| The Young Dude |
Sun Oct 25, 2009 2:52 pm |
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The story starts with a dead battery so i jumped it. When i started it i knew instantly i had problems. The noise my motor makes is like a machine gun and i know that aircooled motors are loud beasts. But this was something really bad. My dad says it might be the lifters ??
Do you have any tips sugesstions ? |
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| VDubTech |
Sun Oct 25, 2009 2:55 pm |
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| If it hasn't been started in a while the lifters can bleed down. '79 Buses all came with hydraulic lifters, meaning they are filled with oil constantly. If the oil bleeds off, it'll sound like it's gonna come apart for about 20 minutes or so until they pump back up again. Verify you have the correct level of oil in it and that the oil pressure light goes off when starting it, and let it run. It will take a little longer to pump them up just idling it, but a good healthy 20 minute drive will pump them all up as well. |
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| 73kombi |
Sun Oct 25, 2009 3:05 pm |
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The Young Dude wrote: My dad says it might be the lifters ??
Do you have any tips sugesstions ?
Listen to your Dad? |
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| The Young Dude |
Sun Oct 25, 2009 3:06 pm |
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| its been like three or four days since ive started it. I checked the oil and its fine. The oil light goes off when its started. My dad said go drive around the block a few times and see if it goes away. Well it dident. But i will try and go for a good 20min drive. If that doesn't fix it i will post again reporting new problems or if its fixed. |
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| 73kombi |
Sun Oct 25, 2009 3:10 pm |
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| Does it run good? Besides the noise? Do you still have the FI or is it carbed? |
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| tolkien |
Sun Oct 25, 2009 3:54 pm |
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my 79 does not always get driven as much as i'd like.
if it sits for a few days, the lifters will bleed down a little.
if it sits for 2 weeks :cry: it will take a 15-20 min drive to get the "noise to stop" kinda scary to drive like that (a bit embarassing too) but after the first time , you will know for sure thats all it is..
remedy..for me is to drive it more often,,,but i gotta fix a leak first..aghhh |
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| Wildthings |
Sun Oct 25, 2009 7:07 pm |
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| One thing that sometimes helps is to run the engine for 5 minutes or so and then shut it off for a like amount of time. Repeat several times. Thin oil like a 5W-30 seems to work better than thick oil. Some people also report success by adding Marvel Mystery Oil to their crankcase. |
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| The Young Dude |
Sun Oct 25, 2009 8:09 pm |
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73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The bus runs great after i drove the noise out. I was very impressed after such a teribble noise.
but there seems to be a problem with the left rear tire it sounds like a little rock is in the hub cap every time the wheel makes a full rotation but i took the hub cap off and nothing was there :oops: i dont know what that could be |
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| Wildthings |
Mon Oct 26, 2009 4:16 am |
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The Young Dude wrote: 73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The bus runs great after i drove the noise out. I was very impressed after such a teribble noise.
but there seems to be a problem with the left rear tire it sounds like a little rock is in the hub cap every time the wheel makes a full rotation but i took the hub cap off and nothing was there :oops: i dont know what that could be
Park the bus on level ground with the parking brake on, but the engine off and in neutral. Crawl under and grab the drive shaft coming out of the transmission. Twist the hub on the transmission end back and forth. How much does it move? While you are doing this grab the center of the shaft and slide it in and out. Does it move in and out smoothly, or is it rough?
If every thing is good here you may have something falling apart inside your brake drum and will need to take that apart to check it. |
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| The Young Dude |
Mon Oct 26, 2009 7:17 am |
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| I took it to my local vw man. He took both the rear tires off and inspected the brakes for free. He said nothing was scraping the brakes were fine... So after school ill do ( Wildthings ) procedure. |
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| Randy in Maine |
Mon Oct 26, 2009 7:42 am |
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What kind of shape are the CV joints in?
You may have one or more that have dead dry grease in there.
