Ed Fenwick Posted July 23, 2005 Report Share Posted July 23, 2005 Aloha and thanks Scotty, You said in a previous post to put in some MMO and drive the hell out the engine to free a sticky lifter. I did just that, not MMO but another lifter cleaner and drove to town in 2nd gear. Punching it up to 80 then back down to 45-50 again and again. The engine is quiet as a church mouse now! The thing got real hot though, (248 f). I had to put it in neutral, turn off the air, and blip the engine to get it to cool down to 220 F. I think that it was the transmision the made the heat. Becaust of the bad head gasket, it blew out one gallon of coolant. ( it only blowes it out at temps over 215 f. If and when I get a job, I will get the gaskets replaced. Thanks again Ed Link to comment Share on other sites More sharing options...
bigjayzway Posted July 24, 2005 Report Share Posted July 24, 2005 Pretty cool eh? You beat on them, and they turn around and love you more!!!! ONLY a CADDY Life is too short to grow up! Link to comment Share on other sites More sharing options...
Scotty Posted July 24, 2005 Report Share Posted July 24, 2005 Aloha and thanks Scotty, You said in a previous post to put in some MMO and drive the hell out the engine to free a sticky lifter. I did just that, not MMO but another lifter cleaner and drove to town in 2nd gear. Punching it up to 80 then back down to 45-50 again and again. The engine is quiet as a church mouse now! The thing got real hot though, (248 f). I had to put it in neutral, turn off the air, and blip the engine to get it to cool down to 220 F. I think that it was the transmision the made the heat. Becaust of the bad head gasket, it blew out one gallon of coolant. ( it only blowes it out at temps over 215 f. If and when I get a job, I will get the gaskets replaced. Thanks again Ed Thanks Ed, we need to talk about that overheating problem. How sure are you that its a head gasket? Have you pressurized the cooling system? Mike Link to comment Share on other sites More sharing options...
Scotty Posted July 24, 2005 Report Share Posted July 24, 2005 The 4.9 is not really known for overheating. Consider this list: 1) a bad thermostat that is stuck closed or partially closed, I would buy an OEM thermostat and seal, and replace it after checking for the obvious. 2) less than a 50/50 mix of coolant 3) a bad radiator cap 4) low coolant 5) cooling system pressure loss (cracked side tanks, hose leaks, etc), pressurize system and see if it holds pressure 6) a clogged radiator 7) cooling fans not working properly or not working at all, check operation 8) debris restricting air flow, leaves, palm trees, surfers, etc 8) a hose collapsing on the suction side of the water pump, spring rots out 9) a leaky head gasket See this post that I posted to for more suggestions on a 92 Seville: http://caddyinfo.ipbhost.com/index.php?sho...ic=6681&hl=stat We have to get your Seville running cool! Link to comment Share on other sites More sharing options...
Ed Fenwick Posted July 25, 2005 Author Report Share Posted July 25, 2005 Aloha Mike, No I have not pressurized the system. Wouldn't I have to pressureize it at 230 degrees f ? A radiador shop said that there was exaust gasses in the coolant and coolant in the exaust gasses. The engine heats up to 180-185 f and holds quite well around town.(good thermostast) It is only when I stop in traffic or at lights that the temp rises. Then the coolant gets low and starts to get hot. I replaced the coolant about 100 miles ago, It was pretty and green until the first 230 f came up and then turned milky and had black sludge like stuff in it. The mix is 50-50, this is the third cap. Some form parts house, some from dealer. The tank could be cracked, that would expalin the loss of coolant but where would the ugly coolant come from? I really would be happy if it is the radiator, but...... Please let me know what you think. I tested an El Dorado the other day and it wasn't half the car my Seville is, just alot faster! Thanks Ed Link to comment Share on other sites More sharing options...
Scotty Posted July 25, 2005 Report Share Posted July 25, 2005 Sorry to hear that Ed, I didnt know you had nailed it down. I don't think I have heard many 4.9's needing head gaskets... Link to comment Share on other sites More sharing options...
