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Old 06-18-2018, 07:45 AM   #1
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engine harness: tip vs manual

I have a 2002 manual transmission with a bad engine. I sourced a 2000 tip engine. Question: will the engine harness for the tip engine work (leaving maybe some leftover and unused plugs for the tip ecu) or do I need to pull off my old harness and put it on the new engine?

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Old 06-18-2018, 03:06 PM   #2
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The manual and tip engine harnesses are different.

You will need to swap the engine harness from bad engine (which is wired for a manual transmission) onto the replacement tip engine.

There are also cooling line and vacuum line mod's that need to be made (which are easy to do).

There should be a 4 way "T" and a 3 way "T" cooling hose on the Tip motor. Use the 3 way hose and the "L" shaped hose from the Manual motor.
The vacuum line on the tip at the intake has a 4 way tee. Use the 3 way "T" from the manual motor.

I apologize to who ever originally posted those instructions! I lost the link and so I can't give proper credit.
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Last edited by thstone; 06-18-2018 at 03:24 PM.
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Old 06-18-2018, 08:37 PM   #3
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While you're switching the wire harness over, I highly recommend replacing all the vacuum hoses and O-rings while you're there. Mostly the hoses
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Old 06-19-2018, 03:57 AM   #4
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Thanks Woody and Thstone.
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Old 06-19-2018, 05:29 AM   #5
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One last thing... The vacuum hose for the brake booster is connected on the right rear of the engine for Tiptronic and to the left front with the manual transmission. You should be able to move a cap (sealing the fitting) from one end to the other and connect up your existing vacuum hose.

Copy/paste from an old post:
On a manual transmission there is only an elbow fitting at the left front of the intake manifold (no. 23):

On the Tiptronic there is only a blank cover in that position. The Venturi tube connects to the right rear intake manifold and additionally to the pre-throttle intake, then terminates at the front left to connect to the booster line. The effect is greater vacuum.
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.

Last edited by 78F350; 06-19-2018 at 05:43 AM.
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Old 06-19-2018, 05:54 AM   #6
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Excellent. Thanks!

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