You can re-pack them yourself for about $50. A great excuse to buy a bench vise also. |
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| The Young Dude |
Mon Oct 26, 2009 6:19 pm |
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Wildthings wrote: The Young Dude wrote: 73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The bus runs great after i drove the noise out. I was very impressed after such a teribble noise.
but there seems to be a problem with the left rear tire it sounds like a little rock is in the hub cap every time the wheel makes a full rotation but i took the hub cap off and nothing was there :oops: i dont know what that could be
Park the bus on level ground with the parking brake on, but the engine off and in neutral. Crawl under and grab the drive shaft coming out of the transmission. Twist the hub on the transmission end back and forth. How much does it move? While you are doing this grab the center of the shaft and slide it in and out. Does it move in and out smoothly, or is it rough?
If every thing is good here you may have something falling apart inside your brake drum and will need to take that apart to check it.
it moves about and inch and stops. the action is smooth not rough i drove it about an hour ago and it got worse a loud rattle/rock in the hub cap |
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| Randy in Maine |
Mon Oct 26, 2009 7:02 pm |
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| Remove hubcap and try it again. |
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| Wildthings |
Mon Oct 26, 2009 7:32 pm |
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The Young Dude wrote: Wildthings wrote: The Young Dude wrote: 73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The bus runs great after i drove the noise out. I was very impressed after such a teribble noise.
but there seems to be a problem with the left rear tire it sounds like a little rock is in the hub cap every time the wheel makes a full rotation but i took the hub cap off and nothing was there :oops: i dont know what that could be
Park the bus on level ground with the parking brake on, with the engine off and the tranny in neutral. Crawl under and grab the drive shaft coming out of the transmission. Twist the hub on the transmission end back and forth. How much does it move? While you are doing this grab the center of the shaft and slide it in and out. Does it move in and out smoothly, or is it rough?
If every thing is good here you may have something falling apart inside your brake drum and will need to take that apart to check it.
it moves about and inch and stops. the action is smooth not rough i drove it about an hour ago and it got worse a loud rattle/rock in the hub cap
How much can you rotate the inner CV joint/hub on the transmission? You should have very little movement, like 1/32 - 1/16 of an inch. The in and out sliding of the axle of about 1 inch is normal, but you want to check that it slides smoothly while applying torque to the inner joint/hub in both directions. |
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| The Young Dude |
Tue Oct 27, 2009 7:34 am |
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Wildthings wrote: The Young Dude wrote: Wildthings wrote: The Young Dude wrote: 73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The bus runs great after i drove the noise out. I was very impressed after such a teribble noise.
but there seems to be a problem with the left rear tire it sounds like a little rock is in the hub cap every time the wheel makes a full rotation but i took the hub cap off and nothing was there :oops: i dont know what that could be
Park the bus on level ground with the parking brake on, with the engine off and the tranny in neutral. Crawl under and grab the drive shaft coming out of the transmission. Twist the hub on the transmission end back and forth. How much does it move? While you are doing this grab the center of the shaft and slide it in and out. Does it move in and out smoothly, or is it rough?
If every thing is good here you may have something falling apart inside your brake drum and will need to take that apart to check it.
it moves about and inch and stops. the action is smooth not rough i drove it about an hour ago and it got worse a loud rattle/rock in the hub cap
How much can you rotate the inner CV joint/hub on the transmission? You should have very little movement, like 1/32 - 1/16 of an inch. The in and out sliding of the axle of about 1 inch is normal, but you want to check that it slides smoothly while applying torque to the inner joint/hub in both directions.
Ok i did that yes it moves smoothly. I took it to my vw man jim. He took the wheel off and said the brakes were great. Im going to take it back to him and have him do a front to back check its never had that since i got it. Last time he said i was missing the heater tubes so im getting those
installed. I will keep you guys posted if he diagnosis the problem. |
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| The Young Dude |
Tue Oct 27, 2009 7:36 am |
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73kombi wrote: Does it run good? Besides the noise? Do you still have the FI or is it carbed?
The engine itself runs good. Its FI |
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