Cooling Port for 1990 Lt5 - Page 2 - ZR-1 Net Registry Forums

Ccmano · 08-04-2019

As stated it was a press fit to begin with. I would use a sealant like clear RTV and put it back on.
H

ZuggZR1 · 08-04-2019

excuse my newbieism i can get the rtv at autoparts store?

ZuggZR1 · 08-04-2019

Which one is better:

1: https://shop.advanceautoparts.com/p/...hTerm=Permatex

2: https://shop.advanceautoparts.com/p/...hTerm=Permatex

I wann aget this fixed today if possible.

thanks again for all your help guys

Ccmano · 08-04-2019

Either will work, I would use the RTV.
H

Paul Workman · 08-05-2019

Quote:

Originally Posted by TX '90 ZR1

I don't think Paul is recommending you JB Weld the fitting and use it. Think he is referring to blocking the coolant flow from the plenum with the plug (there are posts here on the forum detailing the procedure) and using the JB Weld to hold the fitting in place to give it a stock look.

Yes. You understood what I was trying to say.

Z51JEFF · 08-05-2019

You won’t have to worry about any wise a$$ comments from this group,everybody gets along here and is more than glad to assist. As stated I’d bypass the TB and just plug the elbow back in and run some dummy hoses to the elbow to make it look like it’s stock,more or less. As far as trying to get it to stay in and use it for the intended purpose I’d think once it comes out there’s nothing that can be done to keep it in place,once it’s compromised,pulled out it’s done. If the plenum is powder coated maybe it was removed during the process.

ZuggZR1 · 08-08-2019

Ended up using JB weld and placed back in after sanding the connector and cleaning up. let it cure 24 hours. Will test tonite when I jack up right side of car and add remaining coolant

ram_g · 08-08-2020

Zugg, did this fix hold? Or did you need to do something else to permanently solve the problem?

Also, when the fitting came out, were you driving and was there an immediate sign of a problem such that you pulled over and stopped?

I will shortly start a new thread but I have a similar (not identical) issue.

Corvette95 · 08-08-2020

Holley make a direct replacement, I have it on mine. You tap the port and screw in the exact press in fitting with the same upward twist...direct fit. It is one of these...sorry can't remember which. 782205ERL Earl's Vapor Guard? Hose End
782252ERL Earl's Vapor Guard? Hose End
782256ERL Earl's Vapor Guard? Hose End

ZuggZR1 · 08-08-2020

JB weld held and yes it happened while driving the Engine started to over heat

08-04-2019	#11
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Cooling Port for 1990 Lt5 As stated it was a press fit to begin with. I would use a sealant like clear RTV and put it back on. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

08-04-2019	#12
ZuggZR1 Join Date: Jul 2019 Location: Holly Springs, NC Posts: 91	Re: Cooling Port for 1990 Lt5 excuse my newbieism i can get the rtv at autoparts store? Last edited by ZuggZR1; 08-04-2019 at 01:13 PM.

08-04-2019	#13
ZuggZR1 Join Date: Jul 2019 Location: Holly Springs, NC Posts: 91	Re: Cooling Port for 1990 Lt5 Which one is better: 1: https://shop.advanceautoparts.com/p/...hTerm=Permatex 2: https://shop.advanceautoparts.com/p/...hTerm=Permatex I wann aget this fixed today if possible. thanks again for all your help guys Last edited by ZuggZR1; 08-04-2019 at 01:35 PM.

08-04-2019	#14
Ccmano Join Date: Jun 2006 Location: Sparks, NV Posts: 2,852	Re: Cooling Port for 1990 Lt5 Either will work, I would use the RTV. H __________________ 90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold.

08-05-2019	#16
Z51JEFF Join Date: Dec 2007 Location: Fremont,Ca Posts: 3,078	Re: Cooling Port for 1990 Lt5 You won’t have to worry about any wise a$$ comments from this group,everybody gets along here and is more than glad to assist. As stated I’d bypass the TB and just plug the elbow back in and run some dummy hoses to the elbow to make it look like it’s stock,more or less. As far as trying to get it to stay in and use it for the intended purpose I’d think once it comes out there’s nothing that can be done to keep it in place,once it’s compromised,pulled out it’s done. If the plenum is powder coated maybe it was removed during the process. Last edited by Z51JEFF; 08-05-2019 at 11:04 AM.

08-08-2020	#18
ram_g Join Date: Jun 2020 Location: Houston, TX Posts: 183	Re: Cooling Port for 1990 Lt5 Zugg, did this fix hold? Or did you need to do something else to permanently solve the problem? Also, when the fitting came out, were you driving and was there an immediate sign of a problem such that you pulled over and stopped? I will shortly start a new thread but I have a similar (not identical) issue.

08-08-2020	#19
Corvette95 Join Date: Jan 2006 Location: Decatur, AL Posts: 1,119	Re: Cooling Port for 1990 Lt5 Holley make a direct replacement, I have it on mine. You tap the port and screw in the exact press in fitting with the same upward twist...direct fit. It is one of these...sorry can't remember which. 782205ERL Earl's Vapor Guard? Hose End 782252ERL Earl's Vapor Guard? Hose End 782256ERL Earl's Vapor Guard? Hose End __________________ Corvette95 Registry and Forum (*************) 1989 C4 Conv Wht/Gry Auto Hardtop Top Flight SOLD 1995 C4 Coupe Purple/Blk 6 Speed 1989 C4 Conv Wht/Red Auto SOLD 1996 C4 Conv Black/Tan Auto SOLD 1994 C4 Coupe Wht/Blk SOLD 1995 C4 ZR-1 White/Gry #278 Dual Dunn Head SOLD 1986 C4 Coupe Black/Red 4+3 SOLD 1990 C4 ZR-1 Red/Red #0454

08-08-2020	#20
ZuggZR1 Join Date: Jul 2019 Location: Holly Springs, NC Posts: 91	Re: Cooling Port for 1990 Lt5 JB weld held and yes it happened while driving the Engine started to over heat __________________ George Zugg 1990 DRM 500 ZR1 build#952

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