Hustler 500efi engine tear down & Build Up
#411
Rob
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
I buffed and waxed my oil pan.
![Drink](/forums/images/smilies/drink.gif)
I got port motor together,new head studs, rocker studs,oil pump, timing chain dart adjustable guide plates,they were a pain to make line up,it needs a better locking/boat system,its only got like 14 INCH pds of TQ,had to be real careful tq the rocker studs,I did pull the bottom down and the rods bearings looked good and the main 2 had a little trash/mark on them so I replaced the mains,After I got the heads back from being checked out,I was cleaning them with brake cleaner an saw were it was leaking past the seat when i sprayed on the ports,prob been ok once it was running, prob rust/carbon,so I pulled the port heads back down and re-lapped them in, I have a spring compressor,so I made sure with 104 hours the port motor is pretty fresh already,I bored and replace everything in it 4-2010,It dropped a exhaust seat,lucky it only hurt the one hole,it didn't drop a valve but was close,so I bored it did what Im doing to the starboard motor,I guess ya call it preventive maintenance, replacing all the guts and valve train etc. When I did the rebuild in 2010 I redynoed the motor on 93 with ethanol, I had thought it might of cause the seat to fall out, but the tune was still good all the way thru,it actually made more power,not sure if it was a fresh bore/rebuild or combo of it and the ethanol? prob the fresh motor because it made a half pd more boost on the dyno, 883hp.
![Drink](/forums/images/smilies/drink.gif)
I got port motor together,new head studs, rocker studs,oil pump, timing chain dart adjustable guide plates,they were a pain to make line up,it needs a better locking/boat system,its only got like 14 INCH pds of TQ,had to be real careful tq the rocker studs,I did pull the bottom down and the rods bearings looked good and the main 2 had a little trash/mark on them so I replaced the mains,After I got the heads back from being checked out,I was cleaning them with brake cleaner an saw were it was leaking past the seat when i sprayed on the ports,prob been ok once it was running, prob rust/carbon,so I pulled the port heads back down and re-lapped them in, I have a spring compressor,so I made sure with 104 hours the port motor is pretty fresh already,I bored and replace everything in it 4-2010,It dropped a exhaust seat,lucky it only hurt the one hole,it didn't drop a valve but was close,so I bored it did what Im doing to the starboard motor,I guess ya call it preventive maintenance, replacing all the guts and valve train etc. When I did the rebuild in 2010 I redynoed the motor on 93 with ethanol, I had thought it might of cause the seat to fall out, but the tune was still good all the way thru,it actually made more power,not sure if it was a fresh bore/rebuild or combo of it and the ethanol? prob the fresh motor because it made a half pd more boost on the dyno, 883hp.
#412
Rob
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
The starboard engine is coming together,I had to go back and do some more deburing after getting it back from the machine shop,it wasn't washed and was full of metal,I made sure I cleaned real good in the around the cam bearings since they were all ready installed,I checked all the bearing diameters and the block was .0005 tight,so with Clevite bearings having a tolerance of .0003 that .0005 would make a difference,also my crank is on the small side of spec.
Check of the pan with all the black stuff in it, this was from washing the dart guide plates and Comp cams steel roller rockers,Dont assume they are clean being new and look clean,I didn't think I would of got that much off them.
The starboard motor I am only reusing the crank,cam,and bare heads,everything else in New.
Check of the pan with all the black stuff in it, this was from washing the dart guide plates and Comp cams steel roller rockers,Dont assume they are clean being new and look clean,I didn't think I would of got that much off them.
The starboard motor I am only reusing the crank,cam,and bare heads,everything else in New.
#413
Rob
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
I replaced the oil pumps and bought new Moroso pick ups, just like what I had before , the new moroso pickups are junk,the screen is over hanging over the edge and looks like it needs trimming,like they may fall off or break.Ill get a picture.
#416
Platinum Member
![](https://www.offshoreonly.com/forums/images/icons/platinum_member_star.gif)
Join Date: Jul 2008
Location: Little River SC
Posts: 931
Likes: 0
Received 0 Likes
on
0 Posts
![Default](/forums/images/icons/icon1.gif)
Rob, Just would like to bring to your attention; oil pick-up. Is that a full interference fit on tube, into pump? If not; it should be tig welded the full circumference, to prevent aeration.
Iam not 100% knowledgeable, on the Moroso pickups, Stefs does mine and they require a full weld.
Mark
Iam not 100% knowledgeable, on the Moroso pickups, Stefs does mine and they require a full weld.
Mark
#418
Rob
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
Rob, Just would like to bring to your attention; oil pick-up. Is that a full interference fit on tube, into pump? If not; it should be tig welded the full circumference, to prevent aeration.
Iam not 100% knowledgeable, on the Moroso pickups, Stefs does mine and they require a full weld.
Mark
Iam not 100% knowledgeable, on the Moroso pickups, Stefs does mine and they require a full weld.
Mark
Mark thanks for the info,my machine shop installed it,not sure on it,I assume its a tight fit,the old style was tight,had to tap/hammer on,all my old ones have all have been welded all the way around,But im not sure its a air tight seal,they only put a spot on it in-case i ever wanted to take it apart and reuse the pickup.
Rob
#419
Rob
![](https://www.offshoreonly.com/forums/images/icons/prop.gif)
Thread Starter
![Default](/forums/images/icons/icon1.gif)
On The new head studs the short ones look alittle long,shoulder showing, the kit was for a reg bbc,the stud is 4.375.wonder if the nut will bottom out with the washer? I haven't tq them down yet,arp makes one .250 shorter also.I figure the washer is .125