Stupid radiator question (Page 1/1)
jaydaug2008 JAN 15, 05:28 PM
My car is a 85 gt 2.8 with a 4 speed.......The radiator that came out of it didnt have transmission lines which is probably normal because its a manual but the radiator I bought has the holes for them....Do I have to plug them? If so how?

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James Silver 1986 Fiero SE V6 Auto...Red 1985 GT 4 speed
Central Florida

theogre JAN 15, 05:42 PM
Nearly All Replacement Rads only come as auto trans "coolers" builtin.

For stick cars, Can run w/o the ports plugged but can cause problems getting polluted water etc in there.
As to type of hole... many are standard US NPT means tapper thread but have to watch the threads don't bind & related problems.

Don't need to tighten very much.

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Dr. Ian Malcolm: Yeah, but your scientists were so preoccupied with whether or not they could, they didn't stop to think if they should.
(Jurassic Park)


The Ogre's Fiero Cave

jaydaug2008 JAN 15, 05:47 PM
Thank you Ogre for your speedy responses always!! That is great news I will probably just keep the plastic threaded protective plugs it came with! You Da Man Ogre Thank You!!!

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James Silver 1986 Fiero SE V6 Auto...Red 1985 GT 4 speed
Central Florida

82-T/A [At Work] JAN 15, 07:37 PM

quote
Originally posted by jaydaug2008:

My car is a 85 gt 2.8 with a 4 speed.......The radiator that came out of it didnt have transmission lines which is probably normal because its a manual but the radiator I bought has the holes for them....Do I have to plug them? If so how?





I've seen people use them as oil coolers for the engine when installed in a manual transmission car... but of course that's in a front-engined car... not worth the hassle and risk of leaks to do it in a Fiero.

When I installed a new radiator in my Fiero which I was converting to manual transmission... I bought the correct sized brass plugs for the hole. I put it on it's end though and sprayed a ton of WD-40 into the hole until I saw a little bit come out the other end. I didn't feel comfortable sealing it off without knowing there was at least some kind of lubricant in there to help prevent oxidization (to a degree). I then just plugged them and went on with my life.
jaydaug2008 JAN 15, 07:55 PM
Thank you all for the answers got it all buttoned up ready to add some coolant....It's gotten a new water pump 5 new hoses and a radiator...I think were in business. gonna run it straight water for a few days till I know we are not going to have any blowouts..Im in florida so no freezing.....besides Im still trying to get the rust color out of the pipes.. flushed it 10 times already and still brown but its getting better..
theogre JAN 15, 09:47 PM
Plastic plugs may work out over time.

Some spray oil of any type maybe good in the "cooler" but many don't play well w/ plastic including plastic rad tank & seal where crimped to the body..


quote
Originally posted by 82-T/A [At Work]:
I've seen people use them as oil coolers for the engine when installed in a manual transmission car... but of course that's in a front-engined car... not worth the hassle and risk of leaks to do it in a Fiero.

Very bad on so many levels...
Example: line to the rad "cooler" is too small to flow enough oil + cooler is not made to have much oil pressure in it. AT oil is "waste" oil from pump regulator then dumps "cool" oil in the tran's pan.

AT "cooler" is not just for cooling & big reason is on Hot Side of the Rad. Is Often to Heat the oil when cold weather driving on Highway that keeps TC Locked or worse Both @ same time. Because AT Oil needs 150-250°F to run right & drive off moisture from air getting in thru the vent.
Vintage-Nut JAN 16, 10:57 AM

quote
jaydaug2008:
gonna run it straight water for a few days / Im still trying to get the rust color out of the pipes.. flushed it 10 times already and still brown..



BTW - 'Straight Water' will start to rust the metal fast; don't wait too long to add antifreeze....

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The cooling system fluid capacity of the 2.8L engine is 13.8 quarts and when draining it, 50% of liquid is ‘trapped’ in the engine block and other 'pockets'.

To me, don't flush the system with 'tap' water that might have mineral content, which can form scale in the engine cooling system if left in the system.

I always use distilled water to flush my vehicles until the drained liquid is nearly colorless.

In my Fiero, the fully flushed 2.8L coolant system has ~7 quarts of distilled water in the system. My next step is to pour ~2 gallons of straight full strength concentrate antifreeze, not a premixed 50/50.

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Original Owner of a Silver '88 GT
Under 'Production Refurbishment' @ 136k Miles