expensive

 

Is there anyone here who has done a 'Full Rebuild'?

And by that I mean something that is not a repair of a specific problem (such as TBF), and not a project resulting in a major modification.

In other words has anyone done a 'Full Rebuild' just for the hell of it?
Would anyone ever consider paying anyone else to do a 'Full Rebuild'?

 

Some could argue that it needs NEW pistons and NEW bores with New rings to be considered a rebuilt engine. You never really KNOW what the rebuild will need until it is all apart.... I KNOW of people who spent far more than $9,500 on a stock rebuild . The last new GTS engines had a sticker of about $40,000 as I recall.

 

Mr. Bailey,

As the most experienced person in the USA, could you give us your professional SWAG - how many 928 engines have been rebuilt due to wear? Not 2/6 failure, TBF failure, racing thrashing, etc.?

A raw number, a percentage, any reasonable guess?

 

Very, very few 928 engines ever wear out in normal driving . Far more common to bottom out the car and break the block at the A/C mount or drop something into the motor than wear one out. As mentioned thrust bearing failure due to preload on the flexplate , #2 , #6 rod bearing failure from being tracked and head gasket issues from boost and or neglect of the coolant are more common. Heard of a few who Hydrolocked on water from hitting deep standing water. Bottom line is 928 engines often run 200,000 miles or more with no major repairs.

 

pretty cheap! It really depends on how much stuff needes to be fixed or replaced.

Ive done most of my rebuilds with only re-ringing and checking for valve sealing. Most 928 heads and blocks are in pretty good shape, so you just do what is nessary. my rebuilds are usually only in the re-ring area, for which you just need a few of the gaskets, new rings, and some TLC.

Major rebuilds where you need a set of pistons and a block boring, is a little more. Usually, boring and treating the block is under $1000 and used pistons are not too bad in cost. re-bearing the crank with new seals and off you go.

mk

 

I am planning on pulling the engine on my GTS maybe next year and rebuilding it to eliminate the damn oil consumption. I know its typical of the GTS, but I just can't stand it.

I want to put in a hotter set of cams and Shark Tune it at that time also. Thought about stroking it, but damn, I can't afford that.

 

I did a full rebuild on my Yellow cars engine, with the exception of not replacing the pistons with new, and some of the valaves were reused as they were still good. A slightly used set of new cam chain tensioners and new Turbo cam chains, a lo milage set of lifters and S4 cams
Everything else was replaced, that also included a full valve job with new guides and a few worn valves replaced, the crank was removed and polished and the crank oil plugs were removed and the oil ways were cleaned and then the crank was drilled and tapped for new oil plugs.
The heads and the block were both surfaced. I also installed a lo mileage set of the forged rods, new rings, new main and rod bearings, all new seals all new knock,crank,hall, throttle sensors, ISV new dampers, and adjustable rate fuel pressure regulator as well as 4 hole injectors and a refurbished MAF.
Plus the intake and valve covers were also powder coated..........on and on and on.
my WAG guess is about 4500 to 6000 with me doing mostly all of the work, Though Garrity did help with torquing the heads and drilling the crank, plus a few other things.

 

were you planning on modifying the pistons?

I maybe in the market for a GTS and would rebuild regardless but lately im leaning towards just stroking the thing but who knows.

I am curious if the pistons can be pulled and simply drilled as the 5.0L pistons and am curious if this would solve the oil consumption issue.

Anyone care to comment on this procedure?

 

I guaran-damn-tee you that a 928 motor, wether it be a 16v or a 32v engine, no matter what the condition, is still cheaper than a 930 rebuild!!!!

I keep hearing how these cars are so darn expensive to maintain...blah, blah, blah!!! I am nearing the end of a rebuild/performance mods to my 930....and I am willing to bet, I have 3 to 4 times what most people would have into a full rebuild of a 928 engine.

I say that to say this..... I really am looking to get into a 928.. these are a hell of a car for the price you can get one for now a days...

 

C'mon over! I'll take the 930 off your hands.

I think what you are hearing is 928s are darn expensive to maintain at a shop or stealership. Are you doing all your own work?

 

yea, doing all my own work...well, with the help of a couple of close friends... Yea, stealership can get darn right expensive...

 

Team,

Thanks for all the input. I was merely wondering if I felt that the engine was getting "tired". Looks like what will probably happen is something will "grab" my attention...oil consumption...an odd noise, ect, ect... and then just fix that problem or whatever is found during the "fix"... Thanks again!

 

oh! BTW... on my last "run" on the tollways out here in chicago I noticed at 5k RPM my oil pressure was low..It should be reading "5" on the gauge. I checked the oil and all is full... Any ideas? The oil pressure gauge read around 4 or 4 1/2 at 5k RPM.

 

Mark at Devek, some years back, claimed he fixed the oil consumption of a GTS engine by drilling out the holes in the oil ring glands. The problem with this approach is that it requires new rods for most of the GTS's with the 1R rods. That includes mine.

My plan is to postpone that work until the 2/6 rod bearings need work or some other major problem forces me in that direction. Currently I've chosen to add a quart of oil every 900-1200 miles over the expense of a re-build.

When I do mine, I'll also do the head re-build, 968 intake valves and notch the pistons for the valves as well as re-drilling the crank.