Classic G-Body Garage hey man I have a 86 cutlass supreme. It blew both headgaskets and I replaced the starter. I replaced everything but on first startup I forgot to hook up the ground to the alt bracket so it fried the neg battery terminal. Fixed that and got it to turn over. But a day later I have no power anywhere not even interior or radio. Checked fuses and they are good. Any idea to what it could be?! Thanks and love the vids Wish I had as many G body's as you haha
Check the fusable links. They are located on the harness right at the starter. They look like white cylinders in line with the wires. Test to make sure you have power going through them.
Thanks, helpful video. I have a 79 Malibu with a 3.3L / 220 CI and the radiator finally packed it in this year after 42 years. So, in goes the replacement. BTW, most reliable car I have ever owned! Oh yeah, original owner.
Hello first and foremost ur doing a great job n a big favor for most by making these videos but i think u should have made the vacum line replacement video maybe explain symptoms and causes of bad vacum lines reason being that those lines are a great factor on engine operations but as mentioned ur doing a great job n thank you
Thanks for watching and great suggestion. I can make a video on that but it will be general as each year and engine option used a different vacuum line system.
That is one nice cutty. And the 260 sounds like it has a lot of life yet. I had the 79’ Cutlass with 260 and those vacuum lines were a pain especially where I live. They was cracking/breaking plenty after just 6 years. But very good engine
A new radiator cap is a good idea as well. A faulty cap that doesn't hold pressure allows the system to boil at a lower temp than a cap that is working properly. This pressure also helps keep the coolant in a liquid state bellow the the boiling point. Air IS introduced into the system on these cars when they constantly overheat (or when the cap pressure is too low) and force the expanded coolant into the coolant recovery tank and then draw the coolant back into the system from the recovery tank. Also a faulty cap that allows the system to build too much pressure can destroy an aluminum core. The aluminum tubes can swell crushing the fins between them. This blocks airflow through the core.
Great video, thank you I have a 85 Monty with the 305. I put a new rad. Clutch fan and two new thermostats. With the thermostat in, it overheats as soon as I drive it. I can let it idle for an hour and it's fine. As soon as I start down the road it goes up to 260. Take the thermostat out of the car and it runs fine. Never gets to 110 Your thoughts
Many thanks for the answer. I just changed my thermostat. (307 Olds delta88) How do I properly bleed the coolant system? is there anything to consider?
Worth remembering that for CCC equipped G Bodies, a 160 degree thermostat may run too cool and not reach temperature enough for the carb to come off choke and mixture adjustment to lean out for normal running. I have an '86 Monte SS running the stock 195 degree thermostat down here in west central Florida, and it's running a similar plastic/ aluminum radiator that yours had (swapped in recently to replace the original leaking brass radiator). Even in the August heat it holds temp fine around 200 on the gauge, which is close to the 195 that the factory specified. Car runs fine and doesn't overheat, even in traffic.
Chas D that's great, I have a 85 Monte that runs hot every now and then no matter what temp thermostat I put in. With no thermostat in the car it won't even get to 140, even in hot summer traffic. Can't figure this one out?
I run a 195 T stat, cheapy aluminum/plastic radiator like the one that was removed, and it stays dead nuts at 195 even idling in hot summer traffic. I do not have a fan shroud, as my car was a V6 and now has a V8, but I do have a top plate. I need to get that octagonal style shroud that 307 cars had.
its a common issue with those plastic drain plug bungs on those cheap aftermarket radiators. A little lighter in weight tho ... same issue I had on a 2009 jeep liberty. I found out that it was stripped out from factory.
The car is looking great , but I noticed that your fan blade is on the clutch backwards, that made my 79 run 5 to 10 degrees warmer when sitting and idling.
Hi i just want to let you know that your videos are very helpful, i was wondering if you can make a video of the vacuum lines because i have the same car and the previous owner work on the car and mess all the vacuum lines and i can't find any information on how to fixed. Thanks
I have a 85 Cutlass supreme with a 403 olds engine. Previously I had a 307 olds in. It is overheating without driving. What kind of radiator do I need for the 403
I've got a 1985 monte carlo v6 and im new to restoring cars but are they any other car that will have the same parts as mine because where im at its hard to find anything monte.thanks new sub.
Many parts interchange between gbodys so it depends on what you are looking for. The parts the swap are all suspension and most interior. Engine parts swap but you need to keep in mind the engine you are working on. Thanks for subbing!
loosen up the accessory brackets and they slide to loosen the belts, remove belt and replace. You will need to remove the belts of any other accessory first as they are in the way. I think the AC belt is the most inner belt so the Power steering and alternator belt needs to come off as well.
