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  #26   IP: 24.61.95.61
Old 11-22-2020, 07:26 PM
ArtJ ArtJ is offline
 
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My instinct is to only torque the two studs and leave the rest alone.

I would start at 25 wait then later 30 still later 35 . These studs have full 6 new strong threads all the way thru

so there shouldn't be any problem with them holding especially after jb weld sets.

The reason not to mess with the others is not to create any possible more weak studs.

I understand the reluctance, but I think it will be fine if I do it gradually Just need to give

the gaskets a chance to settle in.

It is common to regularly redo the thermostat studs without issue.

If there was going to be a issue it would have already occurred with 2 loose studs

Just looked it up sequence of torqueing is to provide a even seal and avoid head permanent warping

in my case if this would have already occurred by 2 studs not tightening anyways

but also during useful life use they need to be evenly torqued to prevent warping over time and leaking gasket

I am now thinking I should apply some small 25 ? torque tomorrow (3 days after installing studs) rather than continuing to allow possible warping - there are now good threads. The waiting may be doing more possible (warping) damage than JB curing now only using jb as a sealant since have good threads now.

Just torqued them in stages both to 35 - the same as all the rest.

They held it fine

n a couple of days when warming, I wll run engine using antifreeze
recycling in a bucket. I will then retorque. If have time l will repeat the cycle 3 times. I am reluctant to acid flush now since sealants are new.
I did clean oval passages and have been keeping the engine in antifreeze
for over 10 years. I will acid flush in spring.

Best
Art

Last edited by ArtJ; 11-22-2020 at 07:29 PM. Reason: typo
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  #27   IP: 24.61.95.61
Old 11-27-2020, 03:38 PM
ArtJ ArtJ is offline
 
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Ran the engine today in a bucket of 50/50 antifreeze. Engine started up immediately.

ran about 20 minutes till antifreeze in bucket got hot. The only minor issue noticed was

from minor seepage around thermostat gasket later added Permatex to gasket and reassembled it.

After cool down rechecked head nuts only very minor re-torque required.

Replaced alternator stud that was slightly too short added new JBWeld to stud threads re assembled and lightly torqued.

Put engine away till spring will continue to check torque a couple more times then and do a acid flush. rinse out and add antifreeze.


Best Art
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  #28   IP: 134.41.89.226
Old 11-27-2020, 05:21 PM
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Yes, I'd definitively wait until spring before acid wash. When I do an acid wash I run fresh water through (not recycled in a bucket) for about 20 minutes. Don't want any resemblance of acid sitting in a stowed engine for sure.

Seems like you did fine Art...good job.
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  #29   IP: 24.61.95.61
Old 11-28-2020, 05:24 PM
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Thanks Mo

I noticed a amount of wear as well as buildup in the head receptor for the thermostat

I scraped and cleaned up a little more added permatex to all mating surfaces and gasket.

I am thinking that this is what prevented a complete seal for t stat housing.

Stay safe all

Art
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  #30   IP: 24.61.95.61
Old 11-29-2020, 09:19 AM
ArtJ ArtJ is offline
 
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Further detail regarding thermostat seat .
The lip/ring/ seat in the head was completely worn thru for approximately 1/2 inch.
As mentioned I coated all surfaces with permatex, including the lip of the
bottom of the thermostat itself in hope of sealing the void.
In the spring I will know if this was sufficient, otherwise will need to rebuild
the seat with JB Weld.

Best Art
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  #31   IP: 24.61.95.61
Old 12-01-2020, 09:22 AM
ArtJ ArtJ is offline
 
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Exclamation insertable snap in replacement seat ring

I was just thinking wouldn't it be nice if a user insertable replacement
thermostat seat ring was available for the head that could just snap in with sealant?
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  #32   IP: 38.27.109.137
Old 12-01-2020, 10:32 AM
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Someday, somebody is going to start 3D-printing parts like this, pretty much made to order, limiting pre-production costs and inventory builds when there is no expectation of significant unit sales.

Bill

Last edited by W2ET; 12-01-2020 at 10:35 AM.
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  #33   IP: 104.174.83.118
Old 12-01-2020, 10:48 AM
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The bigger picture

The condition of the thermostat seat may be a harbinger of other internal deterioration not visible. Same head, same coolant passages, same coolant, same age, same history. There is little reason to expect damage to be limited to just one area.

Sorry to be a Debbie Downer.
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  #34   IP: 24.61.95.61
Old 12-01-2020, 11:38 AM
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Thanks guys
Points taken
In this case it seems as though the seat damage may have been the result
of excessive scraping as the rest of the head appears in quite
excellent shape

Best
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  #35   IP: 24.61.95.61
Old 12-02-2020, 09:52 AM
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I was thinking - If someone wanted to have a overlay for the seat ring maybe it would be feasible to fabricate one from a large flat washer( using drill press, round file or a stamp/hole cutter) and simply jb weld it over the remains of the original worn seat?
Taking care to maintain proper depth for thermostat
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