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Forum: Cooling System 06-04-2018, 09:44 PM
Replies: 11
Views: 3,927
Posted By BobinSF
Holes in my Head, continuing

Following up on my 01-01-2018 post about raw-water cooling 'pinhole' leaks in my head, and after dealing with several other engine issues, I went ahead and did the last option in the post, that is: ...
Forum: Cooling System 01-01-2018, 10:50 PM
Replies: 11
Views: 3,927
Posted By BobinSF
Holes in my Head

New Year’s greetings to all afourians.
After patching a large hole in my head last spring, my raw-(salt) water cooled A4 is running fine, but with one problem: the head now has had numerous...
Forum: Overhaul 05-01-2017, 10:33 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Finishing, hopefully, my broken manifold studs...

Finishing, hopefully, my broken manifold studs adventure, I completed the needle gunning and Dremel rotary brushing of rust down to bare metal without creating/findng any more holes. So I patched...
Forum: Overhaul 03-01-2017, 07:57 PM
Replies: 23
Views: 8,148
Posted By BobinSF
While needle scaling the head, I created/exposed...

While needle scaling the head, I created/exposed a hole into the water passage (pic). It seems to me that on this flat surface, I can do a durable repair by: making an inside and outside steel cover...
Forum: Overhaul 02-21-2017, 05:37 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Removing the mixing elbow from the manifold is a...

Removing the mixing elbow from the manifold is a piece of cake - a recip saw....

Al Schober, your method worked just fine; thank you.

Needle scaling is proceeding well, and I am able to do it...
Forum: Overhaul 02-19-2017, 06:45 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Happily, I was able to chase the manifold stud...

Happily, I was able to chase the manifold stud threads in the block to what seems their full depth, about 1/2 inch. The threads seem to be in good shape. So it appears that I can buy new studs,...
Forum: Overhaul 02-16-2017, 10:37 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Here are 3 photos: the manifold studs (actually...

Here are 3 photos: the manifold studs (actually bolts); and the holes for them in the block. On the hole to the left, the wider recessed area is about 1/16" deep.
Forum: Overhaul 02-13-2017, 04:12 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Thanks, Al and 'sastanley', for your helpful...

Thanks, Al and 'sastanley', for your helpful responses.

I disconnected the water inlet hose so now have about an inch between the block and the manifold; still not enough for useful photos. The...
Forum: Overhaul 02-08-2017, 08:10 PM
Replies: 23
Views: 8,148
Posted By BobinSF
Unhappy Broken Manifold Studs

While attempting to remove a threaded plug from the top of the exhaust mixing elbow, I felt something give way; I had broken all three of the studs holding the manifold to the block. The looked very...
Forum: Irwin 06-13-2015, 11:00 PM
Replies: 4
Views: 9,360
Posted By BobinSF
For future flushing, I bought 'Trac Descaler...

For future flushing, I bought 'Trac Descaler Barnacle Buster' from West Marine. The MSDS says it is phosphoric acid. The ad copy speaks of it being effective at removing all sorts of things. The ad...
Forum: Cooling System 06-11-2015, 11:10 AM
Replies: 10
Views: 3,495
Posted By BobinSF
Cooling System Capacity

Thank you all for your responses. I ended up doing a pressure flush per the manual, and I will remove exterior block and head rust and apply Rustoleum as an ongoing project.

For future flushing,...
Forum: Cooling System 06-08-2015, 11:18 PM
Replies: 10
Views: 3,495
Posted By BobinSF
Cooling System Capacity, Rust

On my raw water-cooled A4, I have installed the 'T' fitting between my raw water intake and the water pump, and am about to do full-strength vinegar flushes, as discussed in many threads and...
Showing results 1 to 12 of 12

 
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