Ken, A few of my customers have had similar experiences because they didn't remove the original wasserboxer coolant manifold from the system. If the donor engine has been sitting for a while there is a good chance that the T stat is seized. So, assuming that you don't have the coolant manifold in there. The main water pipe from the head goes to the passenger side pipe and the pump goes to the driver side pipe, I would remove the thermostat completely and see if there is still a problem. On later motors from the Jetta IV series of vehicle the sender for the water temp gauge is calibrated differently. A 100 to 150ohm resistor is needed to make it read more correctly. Perhaps there is a new style sender in this engine? I have never seen pumps fail to push water unless they were wobbling and making horrible grinding noises. Failing all that... I would start to suspect the head gasket, especially if they have previously overheated the motor. Good luck with solving the problem. David Marshall Fast Forward Automotive Inc. 4356 Quesnel-Hixon Road Quesnel BC Canada V2J 6Z3 http://www.fastforward.ca mailto:sales@fastforward.ca Phone: (250) 992 7775 FAX: (250) 992 1160 - Vanagon Accessories and Engine Conversions - Vanagon, Transporter and Iltis Sales and Importation - European Lighting for most Volkswagen models
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-----Original Message----- From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com]On Behalf Of Kenneth Wilford Sent: February 9, 2005 2:34 PM To: vanagon@GERRY.VANAGON.COM Subject: Problem with Overheating with ABA conversion
OK, I have my customer's ABA 2.0l 97 Jetta engine conversion almost finished. We finished the exhaust system and wiring harness and it is running very well. However after running for a while we have an overheating problem. The temp just goes up and up. If you feel the two hoses by the engine both of them get hot (the one that comes from the head gets hot faster than the one on the water pump but they both get hot). But when you go to the center of the van the two plastic pipes aren't more than slightly warm and the radiator is stone cold. I can also get no heat out of either heaters (rear or front). It seems like I am having a flow or circulation problem. I think that the thermostat is opening since the hose that is hooked to it does get hot after a while. I bled the coolant system repeatedly to try to get all of the air out of the system. Didn't seem to make a difference to the flow problem. I don't know the history of the Vanagon that this conversion was put into. I am thinking that I either have: 1. A clogged radiator 2. A bad water pump 3. A bad thermostat Any insights that you folks who have done this conversion before might have would be appreciated. It is going into a 91 GL Vanagon with Automatic transmission. Thanks, Ken Wilford John 3:16 http://www.vanagain.com http://www.strictlyvwauctions.com http://www.eurovan.org http://www.vwcabrio.org Phone: (856)-327-4936 Fax: (856)-327-2242 |
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