WarrenJ Posted July 25, 2005 Report Share Posted July 25, 2005 I tested an El Dorado the other day and it wasn't half the car my Seville is, just alot faster! HEY !! Whatchit what you say about Eldorados. Regards, Warren There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
WarrenJ Posted July 25, 2005 Report Share Posted July 25, 2005 The 4.9 is not really known for overheating. Consider this list:1) a bad thermostat that is stuck closed or partially closed, I would buy an OEM thermostat and seal, and replace it after checking for the obvious. 2) less than a 50/50 mix of coolant 3) a bad radiator cap 4) low coolant 5) cooling system pressure loss (cracked side tanks, hose leaks, etc), pressurize system and see if it holds pressure 6) a clogged radiator 7) cooling fans not working properly or not working at all, check operation 8) debris restricting air flow, leaves, palm trees, surfers, etc 8) a hose collapsing on the suction side of the water pump, spring rots out 9) a leaky head gasket See this post that I posted to for more suggestions on a 92 Seville: http://caddyinfo.ipbhost.com/index.php?sho...ic=6681&hl=stat We have to get your Seville running cool! I guess we'll call this "Scotty's List." Could make a movie of it? re: #8(a), ROTFLMAO! Regards, Warren There is no means of avoiding the final collapse of a boom brought about by credit expansion. The alternative is only whether the crisis should come sooner as the result of a voluntary abandonment of further credit expansion, or later as a final and total catastrophe of the currency system involved. - Ludwig von Mises Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 18, 2008 Report Share Posted March 18, 2008 The 4.9 is not really known for overheating. Consider this list: 1) a bad thermostat that is stuck closed or partially closed, I would buy an OEM thermostat and seal, and replace it after checking for the obvious. 2) less than a 50/50 mix of coolant 3) a bad radiator cap 4) low coolant 5) cooling system pressure loss (cracked side tanks, hose leaks, etc), pressurize system and see if it holds pressure 6) a clogged radiator 7) cooling fans not working properly or not working at all, check operation 8) debris restricting air flow, leaves, palm trees, surfers, etc 8) a hose collapsing on the suction side of the water pump, spring rots out 9) a leaky head gasket See this post that I posted to for more suggestions on a 92 Seville: <a href="http://caddyinfo.ipbhost.com/index.php?sho...ic=6681&hl=stat" target="_blank">http://caddyinfo.ipbhost.com/index.php?sho...681&hl=stat</a> We have to get your Seville running cool! I guess we'll call this "Scotty's List." Could make a movie of it? re: #8(a), ROTFLMAO! Regards, Warren Warren, I don't know how I missed this reply by you.... Funny, Scotty's List.... :lol: I think I was on vacation when you posted this.. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
rmac-etc Posted March 18, 2008 Report Share Posted March 18, 2008 comments disparaging to Eldo's will be dealt with, and the author's thereof assimilated. (sorry, a bit off topic ...) back to the real issue and actual helpful advice ... Link to comment Share on other sites More sharing options...
Texas Jim Posted March 18, 2008 Report Share Posted March 18, 2008 The engine heats up to 180-185 f and holds quite well around town.(good thermostast) It is only when I stop in traffic or at lights that the temp rises. Then the coolant gets low and starts to get hot. Thanks Ed This statement makes me wonder about proper cooling fan operation. They need to be checked. Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 18, 2008 Report Share Posted March 18, 2008 The engine heats up to 180-185 f and holds quite well around town.(good thermostast) It is only when I stop in traffic or at lights that the temp rises. Then the coolant gets low and starts to get hot. Thanks Ed This statement makes me wonder about proper cooling fan operation. They need to be checked. Jim, If I recall Ed's 4.9 had internal corrosion and a pulled bolt and he was unable to have a new head gasket installed. He needed to put it down.. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
Texas Jim Posted March 18, 2008 Report Share Posted March 18, 2008 Jim, If I recall Ed's 4.9 had internal corrosion and a pulled bolt and he was unable to have a new head gasket installed. He needed to put it down.. Really sorry to hear that. Link to comment Share on other sites More sharing options...
95SevilleSLS Posted March 19, 2008 Report Share Posted March 19, 2008 The thing got real hot though, (248 f). I had to put it in neutral, turn off the air, and blip the engine to get it to cool down to 220 F. I think that it was the transmision the made the heat. Be careful putting it into neutral. When you have the car in neutral, the pump for the tranny does not run so you can smoke your tranny by it getting too hot because the pump isn't running. -Dusty- - 02 Seville STS, white diamond - 93 Sixty Special, Tan with vinyl top - 79 Coupe DeVille, Tan with Tan top - 06 GMC Sierra Z71, Black - 92 Silverado C1500, black and grey - 83 Chevy K10 Silverado, Black and Grey Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 19, 2008 Report Share Posted March 19, 2008 The thing got real hot though, (248 f). I had to put it in neutral, turn off the air, and blip the engine to get it to cool down to 220 F. I think that it was the transmision the made the heat. Be careful putting it into neutral. When you have the car in neutral, the pump for the tranny does not run so you can smoke your tranny by it getting too hot because the pump isn't running. If I am not mistaken the pump runs constantly when the engine is running, in all gears, the clutches are NOT engaged Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
simplyrob Posted March 22, 2008 Report Share Posted March 22, 2008 So was the Marvel Mystery Oil placed in the Gas Tank or in the Engine Oil or Both? Link to comment Share on other sites More sharing options...
BodybyFisher Posted March 22, 2008 Report Share Posted March 22, 2008 So was the Marvel Mystery Oil placed in the Gas Tank or in the Engine Oil or Both? Ed had a stuck noisy lifter and he put it in his oil, he had a pushrod 4.9. Recently Marika had a noisy 4.9 also and the lifter noise when away. I had an occasionally lifter noise in my 4.9 also, that was noisy after a high RPM low speed romp. Pre-1995 - DTC codes OBD1 >> 1996 and newer - DTC codes OBD2 >> https://www.obd-codes.com/trouble_codes/gm/obd_codes.htm How to check for codes Caddyinfo How To Technical Archive >> http://www.caddyinfo.com/wordpress/cadillac-how-to-faq/ Cadillac History & Specifications Year by Year http://www.motorera.com/cadillac/index.htm Link to comment Share on other sites More sharing options...
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