CBEA to CJAA Engine Swap Problem - Thermostat

Hey guys.

so i have a 2009 CBEA jetta wagon. Had a blown engine so i picked up a low km CJAA engine from a 2013 jetta.

had to use the wiring harness from my blown CBEA since the harness on the new CJAA was all cut up.

Looks like the man problem i have is that the old CBEA engine used a thermostat housing with a sensor in there...which means it had a connector going to it.

Now that i put the new CJAA engine in the thermostat housing on that engine is different. Its a bigger housing and it doesnt use any connectors/coolant sensors in there. WHICH leaves me with a plug on the harness NOT PLUGGED into anything.

BTW. The driver side coolant flange DOES still have a CTS there on the CJAA engine and that plugged right in using the old CBEA engine harness.


what are my options here?

will it throw a CEL if i leave the thermostat housing plug unplugged?

Do i have to get a whole new CBEA thermostat housing/piping (old was damaged)

Is there a way to bypass that plug and plug it into something else?

thank you

just to clarify that post.

im suppose to grab the temp sensor from the CBEA thermostat housing.

also grab some extra coolant hose. shove the temp sensor into the coolant hose, put a clamp on it and intergrate the hose w/temp sensor around the CJAA thermostat housing - connecting it to current coolant hoses?

also. what is a "tee"

2009 TDI Engine Swap/Alternatives - Worth It?

We'll try to help you out, but just use one thread please/////////

Combine17 said:

just to clarify that post.

im suppose to g. b the temp sensor from the CBEA thermostat housing.

also grab some extra coolant hose. shove the temp sensor into the coolant hose, put a clamp on it and intergrate the hose w/temp sensor around the CJAA thermostat housing - connecting it to current coolant hoses?

also. what is a "tee"

Click to expand...

A tee is a T shaped fitting that gets clamped into the coolant hose. The coolant temp sensor gets plugged into the perpendicular portion of the fitting.

Andy just posted this. Pretty much perfectly illustrates the general idea of what you need to do except using factory parts in stead of relying on your stash pile

http://forums.tdiclub.com/showpost.php?p=5154385&postcount=15

trick to change the terrible plastic thermostat on CJAA