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Suggestions to block off coolant ports (s5 TII)? (turbo coolant feed/heater core)

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Suggestions to block off coolant ports (s5 TII)? (turbo coolant feed/heater core)

Old 03-23-08, 03:04 PM
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Suggestions to block off coolant ports (s5 TII)? (turbo coolant feed/heater core)

Hey guys,
My project is getting very close but this is one problem that has been plaguing me for a bit. Engine is a S5 block with S4 internals (for the lower compression rotors).

I need to find a way to blockoff the turbo oil feed (top of rear iron) and the one line for the heater core (under the oil filter pedistal). Heres the catch, I have spent considerable $$$ on this setup, and want something that I can rest assured will hold and not leak causing my engine to overheat.

I would like a solution that is better than "just throwing a hose on and a couple worm clamps sucked tight against a bolt". If anyone has any suggestions please let me know, for the turbo coolat feed I was thinking just using a tap to thread it and then put a bolt in with locktite. But unfortunately the heater core line is much larger and such a setup will not work.

Thanks for the suggestions.
Dan

Last edited by Dan_s_young; 03-23-08 at 03:14 PM.
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Old 03-23-08, 03:08 PM
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um... why not just use a wine cork?

the plastic ones.

what about the how on the radiator?
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Old 03-23-08, 03:12 PM
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To make sure you guys know the exact ports I am talking about I circled them in red on this picture.

Name:  reariron-1.jpg
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The rad does not have the line because I am using and aftermarket aluminum radiator.

Hmmm that plastic style wine cork is an interesting idea, I would just be concerned about the longevity. Will it be able to hand multiple heat cycles without failing over time. I would like to do this one time and never have to look back.
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Old 03-23-08, 03:13 PM
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The turbo oil feed line can be blocked off pretty easily, assuming you're speaking about the outlet on the top of the front iron. You can use a shortened M12x1.50mm bolt, with threads wrapped in teflon tape, with a copper crush warrrsher or o-ring at the base of the bolt head to help seal it up. Hope you already have an idea where you're going to borrow oil for the turbocharger assuming you're still using one.

The way I tackled the larger heater hose outlet on the rear iron was to pull the steel portion out, tap it for 3/4" NPT I think it was, then thread a brass plug in. I also filled in some of the area w/ JB Weld to ensure it wouldn't come out or leak somehow later on.

Hope this helps.

B
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Old 03-23-08, 03:17 PM
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Woops. You mean the turbo coolant feed that normally went to the throttle body's thermowax? You can remove that steel nipple, tap for 1/4"NPT if memory serves, then plug it up w/ a 1/4" NPT plug -- use a metal filler as well to help make sure it doesn't leak. The housing needs to be spotless prior to doing this.

B
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Old 03-23-08, 03:23 PM
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Excellent, so a 3/4" and 1/4" NPT tap, couple NPT plugs, and some JB weld/metal filler. Sounds like a solution I was looking for,just wish I would have done this with the engine still appart. I guess I will just have to run water through the engine to flush out any metal filings to prevent hot spots.

Thanks for the info!
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Old 03-24-08, 12:13 AM
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Yep! Give it a try. Double-check on those tap sizes, however. That's just working from memory.

B
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Old 04-03-16, 08:12 PM
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do you really need jb weld if using a 1/4 not? its fairly low pressure
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Old 04-04-16, 09:48 AM
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Originally Posted by rollcoal View Post
do you really need jb weld if using a 1/4 not? its fairly low pressure
Consider it a permanent version of thread tape.
Also, consider using straight threads for these jobs. NPT's are easier to seal, but they can cause cracking.
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Old 04-04-16, 10:06 AM
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Originally Posted by RXSpeed16 View Post
Consider it a permanent version of thread tape.
Also, consider using straight threads for these jobs. NPT's are easier to seal, but they can cause cracking.
I was considering this aswell, straight threads with jb weld or something
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