37 rebuild revisited

[Don]

We had a good discussion awhile back on timing my 37,well got it all back togeather on start everything ready to go!WONT HIT A LICK,DOUBLE CHECKED EVERUTHING,TOOK FRONT OFF AND RT HEAD,PISTON COMES UP ,VALVES CLOSE,DIST POINTS TO NO 1....put it all back togeather ,same thing!checked
Plugs under pressure on tester good fire,only thing I could find is only had 50 lbs pressure on each cyl with oil in cyl and throttle open!did. Did notice plugs were dry new .040 oversized rings gap was checked,, very little honing on cyl,,
Should itsuck gas at 50 lbs,thought this 50 lbs might improve if could get running, STUMPED,,,,,,

[George/Maine]

There was just same problem the other day.
The crankshaft gear was on wrong backward.
This is what I think maybe your problem.
The dots should lineup.
Now what you want is the keyway to be at about 43 degs to LEFT from 12 oclock that's 3 teeth.
If it was put on backwards and put dot on other side that's 43 degs wrong.
Note there was a problem with a motors book and pic was backwards.
So look at the keyway as up top.
This problem would put 86Degs out of time.
Another test is watch the intake when it just opens, piston should be TDC.
That's my guess.

[Don]

Was reading your post,believe you had more problems than I did,anyway ,came in ,had a cup coffee,and thought a little!went back to shop,put a known good carb on,hit starter,started up so fast it scaded me,sit there and ladled just like it supposed to good oil pressure and vacuum.will put radiator on and check some more.

[supereal]

If I understand your post, you have only 50 pounds compression on all cylinders. For a good rebuild, that is about half enough.

[rotorwrench]

To get a good break in, the motor should have a way to pull power. A person can run them on a stand for a while but the cylinder walls can glaze up if it doesn't pull power during a long run. 50 psi on a compression test is kind of low if the motor has just been overhauled. Hopefully it will improve some after it goes around town a few times.

[petehoovie]

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What brand of coffee did you drink? Did you put something in it?....

[Step-down]

Valves clearance close ,lost compression . 12/14 set on cam heel .

After valve is open rotate crank around the world once for cam heel .... I just went thur this

[George/Maine]

You had no gas because the valve started to open 1/2 way down, on compression stroke it forced the gas backup, and 1/2 way up compression stock you got half compression 50lbs no gas fired nothing to fire ,down 1/2 way then exhaust .
I guess you found your problem. When it fired both valves closed. 86 degs out.

[Don]

Guess I answered my own question,,it will start and run good on only 50 lbs,still don’t understand only 50# only run it a few seconds ,,will put radiator on tomorrow and get some water going thru it and give a little more run time then ck comp, Have always heard you need a load on a engine and never did just start up motor home in winter and let idle for this reason,is it a myth or does it really hurt a engine.??

[drolston]

Installed bored stroked rebuild last Feb. Ross pistons and 3 rings. Put about 40 minutes on the test stand running up and down while dripping some MMO through the carb. Changed the oil. Then another 20 minutes or so in the car, getting things checked out, and then driving normally, some on the road and some around town. No smoke and has not burned a drop of oil. Changed oil at 500 miles and it had only darkened slightly. I used Valvoline VR1 racing oil for the zinc, - but, let's not start that discussion again.

Bottom line, - get a load on it as soon as you can, but there is no need to be paranoid about it.

[Don]

One big problem!i don’t have a vehicle to put engine in,...36 it came out of now has a 59 ab
But can always change back out,,,Have my eye on a 36 pickup that it would fit perfect then I would have a 8ba laying around that comes out of pickup,guy said it never ran very good,took a look and had 97 carb and the original dist,might help with correct carb.MERRY. CHRISTMAS

[Sid the Maineiac]

Glad to hear you got that problem fixed ! Hopefully that compression comes up and I think it will ! Merry Christmas and a very Happy New Year to you and yours ,Don !

[Don]

Nothing has the sound of a flathead especially with straight pipes!!!!Finally got it all togeather and tuned ,sounds quite as a mouse after the valve job,old fashion way,,had a little trouble with cranking speed,cleaned all cables and good engine ground fixed that..this was a engine that hadn’t run in 50 or so years,but story was it was a factory rebuilt engine before parked,of course it was stuck,but cotitall apart without destroying anything but 2 valves,..had engine boiled out and cleaned all parts then had bearings miked and crank ,cam bearings pistons etc,,..did a complete valve job,grinding seats and valves and grinding to specs.used the same bearings, with new rings,.040 over,new gaskets and we,repaired oil pan holes with JB weld ,worked great...I know your saying why go to all this trouble and not put new bearings in,,,I have a little v8 book that say to check,and if in specs,put them back in,I did!!!
This is a 37 and I used the block off plates....I know that it’s not a $5000 rebuild but I bet it runs as good and quite as if it were a hi dollar rebuild,,I LIKE IT,WISH YOU COULD HERE IT IDLE!!!!!!!

[Ggmac]

Glad you got it running . I'm starting on a rering 36 stud bore . I hope .