CMayden Posted September 12, 2020 Share Posted September 12, 2020 I have two L8 engines that I am trying to identify and any help would be appreciated. I am trying to find a water pump for engine 1, and the water pump from Engine 2 will not fit on engine 1. Engine 2 was in my 1935 coupe, and I am trying to put engine 1 in it. Engine 1 has P8WH-86643 stamped on the driver front pad and 8H216691X on the driver rear pad. It also has 514246 and 6191 (or 1619 if read upside down) are cast into the block. I thought this was a 1953 engine based on previous research, but I have a high compression head (514370) on it and my parts book does not list that part number for any Pontiac 8. Engine 2 has K8PB11044 on the driver front pad and 8-65839 on the driver rear pad. I thought this one was a 1948, but the head (512121) and water pump (509114) that are on this engine are not listed in my parts book for any Pontiac 8 either. Sorry that the pics aren’t great, I will gladly take more tomorrow if anybody can tell me what views are most helpful. Thanks in advance, Caleb Link to comment Share on other sites More sharing options...
Kornkurt Posted September 12, 2020 Share Posted September 12, 2020 Engine 1 is a '52 and engine 2 is a '48. In order to use the '48 pump on the '52 engine, you have to drill and tap a hole. It's been 30+ years since I did it, but I know it will work. Just hold the old pump to the newer block, line up what you can and you will figure it out. The casting numbers on cylinder heads are not the same as part numbers and Pontiac loved to change numbers. The head will fit. Good luck. Link to comment Share on other sites More sharing options...
CMayden Posted September 12, 2020 Author Share Posted September 12, 2020 Thanks Kurt, that was just the info I needed. I will try and find a water pump for the '52, I just wanted to make sure I was ordering for the correct year (or correct make for that matter) before I start looking since all the part and casting numbers were throwing me off. Caleb Link to comment Share on other sites More sharing options...
Kornkurt Posted September 12, 2020 Share Posted September 12, 2020 If you are putting the '52 engine in a '35. you need a '37-'48 water pump and mount it like I suggested. I have a fresh rebuilt pump @ $145 exchange. 641-648-9086 Thanks! Link to comment Share on other sites More sharing options...
CMayden Posted September 12, 2020 Author Share Posted September 12, 2020 Sorry for my ignorance, but why would I need '37-'48 water pump for that install? Link to comment Share on other sites More sharing options...
Kornkurt Posted September 12, 2020 Share Posted September 12, 2020 If you use the 49-54 pump, the shaft is too long and your fan blade will hit the radiator If the '48 engine was in your '35, it should have had the 37-48 pump on it. Post a picture and I'll tell you what it is. Link to comment Share on other sites More sharing options...
CMayden Posted September 12, 2020 Author Share Posted September 12, 2020 That makes sense. The ‘48 was in the car, but there is no radiator yet. Here is the water pump from the ‘48 Link to comment Share on other sites More sharing options...
Kornkurt Posted September 12, 2020 Share Posted September 12, 2020 Yes, that is a '48 pump. If it is good, use it, if it leaks I have a fresh rebuilt. Link to comment Share on other sites More sharing options...
CMayden Posted September 12, 2020 Author Share Posted September 12, 2020 I will let you know once I find out. Thanks again for your time and knowledge. Link to comment Share on other sites More sharing options...
Kornkurt Posted September 12, 2020 Share Posted September 12, 2020 You will probably want to rebuild the fuel pump. I have recently manufactured kits that are compatible with today's gas $74.50. 641-648-9086 Link to comment Share on other sites More sharing options...
CMayden Posted September 12, 2020 Author Share Posted September 12, 2020 The engine and all accessories for the '52 engine was rebuilt and came as an extra with the car. I'm hoping to start it next week, and if I have fuel problems I will certainly buy it. Link to comment Share on other sites More sharing options...
PONTIAC1953 Posted September 16, 2020 Share Posted September 16, 2020 a lot of times when comparing the cast in part number on the part, and the part number listed in the pontiac master parts catalog, the last number is off by 1 number. Link to comment Share on other sites More sharing options...
CMayden Posted September 20, 2020 Author Share Posted September 20, 2020 That’s exactly how mine were. Parts book was off 1 number from the casting number. Link to comment Share on other sites More sharing options...
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