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stevens engine
PostPosted: Tue Mar 20, 2012 12:30 pm Reply with quote
DAWGTOY
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last saturday steven brought me his old mill--the one with the
homemade side inspection hole. sunday i tore it down. besides
having a broken rod and trashed crank i think i discovered
what might have caused the problem. whoever put in the
last timing chain put the wrong bolt in the oil pump (the only
one thats important) which bound up the timing chain tensioner
causing the chain to slap around grinding off most of the timing
chain guide bolts. (steel backed dual row) i think that pieces of
bolts somehow got in the # 1 rod bearings and caused the bearing
to fail breaking the rod. when the rod broke the piston must have
shot up in the cylinder and then the intake valve hit the piston
bending the valve. i've never seen a steel backed guide break
like this one--the whole mounting plate was broken off and the
guide itself was just grinding around on the timing chain.

every thing is going well on the replacement engine. the block,
head and crank are at the machine shop awaiting service.
the cam and rockers look as good as any i've ever torn down
but the valve adjustment screws will need replaced. (they are
pitted bad on the bottom). it's always good when the cam and rockers
are good cause rockers are pricey and i really don't think the
replacements are very good quality.(unless they are factory
replacements) this engine will end up being 20 over in bore size
and 10-20 over for the crank and rod bearings.
i'm gonna balance the rotating assembly and gasket match the
intake and exaust ports--polish the valves and do a mild pocket port
job. should end up being a nice stock runner.

keep in mind steven that if you want a different cam we'll
need new rockers as well. i won't put used rockers on a
new camshaft no matter how good they look. have you found
a header yet? let me know what you find.

i finished balancing the rods. they are ready to go.
new small end bushings and they all weigh within .5 gram
of each other. as soon as i know for sure what size the pistons
and rod bearings need to be i'll order the rebuild kit.
should know somthing a little later this week.


dawg



btw i got pix of all this on my camera
so you can see what i'm talkin about.

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PostPosted: Tue Mar 20, 2012 2:11 pm Reply with quote
5keepers
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Nate had a nice header for sale. The bottom flange has been cut off but that's no biggie.

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PostPosted: Wed Mar 21, 2012 8:36 am Reply with quote
DAWGTOY
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lookin for a tri y type.

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PostPosted: Wed Mar 21, 2012 7:02 pm Reply with quote
StevenK
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Thanks for the update. Sounds like the last owner made a pretty big mistake with that bolt. Makes me kinda leery about other areas of the truck.

Robert: Are these the headers you were talking about?

http://dougthorleyheaders.com/products/searchType/vehicleSearch/year/1982/make/TOYOTA/model/TRUCK/sfID1/9/sfID2/40/sfID3/39

Doesn't have a picture on the website, so I'm not sure if it is tri-y or not.

I'll go with your judgement on the cam/rockers. I really don't have the knowledge base to make that call. All I want is a good long, reliable life out of the engine. If the current cam/rockers will provide that, I'm fine with keeping them. If not, feel free to replace them.
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PostPosted: Thu Mar 22, 2012 8:58 am Reply with quote
DAWGTOY
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yea steven thats the right website--i'll get ya a part number.

last night i busted down the rocker shaft assembly.
the shafts look good---very useable they will clean up
nice. i'll soak em in gasoline --- wire brush em --- make
sure all the little oil holes are open---reasemble and let
her ride.
till i get the block and crank back thats about all i can
do. hope to hear something soon.
oh yea the front cover is in good shape, most of the time
when a chain guide breaks it eats up the cover. that
saves ya a little coin too.


dawg

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PostPosted: Thu Mar 22, 2012 12:00 pm Reply with quote
DAWGTOY
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steven the part number from thorleys website is
DTE-555y-c. ceramic coated tri y 3/8 flanges.
super nice header.


dawg

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PostPosted: Thu Mar 22, 2012 5:02 pm Reply with quote
StevenK
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DAWGTOY wrote:
steven the part number from thorleys website is
DTE-555y-c. ceramic coated tri y 3/8 flanges.
super nice header.


dawg



I assume that is the same as the THY-555Y-C. Didn't see a 'DTE'.

Robert, could you PM me your address? I'll get it ordered and shipped to ya.

Thanks!
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PostPosted: Fri Mar 23, 2012 9:02 am Reply with quote
DAWGTOY
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yea thats it.
i think i pulled that number from the
summit site.
damn nice header right there.



dawg

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PostPosted: Fri Mar 23, 2012 11:42 am Reply with quote
ORV Design and Fab
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whats the cost of that header?
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PostPosted: Fri Mar 23, 2012 11:47 am Reply with quote
DAWGTOY
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a little over $400.

