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So I’m insanely confused. I’m working on my little project C300. My belt snapped so I bought another and that one broke too. I noticed it’s rubbing on my A/C Compressor. I can move it with my hand but there’s resistance like my clutch is engaged. I can also turn on my A/C I’m still getting cold air even without the belt being on the compressor. My freon is also full and where it’s supposed to be. Anyone have any ideas? I’m so confused lol
2 serpentine belts broken but may have been rubbing on the compressor. If the belt is hitting on anything except the pulley, it’s routed wrong.
“… can move it by hand …” Assume that’s the pulley. “… like my clutch is engaged.” The clutch may be stuck, but if the belt is hitting somewhere else, that’s pro not the problem.
”… cold air even without the belt …” That’s curious, but let’s fix the belt breaking problem.
2 serpentine belts broken but may have been rubbing on the compressor. If the belt is hitting on anything except the pulley, it’s routed wrong.
“… can move it by hand …” Assume that’s the pulley. “… like my clutch is engaged.” The clutch may be stuck, but if the belt is hitting somewhere else, that’s pro not the problem.
”… cold air even without the belt …” That’s curious, but let’s fix the belt breaking problem.
Its a 2008 sport
i was thinking it was rubbing in a bad spot but it did it both times with my newest belt i even re routed it again and still was smoking. Im thinking the clutch is stuck but i dont think i can undo it the cold air is what has me confused if i wasn’t getting any i would just replace the compressor but the belts are rubbing on the compressor because its not moving with the belts but it will move by hand maybe im not lining it up good enough
You mention youre working on and it being a project car, was it running and driving fine with the ac working when the belt snapped? I would try and free up the pulley, not sure how they work but maybe spray some penetrating oil in there. From my understanding it should spin freely with the ac not turned on. And i agree with the above, i wouldnt think about it blowing cold air until you stop breaking belts.
Yea its a project but it was running fine i had it as a daily for a bit until my GT63 came in. The i just need to figure out why its not spinning freely. Like it spins but it feels engaged it doesn’t spin if i just slightly push it. What’s weird though is without it hooked up my A/C is working like even with no belts on the car at all its pumping cold air out. So honestly i might not even hook it up again but it messes up my belt pattern
wanna know whats hilarious i bought that the first time it was too short pissed me off for about 3 hours then it broke. I’ll order another though and we’ll see 👏🏽
So i got my belt on the it will spin the compressor if I pull the belt myself but as soon as i turn the car on it doesn’t want to spin
Remove the belt and turn on the engine. Turn off the AC and make sure the clutch on the compressor spins freely. Turn on the AC and see if the compressor clutch engages. Make sure all of the other driven pulleys spin freely. From your descriptions, it sounds like one of the pulleys is frozen, which is causing the belt to break.
Remove the belt and turn on the engine. Turn off the AC and make sure the clutch on the compressor spins freely. Turn on the AC and see if the compressor clutch engages. Make sure all of the other driven pulleys spin freely. From your descriptions, it sounds like one of the pulleys is frozen, which is causing the belt to break.
Might get a headache as big as mine is. A/C is off the clutch doesn’t spin freely its engaged even when the A/C is off. All of my pulleys including my A/C compressor spins by and and by belt, but as soon as I put it on my tensioner the A/C Compressor no longer spins. So the A/C Compressor gets stuck with tension but without tension from the belt it moves freely. I turn the engine on and that pulley won’t move. Every other one does though. I’m realizing we’re all just as confused now lol
Remove the belt and turn on the engine. Turn off the AC and make sure the clutch on the compressor spins freely. Turn on the AC and see if the compressor clutch engages. Make sure all of the other driven pulleys spin freely. From your descriptions, it sounds like one of the pulleys is frozen, which is causing the belt to break.
What size belt do you have on now? And when its installed is it showing within the marked lines on the tensioner? I have a 2404 belt. I remember someone recently had something like a 2390 and it was giving him issues.
Also did you run the car with that 2330 belt on it?
What size belt do you have on now? And when its installed is it showing within the marked lines on the tensioner? I have a 2404 belt. I remember someone recently had something like a 2390 and it was giving him issues.
Also did you run the car with that 2330 belt on it?
What size belt do you have on now? And when its installed is it showing within the marked lines on the tensioner? I have a 2404 belt. I remember someone recently had something like a 2390 and it was giving him issues.
Also did you run the car with that 2330 belt on it?
so i have a master pro K060945 on i right now and it fits i also have a dayco belt i bought that also fits they both fit the same and the dayco is the OEM one. My issue im having is it’ll spin for 1-2 seconds then it gets stuck. I just found that out by recording it. Ill check my tensioner lines. Where are they at?
From what I gather reading today’s series of posts, even thought it’s a project car, you haven’t done anything to change the relationship of the pulleys on the engine.
But the compressor pulley will turn by hand until some force is put on it and then it seizes, breaking the drive belt.
That sounds like the compressor (or clutch) bushings are shot and when the belt tension is applied, something internal to the compressor (or clutch) gets out of line and jams. The usual repair is to just replace the compressor. If the problem can be isolated to the clutch, I believe that the clutch can be replaced by itself, since you DIY. That would be less expensive than replacing the compressor and would not require bleeding and recharging the AC system.
Your idea of bypassing the compressor with the short belt would be a quick fix to make the car drivable again.
From what I gather reading today’s series of posts, even thought it’s a project car, you haven’t done anything to change the relationship of the pulleys on the engine.
But the compressor pulley will turn by hand until some force is put on it and then it seizes, breaking the drive belt.
That sounds like the compressor (or clutch) bushings are shot and when the belt tension is applied, something internal to the compressor (or clutch) gets out of line and jams. The usual repair is to just replace the compressor. If the problem can be isolated to the clutch, I believe that the clutch can be replaced by itself, since you DIY. That would be less expensive than replacing the compressor and would not require bleeding and recharging the AC system.
Your idea of bypassing the compressor with the short belt would be a quick fix to make the car drivable again.
ill try to replace the bearings then. When i spin it i can feel resistance in one specific spot of the rotation. Downside is though my compressor doesn’t look like it has a clutch. There’s no difference its just a flat plate with a huge flat faced bolt. I havent found a A/C Compressor that looks like it. I’ll send a picture of it tomorrow.
Where is it lining up? Past the thicker line on the left = belt is short, towards thinner line on the right = belt is long/stretched.
I looked up 2008 Sport and came up with the same belt I got for mine. 2404mm. It is odd since the belt you say you have the master pro K060945 says it is 2401mm, which according to my operators manual is the size it recommends.
I looked up for the 4matic Sport, Sport gas and Sport Flex just to be sure.
Is there a printed label on your belt to make sure its what you ordered?
Its on the left belts too short. Both belts I’ve bought have been too short and i dont see any longer ones Anywhere.
even my dayco is too short and that ones longer than my master pro which is why im so confused
plus its not even past the thicker line its in the middle of the thicker line : | such a headache.
update i found one on mercedes website but if it doesn’t fit this is the 4th belt ive bought in like 3 days. I need this car running by tomorrow for a show so im fighting for my life rn lol
Just wondering is the belt installed the right way? Ignore the arrow.
Yes its on the right away if its on wrong it wont fit over the tension pulley or its too loose and goes way past the right line and still has slack. So its on properly its just the belts but ive bought every variant of the belt from the stores near me.
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