DIY Turbo Discussion greddy on a 1.8? homebrew kit?

coolant reroute sensor/begi kit

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Old 08-09-2008, 09:01 AM
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Originally Posted by mcsinc
Hustler: did you figure out your main routing out the back of the head? The 1.6 cap fits perfectly and points to the i/t manifold side, horizontally (3:00 position, direction). Not sure why more people aren't just using one of these instead of chopping and welding the 1.8 cap ??
I bought the JR spacer and need to get it tapped. I'm going to run the 1.8l flange so it clears the clt sensor in the back of the head. All I have to get now are the hoses and machine work done.
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Old 08-09-2008, 11:10 AM
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Originally Posted by mcsinc
What is the thread on your sending unit? If it's not metric, there's not much point worrying about the plug.

Isn't the problem with putting a temp sensor in the 99503 location is that it will only sense the temp after the thermostat (ie: when the thermostat is open? Hard to tell from that diagram, and it's been awhile since I looked at the back of the head.
I would get/make an adapter plug. I can tell by looking that the plug thread is much larger than the sending unit, metric or not, so it will take an adapter regardless. Easy.

It should be very close to the temperature of the stock sensor which is what I am looking for.
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Old 08-15-2008, 06:54 PM
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$50 to cut the groove and tap it.
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Old 08-15-2008, 07:43 PM
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Originally Posted by ZX-Tex
I would get/make an adapter plug. I can tell by looking that the plug thread is much larger than the sending unit, metric or not, so it will take an adapter regardless. Easy.

It should be very close to the temperature of the stock sensor which is what I am looking for.
are you talking about the sending unit for the 1.6 gauge in the 99 head, or something else?
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Old 08-15-2008, 07:45 PM
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Originally Posted by hustler
$50 to cut the groove and tap it.
That's a lot of money you payed
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Old 08-15-2008, 08:08 PM
  #66  
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I'd still like to know the routing of the begi reroute, since I'm going to use the rest of the pipes and hoses to build it off the car with an intercooler pipe right in front of the rad flange.
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Old 08-15-2008, 09:59 PM
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Originally Posted by hustler
are you talking about the sending unit for the 1.6 gauge in the 99 head, or something else?
When I look at the coolant fitting on the back of the head (stock 99 stuff) I can see the plug shown in the above diagram. I want to remove that plug and use the hole (with an adapter plug) to screw in an aftermarket sending unit.

I could take the car offline, pull the plug, figure out the threads, go find one, etc. But I want to know what the plug is so I do not have the car down while I am looking for one I can drill and tap.
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Old 08-15-2008, 10:03 PM
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Originally Posted by hustler
I'd still like to know the routing of the begi reroute, since I'm going to use the rest of the pipes and hoses to build it off the car with an intercooler pipe right in front of the rad flange.
If you are talking about the normal non-race one, it is easy. The heater core hose (the outlet hose) is disconnected from the pipe that runs under the exhaust manifold. It is rerouted to a tee (BEGI supplied) that is placed inline with the inlet hose to the radiator.

So the coolant leaves the back of the head, goes through the firewall into the heater core, through the core, comes back out of the firewall, runs into a bypass hose that runs around the back of the motor to the cold side, under the intake manifold, and up to the aforementioned tee in the upper radiator hose. Easy.
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Old 08-15-2008, 10:59 PM
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i just want to know about the pipe on the side of the head, the front is plugged. I can't remember what all the **** looks like because I haven't seen it in 3 months.
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