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Search: Posts Made By: thatch
Forum: Troubleshooting 10-09-2023, 11:00 PM
Replies: 17
Views: 1,785
Posted By thatch
"Four"ensics

Jim, Please don't beat yourself up too badly over misreading this engine's problem. It is quite common for the group to speculate widely before homing in at the root of a problem before collectively...
Forum: Cooling System 10-09-2023, 12:20 PM
Replies: 2
Views: 615
Posted By thatch
Hi, Center to center bolt hole spacing on a late...

Hi, Center to center bolt hole spacing on a late model A4 thermostat housing is
2-7/8", hope this helps.
Tom
Forum: Troubleshooting 10-07-2023, 10:20 AM
Replies: 17
Views: 1,785
Posted By thatch
Terminal

Hi, And a rather "dubious", welcome to the forum. Dave's assessment of what those parts are is correct. A quick look at my "paperweight A4 piston" verified that the round object is definitely the...
Forum: Fuel System 07-06-2023, 10:03 AM
Replies: 10
Views: 1,171
Posted By thatch
One thing that has not yet been mentioned is the...

One thing that has not yet been mentioned is the flame arrestor. Removing it for testing or cleaning it with carb cleaner will eliminate it as a possibility.
Tom
Forum: Cooling System 12-13-2022, 02:48 PM
Replies: 13
Views: 2,669
Posted By thatch
Thick shoe vs. thin shoe, my two cents.

Get comfortable, this may take a while. Over the years I have used most of the popular brands of flexible impeller pumps and they have all worked quite well. Almost without exception they all had...
Forum: General Interest 08-23-2022, 07:37 PM
Replies: 9
Views: 1,637
Posted By thatch
Shawn, Sorry to hear that you will be saying...

Shawn, Sorry to hear that you will be saying goody to "Twice Around".
The important thing is that you will still be "Messing around in boats". It has been a pleasure reading your posts (almost...
Forum: Electrical 08-11-2021, 07:26 PM
Replies: 69
Views: 9,742
Posted By thatch
My day is better for having seen that. ...

My day is better for having seen that.
Thanks, Tom
Forum: General Interest 07-30-2021, 12:39 PM
Replies: 6
Views: 1,961
Posted By thatch
Robert, Before removing the water-jacket side...

Robert, Before removing the water-jacket side plate, I would do the pressure tests and then proceed directly to things like the ignition and fuel system. The rebuilder should have cleaned the...
Forum: General Interest 07-30-2021, 11:45 AM
Replies: 6
Views: 1,961
Posted By thatch
Hi Robert, and welcome to the forum. It is quite...

Hi Robert, and welcome to the forum. It is quite possible that the engine was in sound enough shape that boring the cylinders and replacing the pistons was not necessary. The A4 is a "long Rod, low...
Forum: Troubleshooting 06-23-2021, 11:04 AM
Replies: 9
Views: 1,861
Posted By thatch
"Accidental Test"

Recently, while taking a late afternoon harbor cruise, I accidentally performed a "test" which may add a little interesting info to this conversation. My alternator is a 105 amp, single wire Delco...
Forum: Cooling System 03-23-2021, 02:17 PM
Replies: 23
Views: 4,364
Posted By thatch
One last tidbit

Before installing the pump cover, I always lubricate the inside of the pump with either liquid hand or laundry soap. It does two things, first, it tends to close small gaps which will increase it's...
Forum: Cooling System 03-21-2021, 09:25 AM
Replies: 23
Views: 4,364
Posted By thatch
I believe that scratchee hit the nail on the...

I believe that scratchee hit the nail on the head. If there is even the slightest air leak in the intake route, these flexible vane pumps will almost always refuse to pump.
Tom
Forum: Drawings and Schematics 03-16-2021, 10:16 AM
Replies: 5
Views: 6,238
Posted By thatch
Bill, Wow!

Bill, Wow!
Forum: Good Guys 03-14-2021, 12:45 PM
Replies: 14
Views: 4,419
Posted By thatch
Doug, Check your PM's Tom

Doug, Check your PM's
Tom
Forum: Troubleshooting 03-13-2021, 09:42 AM
Replies: 31
Views: 8,042
Posted By thatch
Re: "Voyage to the Bottom of The Sea"

Ronstory, "On set" picture taking has always been a definite "no-no", so I have very few photos from "the biz". This policy was for publicity reasons to protect the secrecy of movies and TV shows...
Forum: Troubleshooting 03-12-2021, 11:33 AM
Replies: 31
Views: 8,042
Posted By thatch
Re: post #23

Ronstory, Working on that show from time to time was an absolute kick. Some of my favorite scenes were the ones where they would rock the camera to the right and have the actors run to the left...
Forum: Fuel System 12-22-2020, 09:16 PM
Replies: 10
Views: 2,187
Posted By thatch
Slash Tube, the long answer

Hi John, There are definitely two schools of thought regarding the "passive" breather tube, also known as the slash tube and a PCV system. They both attempt to remove crankcase gasses, AKA blow-by,...
Forum: Electrical 12-16-2020, 10:11 AM
Replies: 7
Views: 2,837
Posted By thatch
The short and "long, long, long answer"

The short answer is yes, the alternator does turn in the same direction as the flywheel. Now for the long answer. Recently, while mocking up an engine for another application I found that, because...
Forum: Troubleshooting 07-14-2020, 09:41 AM
Replies: 6
Views: 1,936
Posted By thatch
"Think thick milkshake"

My theory on this phenomenon has to do with the A4's relatively small oil-pump intake fitting size. When the oil is cold, and at it's thickest, it cannot easily make it through this fitting...
Forum: Troubleshooting 06-24-2020, 08:28 AM
Replies: 26
Views: 6,034
Posted By thatch
One part of this equation that has not been...

One part of this equation that has not been addressed is Muntasel's comment in post #1 about a possible charging system problem. If it is an over-voltage situation, along with it would come higher...
Forum: Overhaul 05-20-2020, 09:15 PM
Replies: 185
Views: 48,741
Posted By thatch
I've always been interested in the evolution of...

I've always been interested in the evolution of this little motor, so I guess that makes me a "Californian, Afourian, Historian". Bada,Boom.
Tom
Forum: General Interest 05-20-2020, 09:39 AM
Replies: 22
Views: 4,680
Posted By thatch
"Dental floss?"

Recently, while doing some work on a friend's boat, I discovered a very creative way to make an "O" ring of sorts. Someone had wrapped about 25' of dental floss around a shift lever shaft that...
Forum: Overhaul 05-16-2020, 04:43 PM
Replies: 185
Views: 48,741
Posted By thatch
Firing order quiz

If you don't already know why the firing order is 1243, do a little research on the "flat crankshaft" and impress your friends on the dock. Almost everyone has made the firing order mistake at least...
Forum: Overhaul 05-13-2020, 01:34 PM
Replies: 185
Views: 48,741
Posted By thatch
PCV?

One element that has a direct affect on the idle capabilities of an A4 is whether or not it has a PCV system. If a relatively healthy A4 has a clean carb and has been set to factory ignition specs,...
Forum: Ignition System 05-08-2020, 06:15 PM
Replies: 26
Views: 9,627
Posted By thatch
Dave, I was pretty sure that you would have...

Dave, I was pretty sure that you would have played with them.
Tom
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