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TDI Conversions Discussions on converting non TDIs into TDIS. More general items can be answered better in other sections. This is ideal for issues that don't have an overlap and are very special to swaping engines.

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Old March 8th, 2017, 12:17   #31
smelly621
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Sorry for my question on the hose routing - it was an effect of the engine cover and the angle that made it look like it may be switched.

Hottest point is coming out of the back of the head - so may as well measure close to there.
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Old March 8th, 2017, 12:41   #32
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Just to make sure we are on the same page ... The TDI engine is not "reverse flow", the coolant comes out the top/rear (top/right, in this case) of the head as described. The thing that could seem odd to someone used to how traditional cooling systems are arranged is that the thermostat is at the water pump housing (bottom/front/left in this case) and it regulates the inlet temperature of the water pump.

You need to have the bypass loop connected - the flow through the heater core, which also goes out the top of the engine and returns back in at the smaller connection at the thermostat/water pump housing.

The spherical bottle is part of the pressurized part of the system.

If you hook it all up the way it was in the original VW installation and use as many of the original bits and pieces as possible (including the coolant bottle but obviously the radiator will be different), it will be fine.

Best spot for a coolant temperature gauge sender is the outlet from the cylinder head (top/rear/right). Best spot for a cooling fan thermoswitch is in the return flow from the bottom of the radiator to the water pump and have it set a little below the thermostat opening temperature. That way the cooling fan will only come on when it really has to, i.e. when you are actually stopped with no air flow. When you are normally driving, the return from the radiator will be well below the engine temperature.
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Old March 9th, 2017, 13:55   #33
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Constant flow through the heater core is not needed, there is continual flow through the oil/coolant heat exchanger.

Same goes for the coolant bottle - it can be deleted and a normal pressurized radiator cap and overflow bottle can be used. Working just fine this way for a number of conversions on here.
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Old March 16th, 2017, 13:08   #34
CF-FZD
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Up and running,
https://youtu.be/IBdEy_fgeZ8
https://youtu.be/cXZjm9RjTew
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Old March 16th, 2017, 15:16   #35
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Awesome! Looks great, sounds great- really like what you did with the instrument panel. Nice job!
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Old March 16th, 2017, 17:20   #36
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Nice. Are you using a lift pump? I would put some clear fuel line on the inlet and outlet lines to make sure your hickup is not air in the fuel related.
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Old March 22nd, 2017, 13:42   #37
CF-FZD
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First drive around the block
https://youtu.be/ZEpBGwm-gnk
It still needs some adjustments to the tune to reduce smoke.
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Old March 22nd, 2017, 17:22   #38
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Nice!!! Where's your IQ set? That's some pretty heavy smoke. Fire some logs my way when you get a chance, keen to see this thing running right.
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Old March 22nd, 2017, 17:44   #39
CF-FZD
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Quote:
Originally Posted by Owain@malonetuning View Post
Nice!!! Where's your IQ set? That's some pretty heavy smoke. Fire some logs my way when you get a chance, keen to see this thing running right.
I have absolutely no idea where the IQ is set. Justin said he was going to plug it in and adjust it. It idles a bit rough and has a misfire now and then when it's cold. We will be in touch.
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Old March 22nd, 2017, 19:06   #40
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Man looks like a fun ride for sure.
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Old March 31st, 2017, 04:37   #41
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sounds like your clutch is slipping or is that tire slip ?
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Old March 31st, 2017, 04:38   #42
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First time at the diesel pump.


I look forward to driving it more and finding out what kind of mileage it gets.
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Old March 31st, 2017, 04:39   #43
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Quote:
Originally Posted by smelly621 View Post
Constant flow through the heater core is not needed, there is continual flow through the oil/coolant heat exchanger.
Same goes for the coolant bottle - it can be deleted and a normal pressurized radiator cap and overflow bottle can be used. Working just fine this way for a number of conversions on here.
this^^ no bypass required
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Old March 31st, 2017, 04:40   #44
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looks awesome
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Old March 31st, 2017, 05:30   #45
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Quote:
Originally Posted by jimbote View Post
looks awesome
You like it..?

Please tell me you know of a super strong clutch that will help put the power to the ground. Toyota r150 trans.
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