dip stick...

hardtimes

hardtimes

Well-known member
OK, another dipstick question....
I just got an 8CM '49 merc engine. No oil, so looking at dipstick...it says '8RT'. Question: are dipsticks for 8CM / 8BA / 8RT interchangable and reliable for oil level check:confused:...
 
49-53 Ford -Merc-& Pickup are the same dipstick, 8CM/8BA/8RT same dipstick
 
I had a similar thing happen with a 56 Packard.There was NO oil stick.I made one from an old Studebaker oilstick by filling with oil,the specified amount,checking the level,then filing a line across the stick and finially stamping"full" on the stick with metal dies.
 
The dip sticks are dependent on the type of oil pan was installed. The early 49 mercury may have used an 8RT type dip stick but the parts book has a Mercury specific part number for the later 49 thru 1951 models P/N 8CM-6750-B and it is listed as 19 5/8 inches long. There were diferent lengths for all the different pans used on the 49 thru 53 engine types. The 8BA center sump pans used the 8BA-6750-A which was 18 15/32 inches long thru 1952. In 53 the truck and car dip sticks changed again.

Kerby
 
rotorwrench said:
The dip sticks are dependent on the type of oil pan was installed. The early 49 mercury may have used an 8RT type dip stick but the parts book has a Mercury specific part number for the later 49 thru 1951 models P/N 8CM-6750-B and it is listed as 19 5/8 inches long. There were diferent lengths for all the different pans used on the 49 thru 53 engine types. The 8BA center sump pans used the 8BA-6750-A which was 18 15/32 inches long thru 1952. In 53 the truck and car dip sticks changed again.

Kerby
Click to expand...

Kerby,
I just measured total length of this dipstick which is stamped: 8RT...17 7/8"
Hmm, this '49 merc has a 'truck pan' on it(seller claims). To your knowledge, does truck pan jibe with stick length here? Is there ANY benefit/reason for installing a truck pan, in you opinion? Rick
 
The early truck pan and Merc pan were both rear sump type but the truck type had a clean out hole and plate on the bottom at least till late 52. If there is no clean out then it would still have the truck type starter plate. The 53 truck had a longer deep trough than the earlier pans but the stick is 20 23/64" long so it's way out there. The Mercury pans from 49 to early 51 had three studs protruding from the bottom rear of the pan and they attached a reinforcing angle piece that helped secure the starter plate. The trucks had an attachment for the starter plate too but it was attached to the back of the pan wall. Spot welded if I remember correctly.

Hope this Helps you ID what you have. There is a pan ID thread for late flathead types on the HAMB that is with bellhousing ID information in the Tech stuff.

Kerby
 
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