336D injectors

Car Doc · Feb 10, 2012

Looks great Vern I bet it will run great too!

Interesting fact I noticed in the pics your cyl head casting is the same as mine-3t90. I like that it means they are maybe more common if I ever need one.

Vern · Feb 11, 2012

Tried to check compression but my Gage from Harbor freight will not hold pressure, that's what get for going cheap. Got every thing but the exhaust and the intake back together before the rain started. Could snow tonight, can't complain, its been a mild winter.

Vern · Feb 12, 2012

Finished butting everything back together and started it. Middle cylinder is still not firing. Have 460 Lbs compression in the front cylinder, 250 in the middle, and 440 in the rear. Hooking up air to the middle it is very hard to hear where it is escaping, if i bump the cylinder it changes the sound of air. If I put the valve cover on it muffles the sound which leaves me to believe it is the cylinder sleeve.
Thought on how to proceed?

winston1 · Feb 12, 2012

Reworked head, valves properly adjusted. Sounds like ring blow by. All your liners even at top of block?

Vern · Feb 12, 2012

Yes they are or just above - thousands of an inch.

284 International · Feb 12, 2012

I don't see how the sleeves could be passing air pressure in a manner that the valve cover could muffle the sound unless the head were cracked. I think it is more likely your valves are not properly adjusted or installed: if pressure is coming out the valve cover, the only way that could occur is if there is an unintended opening from the top of the head into the cylinder. It seems more likely that your valves aren't correct than there is a substantial head crack under the valve cover.

careyo63 · Feb 13, 2012

Put some ATF or Trans fluid in the Cyl. and pump it up. It's Red and can easily be seen leaking out at the leak. Don't see it coming out of the Valves or the Valve Guide Seal your going to have to pull off the oil pan and look for the ATF leaking out through the Rings on the Piston and or leaking Down the Cyl. Wall. Again thats why I use Red ATF if you don't see it be ready to get "P,O" your be pulling the Head off again. Been there Done it

Vern · Feb 13, 2012

I beleive the air I am hearing is coming from the openings for the push rods, when I put the valve cover on it muffles it.
The Red atv sound like good advice, I will try that ASAP/

Thanks

Car Doc · Feb 13, 2012

Just my advice take it or leave it Vern and fwtw sorry to hear it. btw I mentioned tearing it the rest of the way down earlier. (I would have mentioned this next advice had you said you were tearing it clear down fwtw. I talk too much anyway its hard to get every single detail out on a post or 10)

I have seen quite a few engines that have ran with bad valves. More often than not if they have ran a looong time missing they will wear the ring grooves out in the pistons and rings wont fix it. It will need a new piston and rings on the one cyl.

As easy as these are pulling it back down at this point and re-ring all and pay real close attention the the ring grooves on #2 I think you will see what I am talking about all the pour in junk in the world will not make it run right. hth

Vern · Feb 13, 2012

I figured it would be another tear down. But I have a question - can the pistons be removed from the bottom of the oil pan or do they have to come out through the head?

Thanks