TheSamba.com :: View topic - Engine won't turn when it's really cold out

Thu Nov 19, 2009 7:11 am

morymob wrote: My '70 bay did that, after checking starter i replaced all cables with 6V size as they have a lot larger copper core to handle the hi current a starter needs. Most 12v cables are mostly insulation and barely do the job in warm weather.

I have done this on many vehicles I have owned over the years and it usually makes a noticeable difference in the cranking speed. Cables need replacing occasionally any way due to corrosion and insulation failure. It probably won't cost him an extra ten spot to go to a size larger cable if and when replacement is warranted.

Thu Nov 19, 2009 8:19 am

Great, those sound like some good places to start searching. I am going to pick up a new battery ground and would like to also replace the tranny ground so i know for sure that is not the issue, but is that something that i can find at my local auto shop? or a bit more specific to the VW? Can i make one out of something they might have? or is it better to order the om part?

Im glad you guys are here to help break my dependence on my local mechanic!

Thu Nov 19, 2009 10:38 am

While you are getting a new battery and grounds, also get a new POSITIVE cable. Getting the juice moving out of the battery to start with can be as important as bringing it back.

Sounds like you are on the right track.

Thu Nov 19, 2009 10:54 am

Most flaps have cables in diff lengths-take yours out and take with u then u won't go wrong.

Thu Nov 19, 2009 7:46 pm

sensimilla wrote: would like to also replace the tranny ground so i know for sure that is not the issue, Nothing special that it was a braided flat strap. Get a regular battery cable with the eyelets on each end. The other main concern is getting all the connections in wonderful clean shape. Coat the clean connections with dialectric grease or the battery terminal goop. It will keep them in good shape preventing corrosion.

Thu Nov 19, 2009 8:18 pm

SGKent wrote: been there done that on mine and other VW's from that era. The grease in the starter solenoid gets sticky. Tap (not whack) it with a hammer while someone else turns the key. See if that helps and report back.

I agree. I would do as many have suggested and check all of your cables and connections, which may help. But it sounds like there is trouble in the starter/solenoid to me.

Why?

Because electrical resistance Isn't significantly higher at the temps that are a problem. In some metals it is slightly lower. Batteries tend to put out less current when cold. But since you've got a new 800cca battery, I doubt that's the culprit.

Mechanical resistance on the other hand tends to be greater at low temps. Viscosity of lubricants increases, tolerances decrease and any moisure in the works becomes solid below 32*F.

I would try what SGKent suggests and if it doesn't work consider rebuilding or replacing the started.

For the record. I am in the camp that likes to run a starter relay. I won't go into that now. You can do a search and find more info and lots of opinions.

Fri Nov 20, 2009 12:08 am

I had a hot start problem with my solenoid about 16-17 years ago. Removed the solenoid and lubed it with something, I don't remember what, but it worked fine after that.

Fri Nov 20, 2009 12:18 am

josh wrote:

Because electrical resistance Isn't significantly higher at the temps that are a problem. In some metals it is slightly lower. Batteries tend to put out less current when cold. But since you've got a new 800cca battery, I doubt that's the culprit.

I don't think it was mentioned if the battery is new but yea..

sensimilla said the starter "clicks" and he has lights just no turning over.
Frozen starter or current problems I would assume. Good replys from everyone
Relay would be good just to have either way so current doesn't have to go all the way to the front of the bus then back to the starter

Fri Nov 20, 2009 5:02 am

Like has been discussed 100 times before, short between the starter terminals. Real quick you can find out which direction to head to get the problem resolved.