67 Ford F600 56K original miles tappet noise

[69800]

I just bought this truck to plow snow around the farm. (300 cu in inline gas 6) Bought from original owner. Been used continuously for plowing and light dump truck work since new. Oil changed once a year with 15-40. Runs perfect except for one lifter takes about a minute to pump up cold then quiet as can be. I would like to use a cleaner to clear the lifter but am nervous in a virgin engine of this age. (never been apart). It will not get driven enough for AutoRX so anyone have a suggestion? Also What dino oil would you reco? (15-40?) Will be used for light dump work in summer and snow plowing in winter. Any ideas would be appreciated
thanks
Mark

 

[Fester]

Maxlife synthetic blend is what I would probably try, the seals on that engine must be dry, why not prestone motor flush then Maxlife.

 

[69800]

My main concern is creating oil leaks in the seals. Synthetic are pretty good at finding thier way out of old seals. I am still ponering the flush idea but I must say it does not sit to well with me. I am thinking about just leaving autoRX in it all the time.
mark

 

[oilboy123]

My choices
1st Auto-RX

Then Marvel Mystery oil
Or Rislone

A quick flush might work.

The best choice takes time like a fine wine........

 

[mechtech2]

The lifter is probably clean, since it works very well to leak down. And it is a leak down problem.
Maybe a slightly longer pushrod or adjustment will help.

 

[Johnny]

I would run the recommended amount of Marvel Mystery Oil in it for 25 hours of operation. Drain and fill with either Shell Rotella T 15W-40 or Chevron Delo 400 15W-40. Those are tough old six cylinder engines.

I notice you like Amsoil (Amzoil) products. Their 15W-40 blend is an excellent oil.

 

[Gary Allan]

Quote:
It will not get driven enough for AutoRX so anyone have a suggestion?


Pull the valve cover and find out which lifter is lazy. Then pull the side cover and remove that lifter. Soak it in solvent and (even) take the thing apart (snap ring). Put it back together after you've soaked it in oil. Put it back in. Tighten it to zero lash plus 1/2 turn (they spec more).

 

[demarpaint]

Gary's suggestion is fairly easy on that engine. My only question is why use something 15W? A 5W30, 10W30, or 10W40 will work well in that engine. It will flow better on cold starts, especially if the truck is used mostly for plowing during the winter. I would think 10W40 would be the best choice of the 3 oils for the summer, and one of the 30 grades for winter plowing.

If you don't want to pull the VC as Gary suggested I would use the MMO as Johnny said, it works very well up freeing up lifters.

Those engines last forever, probably one of Ford's best engines IMO.

 

[PT1]

I would do the MMO as suggested and switch to a 10w40 versus a 15w40 and see what happens.

 

[69800]

"The lifter is probably clean, since it works very well to leak down. And it is a leak down problem. "
Please explain this comment. What causes leak down. Will solvent work or since its easy to remove via side cover mabey replace?
If the oil hole is clean why so long to pump up?
thanks in advance
mark

 

[TallPaul]

My '84 F150 developed a lifter tick on start up around 170,000 miles (that with a quart of Rislone every oil change for the life of the truck). Don't recall if the tick ever was fixed, would go away after a while. Sold it to a friend who drove it to about 300,000 miles then sold it to a guy who was going to use the engine (body and frame were shot by then).

Some of the 300s, particularly in the bigger trucks, were HD versions. Not sure all he HD upgrades, but one was a forged steel crank, whereas the regular 300 got a nodular cast iron crank. That engine is happiest when doing hard work.

 

[mechtech2]

If it [lifter] never pumped up, it would be stuck, or maladjusted.
But it pumps up readily, and leaks down readily, so it is in no way stuck.
It has clearances that are a bit large, or a bad initial adjustment, therefore.

 

[ac_tc]

Use the HDEO you have on hand in your farm. As for the tic
live with it or check adjustments/change lifter im with
Mechtec2 here.

 

[69800]

Ok I know enough to close this thread.
Thanks All
Mark

 

[mva]

No so quick. 15W40 and plowing snow???

I would try something with a lower first number 5W40 or 0W40 for improved cold starts.

How about this 0W40 synth - it is very inexpensive here in Canada:

http://www.rrcoop.com/product_pdfs/2007SPEC/DMO_SL_Spec.pdf

 

[69800]

I will be using a block heater. Good thought though
mark