Mogans

Hi,
I'm using a new shop for my 89GT. The tech says the water pump is leaking and should be replaced, that its a 12 hour job and I'd might as well do the timing belt while he's in there if it hasn't been done recently. Does the 12 hours sound right to those of you who know?
Thanks.

Lizard928

That's probably book time.
It's not out of the question if he's rebuilding the factory tensioner.

SeanR

Yep, sounds about right to me.

Mogans

Thanks gents.

j.kenzie@sbcglobal.net

If Sean says it's OK. It's OK.
Dave

worf928

IIRC book time for belt and water pump is 11.7 hours and that assumes nothing about the tensioner.

When opining on a 928 from a distance, I generally tell folks to assume 12 to 18 hours depending upon the condition of "what's in there." 12 hours is certainly not crazy. But, it doesn't allow for tasks that might be necessary based on condition that are not part of a "standard" belt job.

worf928

A more important question to ask your tech is:

What will he be doing for a replacement pump? (Cutting to the chase: do not allow a rebuilt pump to be installed.)

Mogans

The arrangement is that I get to source the parts. Any suggestions on the water pump and lists of "as long as the tech is in there" parts I should have replaced are very welcome.

Mike Frye

Without knowing any of the history of the car I will tell you what I planned before I ever opened mine:

If you have the parts on hand, you don't have to use them but if you don't, you can bet they will be needed. If you're paying someone to do this job you don't want him to have to open everything up and then order a bunch of stuff, and then have to wait a week or two while the parts come in before putting it back together. The gears are a judgement call but if you have them you'll be covered.

Timing belt (gates, not conti)
If he doesn't have one, you'll need a flywheel lock
Porken's 32v'r timing tool and bump sticks (These didn't exist when I did mine, but I would highly recommend it for anyone doing this now)
Replace timing gears x 2
Replace oil pump gear
Replace crank gear
Water pump
rebuild/replace tensioner- new tensioner gasket, tensioner rebuild kit which includes the bushings for the rollers and some other stuff
clean/inspect front cam seals (or whatever they're called)
check condition of caps/rotors/wires while in there.
Clean/flush radiator inside and out since it's removed and sitting out anyway (if you do it that way)
Check condition of all coolant hoses
If you're going with the stock tensioner/warning system, make sure the tensioner warning system wires and plugs are all in good shape and clean.

If your tech knows 928s he'll know all of this stuff. If he told you 12 hours because he looked up the 'book' time and then padded it because he will be doing his first one, you may be in for a roller coaster ride.

Leon Speed

Getting your own parts has the advantage of ensuring good quality parts, the downside is no warranty by the tech. So if something breaks or fails, it might result in a discussion on who picks up the check.

Anyway, which tech do you have?

depami

If there are any problems after completion you can bet it will be your bill as the fault will be on the parts, not the labor. Most "good" mechanics won't allow customer supplied parts.

Bill Ball

Sorry - Duplicate

Bill Ball

How confident are you that this tech is very experienced with doing 928 timing belts and water pumps. Few are. There are many nuances to doing this procedure that are not covered in the workshop manuals.

Dwayne's tome:
http://www.dwaynesgarage.norcal928.o...0Procedure.htm

My learned-the-hardway tips:
http://www.billsworkshop.com/P928S4/...rces-noWSM.pdf

Mogans

It's a shop in Librtyville, IL called The Werk Shop. They work on Porsches, Mercedes and specialize in BMW. The tech is a guy who has been working on German cars for a long time and says he knows 928s well, but I'm not sure how to gauge that. I am not mechanical but have been hanging around this forum for a long time and he seems to know what he's talking about. The reason I asked to source my own parts is the parts counter didn't seem to have good 928 sources lined up, they tend to call the dealer, which is not good. So they told me I could source my own. I had the same arrangement when I used to go to Fabson AG in Wisconsin. I'll talk to the tech on Monday about his experience changing timing belts on the 928. Would it be crazy to have him do the water pump only? That's the immediate problem and the timing belt isn't actually due. As always, I admire and appreciate the high level of expertise and willingness to help a fellow 928'er!

Speedtoys

It would be nuts to only do the WP, considering how much of the same work you will have to do, to take care of everything else he will have his hands ON, and on his bench to do it.