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pitted thermostat housing seat
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chas
User
Dec 8, 2016, 9:44 PM
Post #1 of 20
(6410 views)
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pitted thermostat housing seat
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94 toyota 22re pitted aluminum thermostat housing cup seat where the thermostat sits in the cup with a rubber gasket around the thermostat.
I looked around at the auto parts stores. I need to use something that is gasoline, oil, antifreeze resistant and take the heat with a 180 thermostat.
I would like to repair the seat cup proper without using goop, silicon or anything sloppy. Goop or silicon wont work for this.
I was thinkin about using JB weld with several applications over a few days and let it set for 24hrs.
It's maybe the only thing i could come up with that might work for this application.
what do you guys recommend to build up the aluminum thermostat housing seat that has been lost to pitting and time?
These pics are close enough to give you an idea how the thermostat is designed. The thermostat sits in the cup with the rubber gasket around the lip of the thermostat. The top housing is flat compressing the rubber gasket in the seat with (2) 12-14mm bolts. The cup seat has been worn down from pitting and time.
Link deleted ............... not allowed
(This post was edited by Hammer Time on Dec 9, 2016, 6:19 AM)
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 9, 2016, 1:29 AM
Post #2 of 20
(6395 views)
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Re: pitted thermostat housing seat
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Your picture - may not show directly>
>
You can get a replacement for the top part/side part of them (ask for "housing") or if clean and dry and pits not out of control the Permatex brand gasket sealer and maker product will tolerate all the normal temps that would be there.
I'm not going to look it up but why 180F thermostat? Almost everything really wants and needs over 190F (195F most common) for engine to run properly,
T
(This post was edited by Tom Greenleaf on Dec 9, 2016, 1:35 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 9, 2016, 6:20 AM
Post #3 of 20
(6378 views)
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Re: pitted thermostat housing seat
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Things like that are not repaired. The component is replaced.
I'm sure a machine shop may be able to fix it correctly but it would be cheaper to replace it.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 9, 2016, 7:24 AM
Post #5 of 20
(6363 views)
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Re: pitted thermostat housing seat
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I suspect his issue is with the intake manifold side of things.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 9, 2016, 7:37 AM
Post #6 of 20
(6356 views)
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Re: pitted thermostat housing seat
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Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Dec 9, 2016, 7:38 AM)
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kev2
Veteran
Dec 9, 2016, 10:20 AM
Post #7 of 20
(6334 views)
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Re: pitted thermostat housing seat
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OOPs
I will read and improve comprehension
I will read and improve comprehension
I will read and improve comprehension
I will read and improve comprehension
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 12, 2016, 5:27 PM
Post #9 of 20
(6297 views)
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Re: pitted thermostat housing seat
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Powder coating is not a spray product. Automotive parts are not powder coated.
That manifold looks like just stripped clean aluminum.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Discretesignals
Ultimate Carjunky
/ Moderator
Dec 12, 2016, 5:48 PM
Post #10 of 20
(6287 views)
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Re: pitted thermostat housing seat
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Looks like the picture was taken off the server it was linked to. That manifold may have been bead blasted.
As HT stated a machinist might be able to repair it by welding and machining a new surface. You also might get lucky and find a good used one.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 13, 2016, 12:30 AM
Post #11 of 20
(6275 views)
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Re: pitted thermostat housing seat
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Chas - How bad is the pitting? Saw the pic in a the link before removed didn't help as it wasn't yours. Post one of yours. Many are dirty - some pits -and so what you just clean that off, grease with water proof grease and go or the sealer I mentioned.
Short of a crack I can't believe this is that much trouble,
Tom
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 13, 2016, 8:17 AM
Post #13 of 20
(6253 views)
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Re: pitted thermostat housing seat
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Even with an excellent picture it would be difficult to be sure but this isn't usually (my own experience for ages) usually a real trouble spot. Something is all wrong like the part and the gasket isn't right in this case the rubber might not be good. Teflon tape is the wrong thing to use BTW for this.
