|04-04-2013 11:10 AM|
|04-04-2013 08:18 AM|
It's true, most small block Chevy engines have no markings from the factory. SOMETIMES, there's a number stamped into the cap on the bolt "flat".
If they are truly the original caps from that block, it takes about 15 minutes for a machinist to "sort it out". Not complicated, but helpful to have the correct measuring tools, in this case, a bore gage, set to the housing bore size. If all the visual indicators that Bob mentions are "there", making sure everything is "round and straight" will take care of it.
|04-04-2013 07:02 AM|
main caps need help
If your engine has never been rebuilt or taken apart most likely you will have to number the main caps and the connecting rods. Use an electric engraver that you can pick up cheap. This is not done by the manufacturer. When purchasing new main bearing caps 1-4 are the same part number. When installing the new ones they have to be align bored and honed. If you get yours mixed up you might be able to take it to a machine shop for them to mic the caps and the block to get the caps back in the right position. If they can't the block will need to be align honed after the caps are installed.
|04-03-2013 05:04 PM|
The cast numbers have nothing to do with position. The small stamped numbers determine where the cap fits. If cap fits tight in register, then it most likely the correct one.
Install cap in marked position and physically look at the cross hatch pattern and any hangover into the bore. If you can feel the cap hangover into the bore, something is wrong. If the cross hatch doesn't match it's wrong. No. 4 is never in front position.
|04-03-2013 04:45 PM|
main caps need help
ok i got a 87 roller block , this has been strip down by the last owner. now heres a photo of the older of how i remove the main caps
now the top numbers on the caps are casting numbers , what is the second number for. is this for the older the caps should go on the block. lowest number being cap 1 and highest cap 4 . looks like the last cap is in the wrong place.
in this photo cap 4 is in the front and cap 1 at the back.if you look at the bottom of the caps you can see the front one has a diferent foot to the second one, like as if its for the front of the block no 1. the rest of the main caps are the same as the second one at the feet. now do you think that this cap number 4 was put in the wrong place. should it be at numer one as it also has the lowest number too.