1979 Grinds at idle

[JerrietheBus]

Hey all, I've been having an issue with my 1979 bay for the last few days.

It starts up fine, but idles louder than normal with occasional grinding noises. After about 5-10 minutes it quiets down and the grinding stops. I haven't looked too closely yet, but I thought I'd get an idea of what to look at here. It seems to drive fine once it's going. I also recently had to replace my rear wheel bearings, is it possible something got messed up when I did that? Or is this just a seasonal thing and that's all a normal reaction to the cold until it warms up?

Thanks in advance, y'all are always super helpful and I learn a lot every time I make a post here.

[timvw7476]

if the rear wheel bearings were changed, the rear brake shoes do get adjusted as far as their distance to the drums. Tighter is better, looser can lead to ..... grinding / scraping sounds.
Next on the list would be a throw out bearing in the trans announcing it's time is at an end.

[Wildthings]

Saying it happens at idle implies it happens when the van is not moving, yet other things in your post implies it happens while the van is moving. Which is it?

If it happens when you first start moving on a cold day it could be the speedo cable or some other cold noise.

[jtauxe]

If it grinds or whines when the bus is not moving and with the clutch disengaged (foot on the clutch pedal), and the pitch is correlated to RPM, it could be the throwout bearing.
_________________
John
"Travelling in a fried-out Kombi, on a hippie trail, head full of zombie..." - Colin Hay and Ron Strykert
http://vw.tauxe.net
1969 Transporter, 1971 Westfalia, 1976, 1977, 1976, 1977, 1971, 1973, 1977 Westfalias,
1979 Champagne Sunroof, 1974 Westfalia Automatic, 1979 Transporter, 1972 Sportsmobile, 1973 Transporter Wild Westerner, 1974 Westfalia parts bus, 1975 Mexican single cab *FOR SALE*, 1978 Irish 4-door double cab RHD

[JerrietheBus]

[JerrietheBus]

[SGKent]

maybe the starter is hanging
_________________
“Most people don’t know what they’re doing, and a lot of them are really good at it.” - George Carlin