Stanley Posted March 10, 2014 Share #1 Posted March 10, 2014 Less than 6 months ago put these Dorman caps on the heater tee and head (to heater) coolant outlet. They're already shot. Guess I'll use some tapered rubber plugs with a silicon rubber cap from M-C (clamped over the plugs) instead, until I get the heater hooked up. Link to comment Share on other sites More sharing options...
Zed Head Posted March 10, 2014 Share #2 Posted March 10, 2014 Do you have the part numbers? For future reference. Link to comment Share on other sites More sharing options...
240260280z Posted March 10, 2014 Share #3 Posted March 10, 2014 Typical mainland Chinese... looks like a cap, feels like a cap but it ain't. It's a polished turd that fakes a real cap.Mainland China specializes in this and they are very good at it. Now that their economy is cooling, they are using even more watering-down methods.Now I avoid everything I can from China or labelled "imported for".For your problem, use non-chinese hose ~ 4" and 2 hose clamps. Stick a stainless bolt in the end and clamp it. 1 Link to comment Share on other sites More sharing options...
Zed Head Posted March 10, 2014 Share #4 Posted March 10, 2014 Dorman is an America-based company. Ultimately they are responsible for specifying and controlling product qualities. To hash it over one more time - the off-shore companies just produce to the specs. they're contracted to produce to. This is an American issue entirely.Corporate InfoBut, all I really wanted to know is what Dorman designed the parts to do. Maybe you're using vacuum line plugs on the cooling system. Link to comment Share on other sites More sharing options...
Stanley Posted March 10, 2014 Author Share #5 Posted March 10, 2014 Just checked Dorman website. They call them vacuum plugs and also heater bypass plugs. When you click on the heater bypass plugs it also calls them vacuum plugs. Link to comment Share on other sites More sharing options...
Zed Head Posted March 10, 2014 Share #6 Posted March 10, 2014 Bummer. Dorman probably offers a lifetime replacement on those parts that don't work.If you're in a hurry you could loop a section of heater hose from one nipple to the other. Won't look pretty but you'll have the right materials in the right place. Link to comment Share on other sites More sharing options...
Stanley Posted March 11, 2014 Author Share #7 Posted March 11, 2014 (edited) Stopped by Ace hardware and got some tapered rubber plugs, two for the 5/8" ID hose barbs, and two for the 3/4" hose barbs. Hope I won't need the corkscrew to remove them. Hate to say it, but also got a packet of Dorman caps just so I can drive until the my silicon caps from M-C get here. Will also get a stainless steel BSPT plug for the water outlet. If I looped it I'd still need to cap the 3/4" end on the tee where the manifold heater line used to hook up. Might solder a metal cap on that one, since it's no longer connected to anything.Didn't see how bad that cap (and the other caps) was until I uploaded that shot and checked it out on the computer. Probably saved me a call to the tow truck.Weather is warming up, so fixing the heater is moving down on the "to do" list. Edited March 11, 2014 by Stanley Link to comment Share on other sites More sharing options...
djwarner Posted March 11, 2014 Share #8 Posted March 11, 2014 If you are talking about a classic cork shape, I'd worry about them popping out under pressure. I were you, I'd use the classic approach of using 2" of hose, a short bolt, and two hose clamps. Link to comment Share on other sites More sharing options...
John Coffey Posted March 11, 2014 Share #9 Posted March 11, 2014 Silicone caps from McMaster-Carr. Good to 600 degrees F and 300 psi. Link to comment Share on other sites More sharing options...
Stan2 Posted December 25, 2019 Share #10 Posted December 25, 2019 Great info regarding the caps! And the Silicone caps from McC would fit the bill more than likely. I went with the 2" piece of radiator hose and a #8 bolt for $2.80 -Thanks! 2 Link to comment Share on other sites More sharing options...
heyitsrama Posted December 25, 2019 Share #11 Posted December 25, 2019 definitely not the way to do it, but i've used a large spark plug to plug up a heater hose... Link to comment Share on other sites More sharing options...
AK260 Posted December 25, 2019 Share #12 Posted December 25, 2019 I’ve used copper end caps with a piece of copper pipe soldered in and a jubilee clip to great effect. The PO had used the bolt method which had corroded a lot reacting with the coolant. The copper method works a treat and totally heat proof! https://rover.ebay.com/rover/0/0/0?mpre=https%3A%2F%2Fwww.ebay.co.uk%2Fulk%2Fitm%2F121665667956 2 Link to comment Share on other sites More sharing options...
Wilbur
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