my 1988 GMC 7000 dump truck story

[sweetk30]

awww look its your new haert transplant . . .

[C10 - C90 Bill]

It would fit one way or another, but I don't believe any were available from the factory with one. Some of those years got the 4-53 though.

[sweetk30]

I know I got ideas floating all over in this thread .

a side from the tall deck diffrences why couldn't I just use a 454 I have ? ?

I know the tall decks were to make room for the 4th ring for extra oil control . and a few other things are different.

just hate to buy more crap I don't need / and why not use what I got in stock for years.

[b454rat]

Don't see why it wouldn't work. Might have to use the funky water pump with the weird outlet and fan location off a tall deck, but don't see why couldn't use electric fan....

[rkn463]

The regular 454 should work fine, I think the main challenge will be the bracket system. Anthing that bolted to the head and something else like the block may no longer fit because the head is farther away. It is doubtful that you could use the water pump off of the tall deck as it has to mate to the intake and block. The tall deck intake will be wider.

Still a good set of 454 brackets and I think you'll be good to go with minor modifications.

-Richard

[sweetk30]

look what showed up around 11:30 am today . . . . just fits past the lift arms on the shop lift . mirrors folded in for sure .

then after a few hr's of basic stuff the truck sneezed and blew its nose off.

after checking it over the motors is most likely junk . huge NON-coolent rust trails from head /block area on left side . 1 is the whole front face of the engine for the trail .

also tried to roll it over and it got to a point and stuck . . . that was with the battery hooked up. . . with huge pry bar it bound past ... I think few cylinders are rusted up from leak and sitting .

thanks to a local member junkyard hunting he told me a local yard 1hr east of me has a 427 tall deck create engine in a truck for cheep money . . going Tuesday to look at it and other small parts .

[sweetk30]

the baked to a crisp engine is out after tinkering with it the last few days here and there . today I dropped the manifolds back as 1 unit . then unbolted the starter and bell housing . once held with the hoist ( make sure legs are all the way out HEAVY motor ) I removed the front U-bracket mount and wiggle / jiggled / pryed her from the pins and up-out she come.

also have my eye's on a engine/tranny combo complete take out with everything on it already drop in / hookup and fire. waiting for reply on shipping price back from them .

[jdl71]

sub'd

[sweetk30]

well said screw it and undid few more items and popped tranny out also .

best time now to clean up / reseal / degrease the frame / get all ready to drop back in the hole.

p.s. its great having 2 engine hoists . . .

[Airdirect]

Wow, making good progress. Yes these parts are heavy and hard to handle. A second lift is a real blessing.

[sweetk30]

I hear ya buddy . . . . .

called on other motor/tranny combo they nock off 125 if keep tranny . . . the parts are worth more then that to me . . .

said $1150 shipped to local ( 10min drive ) terminal . drove to lot were they parted it . 125k miles . . .

lookin like this is the better way at this point since I found more carnage today ....... YES MORE DAMAGE ......... the clutch @ 66k miles is on the rivets and scorred both flywheel and pressure plate. what did they do to this thing .

hate to say it but wish I had a way to test the rear end at this point . cause if it was bad I would part it and make a BIG boy toy

[Airdirect]

Looking at the pictures, you have an Eaton 17201 or 17220 (23,000) rear end. I just changed my ring and pinion on mine from 5.29 to 4.56. My truck has a 4-53T Detroit Diesel which is governed at 2,500. With this change I now have a road speed of 67 MPH. These Eaton's are heavy duty rear ends usually found in larger trucks. I doubt anything a 366 could dish out would do any damage to this rear. The way to tell you have the heavy rear end is the axles are held in with 12 bolts (glove box will show the Eaton 17201 or 17220). Here is a link to my rear end ring and pinion replacement.

The 17220 is a later version with 32 splines, vs the earlier 16 splines, and a slightly different pinion carrier assembly.

http://67-72chevytrucks.com/vboard/s...d.php?t=729084

[Airdirect]

Could you post a good picture of your clutch fork boot? Mine is bad and I am looking for a replacement. I was wondering if it was the same as the gas engine units use.

The 4-53T Detroit Diesel with Clarke 390V 5 speed uses a "Clutch Rod Control Boot P/N 692930". The truck dealer I called said it was no longer available.

Thanks!

[rkn463]

I think picture 3 is an electronic governor.

-Richard

[sweetk30]

went and picked up the rad and pressure over flow tank today .

then motor/trans combo was ready at local ABF terminal .

next to the last parts order showed up today . just waiting on a clutch linkage piviot pin swivel .

hope to start tearing in to the stuff Thursday . going to reseal / clean the tranny first since he goes in first cause I don't have a med/heavy duty style tranny jack .

then it will be clean / reseal the engine and get ready for drop in .

[sweetk30]

dam used motor is junk . . . . . tore in to it to clean and re gasket / seal it and the carb throttle shaft was frozen ( 1st oh sh!t ) then trail of water down intake runner ( 2nd oh sh!t ) and pull plugs and #1 solid rust ( 3rd oh sh!t ) and bore scope down plug hole has shown SOLID RUST and NO FU*KING GOOD AT ALL ! ! !

then to top it off the head guy in charge has just left yesterday on a 2 week vacation out of the country . so I have to wait on a refund on my credit card . . . .

[Airdirect]

Send your original motor to the machine shop for re-bore and have the heads reworked. You will then have a new motor that is dependable.

[sweetk30]

I don't think its even going to take that . . .

pulled a valve cover and you can basicly eat off the inside of it . my buddy bore scoped the plug holes and all but 1 super clean . 1 has tinyest bit of powdered surface rust in 1 spot.

Friday its hanging on a engine stand and tearin the heads off . were going to find out the rest of the story as paul Harvey would say .

[Pvmt-Pndr]

Looking good. I'm in for the ride now

[sweetk30]

no one ride for free . . . get over here and help .

[Pvmt-Pndr]

Haha if I didn't have my own engine to pull and rebuild I'd be there as soon as I hit the lottery

[sweetk30]

back from the dead thread ......

long story for later but its ALIVE with the new engine . hooking up cooling system sunday for a full test .