EL CAMINO crying uncle. starter noise.

Ribbedroof

Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
2,900
113
Wellston, OK
Are you using the correct knurled starter bolts? And the mount brace?

Other thought...any chance the second block has been aggressively align bored?
 
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Dayzedandkonfuzed

Dayzedandkonfuzed

Master Mechanic
Feb 9, 2010
444
43
Anglemont, BC
Maybe the converter isn't seated all the way into the crank? This would cause the flex plate to bend at the bolts. Only thing I can think of...
 
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WBOWERS

WBOWERS

Not-quite-so-new-guy
Mar 7, 2018
29
3
Wayne, Michigan
Okay, when you say "another block", am I correct to believe that you swapped out one motor and dropped another motor in its place that had the same casting number on it? First thing that comes to mind is in connection with that number itself. Those castings came in both 2 and 4 bolt configurations. Had that number casting come into my possession and went to my Cars and Parts reference manual to learn what it had come from.

Quoting that specific page here, "3970010 first appeared as a casting number in 1969, as a 350 CID installed in Corvettes. It also has been used in 69 Camaros in a 302 version, 69-79 trucks, 69-79 B, G, and F bodies, and 70-72 Vettes with varying horsepower ratings." For those versions for cars and trucks listed as being 350 CID used between 69 and 79, there were both 2 and 4 bolt versions that used the same casting number. Where I am going with this is that unless you pulled the pan to take a peek at the bottom end, you have no real way of knowing what version, 2 or 4 bolt, you have.

The block number itself is of no help; it has been used in too many applications and continues to appear as a replacement service number if you order from the dealer. The only possibility that could help you is the casting date, which should tell you the year and month that the block came out of the foundry. Typically, back then, for example, if a block was casted in, say 1970 for example, it would go out to the yard and sat for a year or two to season. Then it would be brought in for final machining. So that 70 casting date would be on an engine installed into a 71 or 72 vehicle.

With all these variations, more than one version of the starter motor got used as well. Just a quick peek at that section showed me a page and a half of numbers for starters used between 69 and 79. With all this in mind, it could be your starter has the wrong Bendix housing on it meaning that the mounting bolts are just enough out of alignment that while it worked with your old motor and bolts up to your new one, the bolt holes in the replacement motor and those in the snout casting are situated just differently enough with respect to each other that the starter mis-aligns. Sounds like you may be in for a trip to the salvage yard or pickers to do some comparison shopping for another starter.
CORRECT ON THE ENGINE SWAP. BOTH BLOCKS DO CARRY THE SAME CASTING
THE BLOCK IN QUESTION HAS " V0113TBC " FOR DATE CODE BEST I CAN TELL ITS
OUT OF 79 CHEVY TRUCK. BOTH ENGINES HAVE THE OIL PANS OFF FOR COMPARISON.
JUST PUT CAR BACK UP IN THE AIR THIS PAST WEEKEND TO FIND A 1/4 "V" CHUNK MISSING
ON THE OUTER BOLT HOLE. TIME FOR A WELD FIX ON MAYBE A GOOD STUD.
 
Ribbedroof

Ribbedroof

Comic Book Super Hero
Supporting Member
Jan 4, 2009
2,900
113
Wellston, OK
JUST PUT CAR BACK UP IN THE AIR THIS PAST WEEKEND TO FIND A 1/4 "V" CHUNK MISSING
ON THE OUTER BOLT HOLE. TIME FOR A WELD FIX ON MAYBE A GOOD STUD.
This is what happens when the wrong bolts and no brace are used. Wound up scrapping the only one I ever had like that, nothing really worked well as a repair, but mine might have been worse than yours
 
pontiacgp

pontiacgp

Canadian Prime Minister
Mar 31, 2006
25,395
113
Kitchener, Ontario
CORRECT ON THE ENGINE SWAP. BOTH BLOCKS DO CARRY THE SAME CASTING
THE BLOCK IN QUESTION HAS " V0113TBC " FOR DATE CODE BEST I CAN TELL ITS
OUT OF 79 CHEVY TRUCK. BOTH ENGINES HAVE THE OIL PANS OFF FOR COMPARISON.
JUST PUT CAR BACK UP IN THE AIR THIS PAST WEEKEND TO FIND A 1/4 "V" CHUNK MISSING
ON THE OUTER BOLT HOLE. TIME FOR A WELD FIX ON MAYBE A GOOD STUD.
if you look at the link I posted the guy basically had the same problem you have, he changed the block
 
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