Will it be the same process for an 84 cutlass supreme with a 307? And removal of trans lines, do they unscrew lefty lucy? And drain plug. Is it a screw or a latch? Thanks.
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Classic G-Body Garage hey man I have a 86 cutlass supreme. It blew both headgaskets and I replaced the starter. I replaced everything but on first startup I forgot to hook up the ground to the alt bracket so it fried the neg battery terminal. Fixed that and got it to turn over. But a day later I have no power anywhere not even interior or radio. Checked fuses and they are good. Any idea to what it could be?! Thanks and love the vids Wish I had as many G body's as you haha
Check the fusable links. They are located on the harness right at the starter. They look like white cylinders in line with the wires. Test to make sure you have power going through them.
Classic G-Body Garage thanks for the reply will do!!
Is there a video of you changing all of those vacuum lines?
my favorite car
Great video
I wish my thermastat was this easy to replace. The buick 3.8V6 is horrible to change a thermastat on in my 1987 Oldsmobile cutlass Supreme.
Will putting fans on the radiator help cool down the car temp? I got a 84 t type turbo regal hot air car
You seriously have the best tutorials out there for G Body’s. Thanks for what you do. It does not go unrecognized. Keep up the good work.
Thank you. Really appreciate that!
How do you change the thermastat on a 1987 Oldsmobile cutlass Supreme 3.8 V6.
How much coolant and water did you add total
Thanks, helpful video. I have a 79 Malibu with a 3.3L / 220 CI and the radiator finally packed it in this year after 42 years. So, in goes the replacement. BTW, most reliable car I have ever owned! Oh yeah, original owner.
That says a lot!
Hello first and foremost ur doing a great job n a big favor for most by making these videos but i think u should have made the vacum line replacement video maybe explain symptoms and causes of bad vacum lines reason being that those lines are a great factor on engine operations but as mentioned ur doing a great job n thank you
Thanks for watching and great suggestion. I can make a video on that but it will be general as each year and engine option used a different vacuum line system.
Would this be about the same for a 86 Parisienne?
pretty much.
Appreciate the clean video 🙌 Saved me a lot of hassle thanks !
Glad it helped!
Another awesome video to help my weekend project thanks man!
Happy to help!
Great information.
Glad it was helpful!
Love the car
Damn bro you need your own show on tv. Keep up the good work.
haha maybe some day....thanks for watching and your comment.
That is one nice cutty. And the 260 sounds like it has a lot of life yet. I had the 79’ Cutlass with 260 and those vacuum lines were a pain especially where I live. They was cracking/breaking plenty after just 6 years. But very good engine
Damn. I was here for the vacuum lines!
Very helpful stuff, thanks.
Great vid
Nice video
First one!!!! Yeah!!! LOL. Keep them coming. Great attention to detail. ...
A new radiator cap is a good idea as well. A faulty cap that doesn't hold pressure allows the system to boil at a lower temp than a cap that is working properly. This pressure also helps keep the coolant in a liquid state bellow the the boiling point.
Air IS introduced into the system on these cars when they constantly overheat (or when the cap pressure is too low) and force the expanded coolant into the coolant recovery tank and then draw the coolant back into the system from the recovery tank.
Also a faulty cap that allows the system to build too much pressure can destroy an aluminum core. The aluminum tubes can swell crushing the fins between them. This blocks airflow through the core.
This is true and a great tip.
Classic G-Body Garage I have a 1986 Cutlass Supreme. I need a new radiator. I was seeing which one was better, an all aluminum one or a copper one?
why downgrade the thermostat from 195 to 160? not a mechanic here. but my 81 needs a new thermostat thx
I like them to run a little cooler. Its not a downgrade.
That's also the same for all G bodys
I use a thin coat of permatex (red) on both sides of gasket to seal it.
Great video, thank you
I have a 85 Monty with the 305. I put a new rad. Clutch fan and two new thermostats. With the thermostat in, it overheats as soon as I drive it. I can let it idle for an hour and it's fine. As soon as I start down the road it goes up to 260.
Take the thermostat out of the car and it runs fine. Never gets to 110
Your thoughts
ive done my rad on my grand prix last year and did my ram this year..
I can relate to this!
Great vid! I wish I would have watched this video before I did all my work on my 84 toronado I got. Would have cut the amount of time in half
Thanks for watching!
