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| | | | Joined: Oct 2002 Posts: 96 'Bolter | | 'Bolter Joined: Oct 2002 Posts: 96 | Hey guys,
Sooooooooooo....I've been building my 235 out of my 59 Apache Fleetside (you can see pictures in this month's submissions to the gallery, Tyler Bolles' 59 Apache....I'm Tyler). I didn't disassemble my engine, it was done partially by a buddy and partially by the machine shop. When I got it all back, it was a a block, and a few boxes of parts and nuts and bolts....all bejumbled. It's been a fun puzzle so far, but here's the big hangup.
For mounting the oil pump, I've narrowed it down to two screws that fit in the holes in the pump, and are round, like the holes on the outside of the block. Thing is, they have nice smooth round heads, with no slot for a hex key or anything. Like a regular bolt, oly with a round head...nothing to grip! Are these the right screws? How do I secure them? What kind of tool do I need??The shop manual makes it sound like there's only one screw, and a lock nut or something, but.....
Anyway, HELP!
Thanks!
P.S. Sorry I'm so long winded...I should just get to the point... | | | | | Joined: Mar 2001 Posts: 279 Shop Shark | | Shop Shark Joined: Mar 2001 Posts: 279 | If your oil pump has not been disassembled, you are looking for a pointed bolt that screws in from inside the block. If I remember right, it's got a 1/2" hex head (maybe a 7/16") and a lock nut of the same size on it. Look down inside the block along side where the oil pump shaft is inserted and you will find either the hole where this bolt screws in, or you'll see the bolt. The point of the bolt will go into a location on the oil pump shaft and hold it in place once it is in position. You will want to loosely attach the oil line to the pump before you tighten everything down. Once tightened, if you try to put on the oil line, you will probably find it is a very tight fit. Good luck. Hope this helps. | | | | | Joined: Mar 2001 Posts: 279 Shop Shark | | Shop Shark Joined: Mar 2001 Posts: 279 | If your oil pump has not been disassembled, you are looking for a pointed bolt that screws in from inside the block. If I remember right, it's got a 1/2" hex head (maybe a 7/16") and a lock nut of the same size on it. Look down inside the block along side where the oil pump shaft is inserted and you will find either the hole where this bolt screws in, or you'll see the bolt. The point of the bolt will go into a location on the oil pump shaft and hold it in place once it is in position. You will want to loosely attach the oil line to the pump before you tighten everything down. Once tightened, if you try to put on the oil line, you will probably find it is a very tight fit. Good luck. Hope this helps. | | | 
#6659 12/23/2002 12:50 PM | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | I know what you are talking about. The round screw heads protrude through the side of the block and are visible from the outside. The next time that I am working on my truck I can have a better look. The oil pump itself is secured as above. The hexbolt comes in from the side and lodges on the drilled out portion of the body. the hexnut then is tightened down to lock the bolt in place. | | | | | Joined: Jan 2000 Posts: 1,586 Extreme Gabster | | Extreme Gabster Joined: Jan 2000 Posts: 1,586 | If I hear you right, you took off the the oil pump support piece from the block? . The factory used those headless bolts to discourage removal, as it was line bored after being bolted on. If the piece is the original, you should be fine.You can use good quality allen head bolts,if the originals are chewed up from using a vise grips on them.Use a little sealer on the bolt heads to prevent an oil leak and some Locktite on the threads is a good idea. You need to install the distributer and the oil pump as a guide before tighting the bolts.The distributer should slide in and engage the oil pump easily without forcing it.The oil pump hold down bolt with the point gets snugged down lightly and then the locknut is tightened firmly.Overtightning the pointy pump bolt can bind the pump shaft, not good. | | | | | Joined: Mar 2002 Posts: 9,115 'Bolter | | 'Bolter Joined: Mar 2002 Posts: 9,115 | If you can get a look at the GMC manual, there is a photo of this part and its mounting on page 191 of the engine repair section. Even though the two engines are different, (Chev vs GMC), there are some common features. | | | | | Joined: Oct 2002 Posts: 96 'Bolter | | 'Bolter Joined: Oct 2002 Posts: 96 | Thanks guys....especially tony, that's what I needed to know. I didn't remove the support, they did it at the machine shop. I'll find some matching allen head bolts and that will be that.
Boy this whole engine building thing ain't so bad! | | | | | Joined: Aug 2000 Posts: 197 Member | | Member Joined: Aug 2000 Posts: 197 | Just so you know, those aren't standard bolts. They are shouldered bolts. Find the old bolts for comparison.
Jason
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