|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Webmaster
 
|
Yes you should check the water-pump, could be cavitating. Also made sure none of the hoses are soft and collapsing. While the water pump is out, check the distribution tube for sediment build up in the rear.
Also have you checked the timing? If the timing is off it can cause the engine to run hot. Last thing, put the a good working thermostat back in, it's supposed to be there and serves the function of getting the engine quickly up to the correct operating temperature, even in the summer. Check the overheating troubleshooting guide in the Service Manual for more options.
Posted on: 2009/8/29 13:34
|
|||
|
-BigKev
1954 Packard Clipper Deluxe Touring Sedan -> Registry | Project Blog 1937 Packard 115-C Convertible Coupe -> Registry | Project Blog |
||||
|
||||
|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Forum Ambassador
 
|
That would be a good step, particularly the water distribution tube behind the water pump. Many have reported those being severely clogged upon removal. The freeze plugs and that side of block will be a help but would do the water pump and tube first and see if improved.
Posted on: 2009/8/29 13:35
|
|||
|
||||
|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Forum Ambassador
|
Unless you know it's been done recently, on a new acquisition I'd always recommend pulling the water pump and distribution tube, inspect them, and pull a welch plug or two and flush out. But maybe first you should use a good laboratory quality glass/mercury thermometer (forget the roast beef one in the kitchen) and insert it in the radiator neck and compare that reading to the position of the gauge.
If you browse this site you'll MANY inquiries similar to yours and some of them gave very good comprehensive advice and lists of things to check; you should find and review them but here's a few things to consider: 1. Retarded ignition timing 2. Lean carburetor mixture 3. Undersize exhaust or tailpipe 4. Restrictive muffler 5. Too narrow a fan belt (rides on pulley base, not sides) 6. Blown headgasket (do a compression test) 7. Collapsing or deteriorated radiator hose, esp lower. 8. Excessive distance between fan and radiator
Posted on: 2009/8/29 13:37
|
|||
|
||||
|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Home away from home
 
|
Quote:
I do not doubt your wisdom, but do have some questions. If you had a narrower fan belt and it rode lower in the water pump pulley, would this not cause the pump to pump slightly more at a given rpm (not that i expect it to be enough to make a difference) Why would it run hotter? Also, i know these eights are strange ladies, but on most motors doesn't running a bit too advanced build heat instead of retarded? I don't doubt what you're saying, i would just like to know the why behind it, especially the fan belt. I had to use a slightly narrower one to change sizes to one that would work with my 6v pos grnd alternator i put on my 50 288.
Posted on: 2009/9/3 23:59
|
|||
|
||||
|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Forum Ambassador
|
The fan belt needs the combined surface area of both sides of the pulley plus the "wedge effect" of the V to transfer the power required for the fan and pump w/o slipping. If it rides in the bottom of the groove,yes you have a better numerical ratio, but it simply can't transfer the power.
Posted on: 2009/9/4 1:02
|
|||
|
||||
|
Re: 1948 288 wants to overheat
|
||||
|---|---|---|---|---|
|
Home away from home
|
Excellent! I'm still getting good contact to the sides. My water pump is shot, it's rattling and the pulley wobbles like crazy so it's been warmer than usual. I have a new one ready to go on, and just wanted to make sure i wasn't adding trouble with the slightly more narrow belt.
Posted on: 2009/9/4 10:11
|
|||
|
||||
