

| Subject: | pressure bleeding the coolant system |
| From: | Stephen Davis |
| Date: | Tue, 14 Apr 1998 21:43:47 -0400 |
> Darrell wrote:
>
> >> The following setup using a bike tire pump seems to over come some of
> the problems that can develop when flushing, or replacing coolant in the
> cooling system on our water cooled vans. <<
Hey Volks
Thanks to Darrell I tried this system on my van this weekend after I messed up a Bentley procedure
with a air locked waterpump. I had to pump up the system and refill the tank a number of times but coolant
did come out the radiator. Then I started up the van, put it up on ramps and checked the system ala Bentley.
Only a little air in the system and that came right out after the van had warmed up enough to open the
thermostat. There is a little air in the left hand tank in the back which I can't get out because of the
internal reinforcements in the plastic molding, I hope that is alright. I found that a zefal
press-and-twist-the-lever mt. bike pump fit right on the cap nipple. I also used a high quality Silica track
pump with built in gauge to monitor the pressure I was adding to the system. I never approached the 1 bar
level that the system is designed to run at. I drove the van to work today (22 mi at 65 mph) and the temp
looked fine and I had heat. Are there any other symptoms that I should be aware of for air in the system?
Lets hope I haven't offended the vw gods by sharing my good news.
Later,
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