LOST JEEPS :: View topic - Tastes like Lemon

You're not getting much water in the cylinders, otherwise you'd have hydrostatic lock. The engine would turn over until a cylinder with water in it hit the compression cycle and then it would crank no more. Engines don't tend to compress fluids well. With a small leak when running you'd be likely be pushing air/fuel into the cooling system causing bubbles and pushing coolant into the overflow tank. Also when it is running you would see white smoke from the coolant. Removing the glow plugs like Flash mentioned is a good test to be sure, but the head isn't something I would be worrying about based on your description.

The change in crank speed could also be related to your fuel problem. If there is no fuel pressure it would crank slower and then speed up as fuel starts reaching the injectors. The starter has to overcome the compression and it gets help when the engine starts to fire. You're looking at 17.5:1 compression compared to 9.5:1 for the gassers.

Author:	Over [ Fri Jul 03, 2015 3:06 pm ]
Post subject:	Tastes like Lemon
Well after lots of work the Jeep is just as broken as before...actually more so...kinda Issues now are a limp mode tranny (new issue!) and....hard to start, which is the same issue I bought it with, thinking it would be an easy fix. The hard to start has me worried the most. It seems to still have a fueling issue but that is most likely leaking fuel quick connects at the tank. A known and easy fix. The MUCH more troubling symptom is, after sitting for a day or so it doesn't want to turn over easily. First few revolutions act like the battery is weak, but it gets better, and faster, before it finally springs to life and runs beautifully. This tells me one thing: water is entering one or two of the cylinders when it sits, causing a higher compression that the starter has trouble overcoming. The implications are one of two potential problems. The head is cracked or warped somewhere I didn't see, or I messed up the head gasket replacement. The old head gasket showed signs of being the culprit before, however this now seems to be secondary to a main issue of a cracked head. I don't see how the new gasket clamped by ARP studs could have failed unless the head is badly warped. This issue wasn't present the first few times I ran the jeep post rebuild, so it very well could be a warped head that finally pushed water past the Permatex copper I sprayed on the new head gasket. Either way it is a disheartening situation. The only consolation is I could now probably have the head off within a few hours, and do the entire job in 2 days without removing the radiator or intercooler and all the front body parts.

Author:	flash7210 [ Fri Jul 03, 2015 3:28 pm ]
Post subject:	Re: Tastes like Lemon
If you suspect coolant leaking into the cylinders, an easy way to check is to pull the glow plugs and crank the motor with the injectors unplugged. Pressurizing the cooling system helps too. But if water comes shooting out the glow plug holes, you have found your problem. In my case, the head was cracked in the exhaust ports and although some of the water was leaking into the cylinders, the majority of it was flowing into the exhaust. I was able to verify this by removing turbo and exhaust manifold while keeping all the coolant lines attached. I then pressurized to cooling system and watched the water come dripping out the exhaust ports.

Author:	KC-CRD [ Fri Jul 03, 2015 5:24 pm ]
Post subject:	Re: Tastes like Lemon
You're not getting much water in the cylinders, otherwise you'd have hydrostatic lock. The engine would turn over until a cylinder with water in it hit the compression cycle and then it would crank no more. Engines don't tend to compress fluids well. With a small leak when running you'd be likely be pushing air/fuel into the cooling system causing bubbles and pushing coolant into the overflow tank. Also when it is running you would see white smoke from the coolant. Removing the glow plugs like Flash mentioned is a good test to be sure, but the head isn't something I would be worrying about based on your description. The change in crank speed could also be related to your fuel problem. If there is no fuel pressure it would crank slower and then speed up as fuel starts reaching the injectors. The starter has to overcome the compression and it gets help when the engine starts to fire. You're looking at 17.5:1 compression compared to 9.5:1 for the gassers.

Author:	Over [ Fri Jul 03, 2015 5:48 pm ]
Post subject:	Re: Tastes like Lemon
KC-CRD wrote: You're not getting much water in the cylinders, otherwise you'd have hydrostatic lock. The engine would turn over until a cylinder with water in it hit the compression cycle and then it would crank no more. Engines don't tend to compress fluids well. With a small leak when running you'd be likely be pushing air/fuel into the cooling system causing bubbles and pushing coolant into the overflow tank. Also when it is running you would see white smoke from the coolant. Removing the glow plugs like Flash mentioned is a good test to be sure, but the head isn't something I would be worrying about based on your description. The change in crank speed could also be related to your fuel problem. If there is no fuel pressure it would crank slower and then speed up as fuel starts reaching the injectors. The starter has to overcome the compression and it gets help when the engine starts to fire. You're looking at 17.5:1 compression compared to 9.5:1 for the gassers. Hummmm. I'll do some tests to see, I hope you're right....that's a lot less expensive of a problem.

Author:	geordi [ Fri Jul 03, 2015 9:04 pm ]
Post subject:	Re: Tastes like Lemon
What battery are you using? How new is it? These things have been known to have power drain issues (Welcome to Jeep) so that could also be part of it, but that wouldn't explain the starting slow and building faster. I don't think you have a water issue either, that would tend to show up in other ways. You might have a weak starter or even just bad grounds and possibly a poor positive cable on the battery itself. Hey, corrosion inside the cables happens. Just for grins, use a pair of jumper cables and clamp it to the battery negative and then to the engine body itself. It won't be as effective as a short ground cable, but if you feel a change in performance... You just found a potential. The ground points are critical, and people never check them for corrosion and rot. If there was ever a battery leak or crap sprayed up from the wheel well... The main ground could be compromised.

LOST JEEPS http://www.lostjeeps.com/forum/phpBB3/

Tastes like Lemon http://www.lostjeeps.com/forum/phpBB3/viewtopic.php?f=5&t=82530	Page 1 of 1

Author:	Over [ Mon Jul 06, 2015 11:15 pm ]
Post subject:	Re: Tastes like Lemon
Started it up today, turned over fine, took a while to start though no fuel. Fired up after some priming, ran fine. I let it idle till about 150 - 160 F turned it off came back 30 mins later Tried to start but it locked after one revolution. I'm guessing the heat opened up whatever crack is present and filled a cylinder enough to hydro lock. Pulling #1 glow plug to confirm.... looking of foreign used VM heads.... anyone know if casting # 90352038F is a good fit?

Author:	flash7210 [ Tue Jul 07, 2015 8:26 am ]
Post subject:	Re: Tastes like Lemon
why only #1 ? pull all 4 glow plugs Also, if you call or email VM Specialists and tell them you have a US Spec VM 2.8L the will get you the correct head for it. I too got lost in all the casting numbers, trying to figure out which was a 2.8 and not a 2.5L. VM Specialist got me the correct head with a 2007 date stamp for a really good price.

Page 1 of 1	All times are UTC - 5 hours [ DST ]
Powered by phpBB © 2000, 2002, 2005, 2007 phpBB Group http://www.phpbb.com/