5 replies to this topic

[Seabronc]

I just completed some major modifications to my engine, put stock 4bbl intake manafold back on, rebuilt and installed standard Ford holly 4bbl, changed some worn lifter parts to get rid of noise in that area, built and installed new vacuum harness, reinstalled all emission systems that were removed bya previous owner. Now my question.

When removing valve cover I found that area of the engine full of old oil gunk so I cleaned it up. When changing oil, before starting it again, I found fund gas in the oil. I would guess there was about a gallon or more based on the amount that I collected in a bucket. I was surpsrised but not too, because I had to replace the fuel pump which had a bad diaphram. The surprise was the amount of gas, talk about a truck bomb.

Yada yada yada! I was going to use Gunk Engine Flush to clean out the oil system, has anyone done that before? Good or bad results? It can only be left in for 5 minutes while running the engine and then you musst do a oil and filter change.

[sweepersrgr8]

Gunk Engine flush is nothing but kerosine. But works well if you have sludge build up. I put a quart of kerosine in at every oil change. Get the engine good and hot before adding. Run for 5 to 10 minutes, and change.

When I bought by Bronco, it had a valve cover leak, Man I had to dig handfulls of crap out of there. Just changed my lower intake gasket this weekend...looks like a new motor in there now.

Watch your oil pressure...in 3 oil changes, I went through 6 filters. Lets you know it's working.

[Seabronc]

Haven't done it yet. That is why I asked the question. I don't have a clue about the history of this engine. The leak possibility was in the back of my mind.

Thanks to the both of you for your input, still giving it some thought.

[sweepersrgr8]

I agree w/Redneck Punk.....All of my gaskets and seals are new(I can not stand the smell of burning oil).

Kerosine is only $1.50 a gallon, while GUNK is around $4.00 a quart.

Using a low weight oil, and replacing a quart w/ trans fluid is much easier on gaskets, and I have done this to stop a lifter from ticking. If your engine is as sludged up as you say.... I would go the Gunk or kerosine route a couple times first. If a gasket starts leaking..replace it.

Also, Did you clean the oil return passages through the head while you had the valve covers off?