How much retaining compound to replace injector cups?
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Tuned
Joined: Aug 2010
Posts: 343
Likes: 7
From: Arizona
How much retaining compound to replace injector cups?
I'm going to be replacing all 8 of my injector cups. On Rock Auto they have a .2 ounce tube of Permatex 64000 sleeve retainer compound for $5. Local stores don't have this (or Loctite 620) in stock. Is .2 ounce enough to do all 8 cups or should I get 2 of them?
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Tuned
Joined: Aug 2010
Posts: 343
Likes: 7
From: Arizona
Wow, that one from Riffraff is expensive. I guess I'll get 2 of the little ones. BTW, I found on Rock you can get a 1.22 ounce bottle of the Permatex stuff, #64040, for $18. But I don't think I need that much.
Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Permatex is not what you want. It isn’t the quality needed for doing cups, loctite is superior.
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Tuned
Joined: Aug 2010
Posts: 343
Likes: 7
From: Arizona
https://www.permatex.com/wp-content/.../tds/64000.pdf
https://www.henkel-adhesives.com/us/...ctite_620.html
Because racetruck
Joined: Apr 2007
Posts: 2,786
Likes: 104
From: Monterey Bay, CA
Got supporting evidence? The Permatex appears to have much higher temperature resistance.
https://www.permatex.com/wp-content/.../tds/64000.pdf
https://www.henkel-adhesives.com/us/...ctite_620.html
https://www.permatex.com/wp-content/.../tds/64000.pdf
https://www.henkel-adhesives.com/us/...ctite_620.html
Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
Mainly personal experience as I have had to replace cups installed with Permatex in the past. Temp is the same, 200ºC for Loctite and 400ºF for Permatex. Gap fill is better with Loctite. Once main indicator is that you will only find Permatex at places like Oreillys and Napa for general auto use as it is cheap and generic use. Loctite is found in professional applications like hydraulic stores, aviation, machining as well as what the Ford Manual calls for on this application.
Agree with you on this, You never ever want to do it again, SO buy once Cry once!
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Fleet Mechanic
Joined: Sep 2011
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From: Albuquerque
It may be expensive, but Riff Raff is not going to sell you junk! you never want to do this again!
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Former Vendor
Joined: Sep 2020
Posts: 2,597
Likes: 695
From: Florence, MT
Less expensive than doing it twice! We only sell Loctite 620 to our customers installing cups. We also only recommend Clay's install/removal tool. We talk to many customers who buy the cheap junk on eBay and have to do the job again.
Got Data?
Joined: Dec 2012
Posts: 4,274
Likes: 1,411
From: Lake Stevens, WA
I've used Clay's excellent tool set, and loctite 620, and ended up doing the job 7 times (once all 8 cups, then chasing down leakers). The last two of those times were with the help of friends Woodnthings and Tugly.
The two big mistakes I made: Not cleaning the holes adequately so the loctite could bond well, and not pressure testing properly when I discovered the 1st attempt was not successful. I was not able to identify all of the leakers at once. It helps to have no antifreeze in the block to check your work. Easier to see air bubbles around a leaking cup sprayed with silicone, than to see weeping antifreeze on the cup edge.
The two big mistakes I made: Not cleaning the holes adequately so the loctite could bond well, and not pressure testing properly when I discovered the 1st attempt was not successful. I was not able to identify all of the leakers at once. It helps to have no antifreeze in the block to check your work. Easier to see air bubbles around a leaking cup sprayed with silicone, than to see weeping antifreeze on the cup edge.
Fleet Mechanic
Joined: Sep 2011
Posts: 1,613
Likes: 106
From: Albuquerque
I've used Clay's excellent tool set, and loctite 620, and ended up doing the job 7 times (once all 8 cups, then chasing down leakers). The last two of those times were with the help of friends Woodnthings and Tugly.
The two big mistakes I made: Not cleaning the holes adequately so the loctite could bond well, and not pressure testing properly when I discovered the 1st attempt was not successful. I was not able to identify all of the leakers at once. It helps to have no antifreeze in the block to check your work. Easier to see air bubbles around a leaking cup sprayed with silicone, than to see weeping antifreeze on the cup edge.
The two big mistakes I made: Not cleaning the holes adequately so the loctite could bond well, and not pressure testing properly when I discovered the 1st attempt was not successful. I was not able to identify all of the leakers at once. It helps to have no antifreeze in the block to check your work. Easier to see air bubbles around a leaking cup sprayed with silicone, than to see weeping antifreeze on the cup edge.
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