If this is just pits and you can just scrape it clean, dry it with even a cloth soaked in like carb cleaner not to get that into coolant it would take the gasket maker I already spoke of.
Let that stuff dry a day if needed. If in a cold area working it will fail.
Idea for carrying on: Clean the surface with a small gasket scraper aptly named to do just that. You can make a decent one out of a junk screwdriver and a grinding wheel or buy one. Then you can see what you are really up against. Easy on alloys and aluminum as scrapers will gouge those metals and make a problem you didn't have.
Is the cover warped? Check with a straight edge. Understand you probably don't have tools up the butt so use a known straight edge of something and look. I mean the housing now that you can get a new one of. If that got overtightened, bent or something the fight with pits isn't it.
Just a warning with the gasket maker product(s) you may find I chose a name brand and would seek that. Use just enough no more if at all. Let it dry totally such that it isn't wet as once you put things together it isn't going to dry more.
Check that something - part or gasket you are using is correct. This is just seeming like too much trouble for you and my guess is there's a problem more than what you see,
T
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chas
User
Dec 13, 2016, 9:23 AM
Post #14 of 20
(6247 views)
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Re: pitted thermostat housing seat
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tom, you are going too far. The upper housing is good and the rubber o-ring is good. The problem is the cup seat. Its worn down from pitting and some corrosion. your suggestion of a home made gasket material from the parts store might work. Do you think the gasket material will take the constant submersion in anitfreeze and 180 plus temp?
(This post was edited by chas on Dec 13, 2016, 9:28 AM)
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Hammer Time
Ultimate Carjunky
/ Moderator
Dec 13, 2016, 10:37 AM
Post #15 of 20
(6239 views)
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Re: pitted thermostat housing seat
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This really shouldn't be a big deal to seal. The factory designed this to seal using the O-ring around the stat only but you still have a flat surface outside of the O-ring. Why can't you just make a gasket for that surface to use in addition the to O-ring? You can use a thin coat of silicone on the gasket to seal any pitting in that area.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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Tom Greenleaf
Ultimate Carjunky
/ Moderator
Dec 13, 2016, 11:52 AM
Post #17 of 20
(6223 views)
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Re: pitted thermostat housing seat
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Chas - like we are on to this shouldn't be a hassle. The "toothpaste" tube of gasket maker you just use the least to fix tiny flaws. It can be removed if you don't like it and will tolerate all but exhaust temperature and there's a product for that too.
Refresh on the probably just two bolts or nuts to hold the cover down: If those ever were or you did way overtighten them you wrecked it! That's why I want you to check that it's not bent. If alloy and is on this it wouldn't bend back.
Take ruler, a metal one or put it on known glass, counter top - whatever it takes to know it doesn't have bent ears if you will on it. If you can slide paper or worse a credit card under it it's messed up.
On your side - this shouldn't be hard at all IMO but as always not there looking myself,
T
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VON
User
Sep 29, 2017, 12:58 PM
Post #19 of 20
(5764 views)
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Re: pitted thermostat housing seat
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Chas, I've done this on Chevy trucks and it worked good w/ no problems for 15+ years. Buy a tube of Yamabond from a Yamaha motorcycle shop or online and follow the directions on the tube. On one badly pitted thermostat housing I put the Yamabond on thicker and let it set up until hard (3-5 days) and lightly resurfaced the housing on a piece of glass with 220 sandpaper until flat, but not sanding all the way through the Yamabond. Start with the housing surfaced as flat as you can before putting on the YB.
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Hammer Time
Ultimate Carjunky
/ Moderator
Sep 29, 2017, 1:16 PM
Post #20 of 20
(5762 views)
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Re: pitted thermostat housing seat
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This thread is nearly a year old. Please do not reply to old threads.
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We offer help in answering questions, clarifying things or giving advice but we are not a substitute for an on-site inspection by a professional.
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