Very nice Brian, your videos have improved a lot in quality. Also love the FB group.
why did you use a 160 thermostat and not an original 195 thermostat?
I prefer my cars to run cooler as I only drive them in the summer time.
Many thanks for the answer. I just changed my thermostat. (307 Olds delta88) How do I properly bleed the coolant system? is there anything to consider?
Worth remembering that for CCC equipped G Bodies, a 160 degree thermostat may run too cool and not reach temperature enough for the carb to come off choke and mixture adjustment to lean out for normal running. I have an '86 Monte SS running the stock 195 degree thermostat down here in west central Florida, and it's running a similar plastic/ aluminum radiator that yours had (swapped in recently to replace the original leaking brass radiator). Even in the August heat it holds temp fine around 200 on the gauge, which is close to the 195 that the factory specified. Car runs fine and doesn't overheat, even in traffic.
Chas D that's great, I have a 85 Monte that runs hot every now and then no matter what temp thermostat I put in. With no thermostat in the car it won't even get to 140, even in hot summer traffic. Can't figure this one out?
I run a 195 T stat, cheapy aluminum/plastic radiator like the one that was removed, and it stays dead nuts at 195 even idling in hot summer traffic. I do not have a fan shroud, as my car was a V6 and now has a V8, but I do have a top plate. I need to get that octagonal style shroud that 307 cars had.
Nothing wrong with that. This alum rad just had issues and I wasn't about to buy another since i have a bunch of stockers.
Can you please replace the radiator cap. Great video!
999thenewman Great suggestion but it did not need it. Thanks for your comment and for watching
What's the normal running temperature for a 1986 Pontiac Grand Prix with a 305 V8 motor
260 is a great cruiser....I really want that car.When do you anticipate it being ready for sale?
its a common issue with those plastic drain plug bungs on those cheap aftermarket radiators. A little lighter in weight tho ... same issue I had on a 2009 jeep liberty. I found out that it was stripped out from factory.
The car is looking great , but I noticed that your fan blade is on the clutch backwards, that made my 79 run 5 to 10 degrees warmer when sitting and idling.
Damn it is! I didn't even notice that. I will fix that ASAP! People who installed the new fan clutch must have done that.
Hi i just want to let you know that your videos are very helpful, i was wondering if you can make a video of the vacuum lines because i have the same car and the previous owner work on the car and mess all the vacuum lines and i can't find any information on how to fixed. Thanks
Did you check the sticker? If not I can send you a pic.
No my car doesn't have the sticker if you can send me the picuter i will really appreciate it
I have a 85 Cutlass supreme with a 403 olds engine. Previously I had a 307 olds in. It is overheating without driving. What kind of radiator do I need for the 403
3 core radiator, Make sure the fan clutch is good and correct, 160 thermostat
@@ClassicGBodyGarage
Thanks
I have a 1980 oldsmobile cutlass Supreme Brougham 4 door do you think you can do a video on it
Do you have any video of your car.i have a 1982 cutlass 4door supreme v6,3.8...
Thermostats : a 165 degree opens faster n begins to cool sooner ! Not a bad idea with aluminum replacement radiator vs copper readiator !
I've got a 1985 monte carlo v6 and im new to restoring cars but are they any other car that will have the same parts as mine because where im at its hard to find anything monte.thanks new sub.
Many parts interchange between gbodys so it depends on what you are looking for. The parts the swap are all suspension and most interior. Engine parts swap but you need to keep in mind the engine you are working on. Thanks for subbing!
hello could anyone tell me how to change ac compressor v belt on my 1988 oldsmobile cutlass supreme classic brougham thank you
loosen up the accessory brackets and they slide to loosen the belts, remove belt and replace. You will need to remove the belts of any other accessory first as they are in the way. I think the AC belt is the most inner belt so the Power steering and alternator belt needs to come off as well.
Will it be the same process for an 84 cutlass supreme with a 307? And removal of trans lines, do they unscrew lefty lucy? And drain plug. Is it a screw or a latch? Thanks.
All the same as this car. Trans lines are threaded the same as well as the drain plug.
@@ClassicGBodyGarage I had to remove my radiator shroud to install the lower trans line. Will this affect my cooling?
Clutch fan : are 78- 88 all thermal clutch or 78-80 thermal clutch / 81-88 non thermal clutch ?
all depends on options the car has. AC cars had thermo clutches.
What is the color of the paint on this car
It was repainted. Original color is Dark Clarett Metallic
Nice video
thansk!