- Posts: 886
- Thank you received: 194
cooling issue
- mikespeed35
- Offline
- ACD Club Life Member
-
Registered
CORDially Mike
Mike Huffman
Please Log in or Create an account to join the conversation.
- johnmereness
- Offline
- Moderator
-
Registered
- Posts: 767
- Thank you received: 159
JMM
Please Log in or Create an account to join the conversation.
- auburn895
- Topic Author
- Offline
- Moderator
-
Registered
- Posts: 8
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- johnmereness
- Offline
- Moderator
-
Registered
- Posts: 767
- Thank you received: 159
JMM
Please Log in or Create an account to join the conversation.
- johnmereness
- Offline
- Moderator
-
Registered
- Posts: 767
- Thank you received: 159
41 Cadillacs have shutter thermostats, though the shutter siphon is also a flow restrictor.
35 Auburn has a 160 in the head, but I have a small hole drilled in flange that allows some bypass when cold - I believe Don Wohlend recommended such for my first 851.
JMM
Please Log in or Create an account to join the conversation.
- Brad J.
- Offline
- Moderator
-
Registered
- Posts: 1
- Thank you received: 0
Thin walled hose could be a problem.
I know 40' Buicks for sure have the wire in the lower hose but they also have that thin molded hose with the wire in them. Those hoses are so flimsy they need the wire. I can't remember what the cooling system is on a 41' caddy. I'll have to dig up my 41' caddy engine and see but I thought they used shutters controlling air instead of a thermostat controlling flow.
Chuck, have you had a chance to try anything?
Please Log in or Create an account to join the conversation.
- johnmereness
- Offline
- Moderator
-
Registered
- Posts: 767
- Thank you received: 159
Also, we did not find the problem on 41 Cadillac until I ran car under load at highway speed on a dyno.
JMM
Please Log in or Create an account to join the conversation.
- RandyEma
- Offline
- Duesenberg Historian
-
Registered
- Posts: 389
- Thank you received: 90
Please Log in or Create an account to join the conversation.
- Brad J.
- Offline
- Moderator
-
Registered
- Posts: 1
- Thank you received: 0
Please Log in or Create an account to join the conversation.
- johnmereness
- Offline
- Moderator
-
Registered
- Posts: 767
- Thank you received: 159
JMM
Please Log in or Create an account to join the conversation.
- Brad J.
- Offline
- Moderator
-
Registered
- Posts: 1
- Thank you received: 0
1. Take a compression tester hose and screw it into the spark plug like you are testing the compression.
2. Run no.1 cylinder to TDC to check this cylinder.
3. Next adapt the quick disconnect end that the gage plugs into your compressed air. Sometimes it will plug right in depending on your compression tester.
4. The idea is to run about 50psi into the cylinder through the plug hole and bubbles will quickly form in the radiator if the head gasket is leaking around that cylinder. You can run more psi but try to stay under 80 or so.
You can do each cylinder but you must rotate each to top dead center so the valves are closed. Do all 8 and check the radiator each time.
Please Log in or Create an account to join the conversation.
- RandyEma
- Offline
- Duesenberg Historian
-
Registered
- Posts: 389
- Thank you received: 90
Please Log in or Create an account to join the conversation.
- silverghost
- Offline
- Premium Forum User
-
Registered
- Posts: 249
- Thank you received: 0
Water Pump main shaft seal sucking-in air.
Worn Water Pump Shaft Packing
Water Pump intake to Lower Radiator Hose sucking-in air.
Head Gasket leaking
Corroded/Rusty Cylinder Head's machined block mating surface.
Cracked Head casting water passage.
Cracked Engine Block water pasage
At NAPA , and other parts stores, you can buy a simple chemical test kit that will detect by-products of combustion in your radiator's cooling fluid. It is used to detect head gasket leakage, cracked/ corroded/rusted cylinder head castings etc.
This will help eleminate may possible problem areas.
Good Luck !
Please Log in or Create an account to join the conversation.
- auburn895
- Topic Author
- Offline
- Moderator
-
Registered
- Posts: 8
- Thank you received: 0
Thanks Chuck
Please Log in or Create an account to join the conversation.