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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: 1,636
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: 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: Electrical 12-16-2020, 10:11 AM
Replies: 7
Views: 2,835
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 06-24-2020, 08:28 AM
Replies: 26
Views: 6,032
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: 48,725
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: 4,678
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: 48,725
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: 48,725
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: Overhaul 05-07-2020, 09:31 AM
Replies: 185
Views: 48,725
Posted By thatch
A word of caution

Excellent looking A4. Please avoid the temptation to use the stock
"lifting ring/alternator mount bracket" as a lifting point for re-installing your engine. The leverage factor between the large...
Forum: Ignition System 05-03-2020, 07:13 PM
Replies: 41
Views: 10,379
Posted By thatch
If it were my distributor, I would pull it and...

If it were my distributor, I would pull it and completely clean it, however, before pulling it I would replace the rotor and make a mark showing which direction it is pointed. I would then make two...
Forum: Electrical 04-30-2020, 10:04 AM
Replies: 11
Views: 3,922
Posted By thatch
Coolant flow?

In general, the coolant or waterflow is more active toward the thermostat or water-outlet end of the head. Because of this, it may just be a case of heat transfer to a hotter part of the head. ...
Forum: Cooling System 04-21-2020, 10:07 AM
Replies: 32
Views: 11,438
Posted By thatch
Hi, I agree with the others that there is a flow...

Hi, I agree with the others that there is a flow problem on the coolant side of the engine. In an tight installation like this, I would tend to look for the easiest things to check first. Since the...
Forum: Cooling System 12-09-2019, 10:51 AM
Replies: 17
Views: 3,636
Posted By thatch
Recently while freshening up an early model A4, I...

Recently while freshening up an early model A4, I found that virtually all of the studs that went into a water jacket, had been shortened just as Don describes. The material under those studs was...
Forum: Introductions 12-07-2019, 09:58 AM
Replies: 12
Views: 8,530
Posted By thatch
RobbyBobby, Welcome to the group. Your story...

RobbyBobby, Welcome to the group. Your story sounds very similar to mine ten years ago. After acquiring my '78 Catalina 30, I motored about 8 hours from San Pedro to Marina Del Rey. By that time...
Showing results 1 to 25 of 136

 
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