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PostPosted: Mon Mar 26, 2012 12:07 pm Reply with quote
DAWGTOY
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over the weekend i disassembled the rocker shafts.
soaked everything in gas overnight. then spent a couple
hours with a brass brush, bore brushes, steel wool and
a air blower to clean em up. everything looks like new.
i'll need to get new valve adjustment studs as these
are pitted bad where they ride on the valve.
the block will be 20 over in bore size.
i'm still waiting on the crank.
slowly coming together.


dawg

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PostPosted: Tue Mar 27, 2012 9:15 am Reply with quote
DAWGTOY
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re assembled the rocker arm shafts last night.
picking up the head today.


dawg

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PostPosted: Tue Mar 27, 2012 8:29 pm Reply with quote
StevenK
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Headers are on the way to ya. Ordered on Monday from Summit.
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PostPosted: Wed Mar 28, 2012 9:19 am Reply with quote
DAWGTOY
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sweet thanks steven.
i picked up the head and crankshaft yesterday.
started on the port work on the intake side.
polished the combustion chambers.
lookin good so far.
got to pick up more abrasives today.
after i load up my rig this afternoon i'll get a little more
done on the port work.
won't be posting up any the rest of the week.



later dawg.

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PostPosted: Thu Mar 29, 2012 8:49 am Reply with quote
DAWGTOY
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last night i did the port work on the exaust side.
looks great. started polishing the intake valves.
taking pix as i go to show ya how it went.



dawg

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PostPosted: Tue Apr 03, 2012 10:36 am Reply with quote
DAWGTOY
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yesterday i picked up the rebuild kit.
includes all gaskets and seals--rod and main bearings 10 over--
new pistons and rings 20 over---timing chain and guides (steel backed
dual row). i still need an oil pump--i'll get it later.
last night i finished polishing the valves (weight balanced to within
.5 gram) weighted the pistons,rings,rods,bearings,piston pins and clips
so i have an overall weight to give the machine shop so they can
balance the crank. the block should be finished bored today.
i'll leave the front cover and valve cover with them to be cleaned
when i pick it up.
it'll be good to get the block back so i can start cleaning and painting
it. after the machine shop is finished balancing the crank i can start
assembly.
tonight i'll finish gasket matching the ports, clean, lap in the valves
and reassemble the head.
it's gettin there.


dododawg

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PostPosted: Tue Apr 03, 2012 11:15 am Reply with quote
DAWGTOY
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stephen you might want to check with summit.
i haven't got the header yet. no rush--just leting
you know.



dawg

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PostPosted: Tue Apr 03, 2012 7:51 pm Reply with quote
StevenK
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DAWGTOY wrote:
stephen you might want to check with summit.
i haven't got the header yet. no rush--just leting
you know.



dawg


Thanks for the reminder, I've been meaning to check that.

UPS shows it currently in Greensboro, NC. Should be delivered Wednesday (tomorrow).
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PostPosted: Wed Apr 04, 2012 9:56 am Reply with quote
DAWGTOY
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cool thanks for checkin on it.

lets see -- what did i do last night.not a lot to the engine work.
i did take the carb off the intake so i could clean it up well.
i finished tearing down the old block and put it in the junkyard.

i had a little help last night so we unloaded my truck, parked
the rv in it's spot and started tearing down the trailer.

seems like i did somthing else in regards to the rebuild
but it escapes me at this time.

today i pick up the block. the reassembly process begins.
i'll make sure to take plenty o pix for ya. when you come
down next time bring your laptop and you can put the pix
on there. the pix are split between two memory cards
(one ran out of space) so bring your card reader. if
you don't have one maybe we can get them straight
off the camera.


dawg

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PostPosted: Wed Apr 04, 2012 12:18 pm Reply with quote
DAWGTOY
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the old lady called & said ups just dropped off
a large box.

so i'd say the header is here.






dawg

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PostPosted: Thu Apr 05, 2012 8:45 am Reply with quote
DAWGTOY
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header is in---man what a nice piece.
pistons balanced (that took a while).
picked up block, primed and painted block.

thats all i got done last night.


stillstoveupdawg

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PostPosted: Thu Apr 05, 2012 11:17 am Reply with quote
StevenK
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Robert, is there anything you need me to send you? I thought there was, but I can't remember what it was.
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PostPosted: Thu Apr 05, 2012 11:55 am Reply with quote
DAWGTOY
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not that i can think of right now. if anything comes up i'll let ya know.

won't get much done tonight---thursday is poker night.



dawg

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PostPosted: Mon Apr 09, 2012 10:31 am Reply with quote
DAWGTOY
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lets see--what did i do over the weekend?
yard work saturday.
sunday
port matched the intake and exaust ports in the head.
laped valves.
reassembled the head.
put the pistons on the rods.
put the rings on the pistons.
chased all the boltholes in the block.

tusday i'll be gettin the crank and flywheel back
from being balanced. i'll get the rotating assembly
complete probly tues night.

lookin good.

dawg

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PostPosted: Mon Apr 09, 2012 2:18 pm Reply with quote
sgtbriangreen
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I want a puppy mill. This engine sounds like it will be bulletproof. Maybe one day mine will need refreshing......

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