,(ruby red, 87' if I remember right). She had put off the scheduled maintence (read here timing belt replacement).... (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) ended up batting her eyelashes at the service manager and got it covered under warranty... (IMG:http://www.914world.com/bbs2/html/emoticons/driving-girl.gif)
thus avoiding a BIG BILL.

I was aware of the concept but not that term.

Thanks,

John (IMG:http://www.914world.com/bbs2/html/emoticons/wavey.gif)
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Flat VW
post Apr 28 2005, 09:50 PM
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P.S. best wishes for a speeedy recovery for the alien-mobile ... (IMG:http://www.914world.com/bbs2/html/emoticons/driving.gif)

John
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Gint
post Apr 29 2005, 05:49 AM
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Damn good thing you went south Rick. 3" of snow at my house yesterday/last night, with water underneath and now sleet and ice. The mountains are much worse.

Safe travels my friend.
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Allan
post Apr 29 2005, 03:01 PM
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Any updates?
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Series9
post Apr 29 2005, 08:42 PM
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Car is fixed and he's on the way to Oklahoma City or farther if he's up for it.

Updates will follow....
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spare time toys
post Apr 29 2005, 08:46 PM
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QUOTE (914RS @ Apr 29 2005, 09:42 PM)
Car is fixed and he's on the way to Oklahoma City or farther if he's up for it.

Updates will follow....

Oak City he should come a little south and have breakfast (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) I could see what I need to see on his car that way. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)
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Howard
post Apr 29 2005, 09:14 PM
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Sounded pretty cheerful around 2pm CA time. Car sounded great.
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redshift
post Apr 29 2005, 10:19 PM
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Great job! Man, that's a fairly MAJOR problem... I am amazed at most of you guys...

(IMG:http://www.914world.com/bbs2/html/emoticons/icon8.gif) <--- green... with envy...


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iamchappy
post Apr 29 2005, 10:21 PM
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Keep her coming your almost home.
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Verruckt
post Apr 30 2005, 07:32 AM
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They are going to shut down a section of I-35 in Kansas City tonight until early sunday morning, so...
If any of you guys have Rick's cell #, ya might warn him of this...

http://www.thekansascitychannel.com/news/4...653/detail.html

He will have to get off and make a good detour to get back on I-35. Assuming that is still his route. Hopefully he will be past KC by that time. It won't be anything major, but just a heads up.
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David_S
post Apr 30 2005, 10:26 AM
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Well , I don't know how far he made it, but he left the Big Texan Steakhouse about 10:00 pm last night ! I got to meet Rick and see the Alien. Man ...that car is friggin awesome !!!!!! Had a great time, and hope the rest of the trip goes good !!!!


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