300tdi steam engine! Help!

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punkinracer
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300tdi steam engine! Help!

#1 Post by punkinracer » Tue Aug 08, 2017 9:50 am

Ok here is the story. Thought I blew a head gasket a couple months ago, truck was pushing steam quite a bit but never over heated - well at least on the gauge anyway. So whipped the head off and the gasket looked ok and the head surface wasn't bad. Got the head pressure tested and skimmed anyway just in case, the block surface looked fine but I never checked it for square. There was a bit of coolant in #4 exhaust port so I made sure the machine shop had a good look there, but they said it was all good. I put it all back together this weekend with a new e-ring gasket and it is still chuffing steam! Totally choked now! Now what? Talked with the machine shop and they were 99 percent sure there isn't an issue with the head, they do test it at room temp but at 45psi you would think it would have shown a crack if there was one. Block surface did look ok, and I've never heard of a 300tdi block twisting or cracking so I'm not sure what is going on here. I might do a leak down test before I rip in to it again but that would only isolate which cylinder not the block or head. anyone else have any other ideas to rule one or the other out?
Thanks,
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

rezdiver
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Re: 300tdi steam engine! Help!

#2 Post by rezdiver » Wed Aug 09, 2017 9:07 am

going back to the beginning, can you definitely confirm steam and not white smoke.

was it all the time? hot or cold engine.. high or low rev...
Cheers, Reza

2008 LR3

punkinracer
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Re: 300tdi steam engine! Help!

#3 Post by punkinracer » Wed Aug 09, 2017 10:22 am

Yeah its steam, smells like antifreeze not diesel. Hot or cold, same. More noticeable when at a light and idling, can't see the steam when driving but I think that is because it blows away quickly.
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

punkinracer
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Re: 300tdi steam engine! Help!

#4 Post by punkinracer » Wed Aug 09, 2017 11:40 am

Think I'm going to pop the head off again and take a look. Might try to cobble up something to block the water passages of the block with the head off and supply some air to the block drain, worth a shot. If anything it would answer whether the block is cracked or not.
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

red90
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Re: 300tdi steam engine! Help!

#5 Post by red90 » Wed Aug 09, 2017 12:26 pm

You are smelling coolant at the exhaust outlet? If you are truly getting coolant into a combustion chamber, there are a couple of things you can do to check.

First leave the rad cap loose so there is no pressure. The coolant then can't get in and your steam should stop. In addition, you should be getting combustion gas into the coolant and it should bubble. It is usually pretty strange to get coolant into a cylinder when running as the cylinder pressures are very high compared to the coolant pressure.

Second, a cylinder will fill with coolant after being parked. You would hydrolock on starting one day.... Pull the glow plugs and see if coolant sprays out when the engine is turned. You can pressure the coolant with a tester when warm as well.

punkinracer
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Re: 300tdi steam engine! Help!

#6 Post by punkinracer » Wed Aug 09, 2017 2:26 pm

Thanks Red, I'll give that a go before pulling the head, again!
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

punkinracer
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Re: 300tdi steam engine! Help!

#7 Post by punkinracer » Fri Aug 11, 2017 8:51 am

So I put about 15psi into the coolant system and coolant was puking out the #4 exhaust port. Then I put a gauge on the #4 glow plug port then applied pressure again, nothing reading on the gauge but coolant still coming out the port. That leads me to belive the gasket and block are fine but the head is toast. Now to have a little chat with the shop that pressure tested the head in the first place!
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

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bsa_m21
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Re: 300tdi steam engine! Help!

#8 Post by bsa_m21 » Fri Aug 11, 2017 9:23 am

Before contacting them, I'd verify that the exhaust valve is closed and then do a retest. If it is still puking, then your head has problems. If not, it's likely a head gasket. No?
Martin
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'80 Triumph TR7v8 (Rover 4L) - Myrtle

punkinracer
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Re: 300tdi steam engine! Help!

#9 Post by punkinracer » Fri Aug 11, 2017 9:52 am

No the head is done. The valves were closed with pressure supplied to the coolant system, so with the gauge in the glow plug port showing zero, the gasket, cylinder and the combustion chamber are fine I would think.
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

red90
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Re: 300tdi steam engine! Help!

#10 Post by red90 » Fri Aug 11, 2017 3:36 pm

Bummer. At least new heads are still being made.

punkinracer
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Re: 300tdi steam engine! Help!

#11 Post by punkinracer » Mon Aug 14, 2017 8:38 am

Yeah it happens, never good timing! Lucky enough Jeremy has one in stock so I'm not waiting for cross the pond shipping! Thanks for every ones help!
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

BuckBlue90
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Re: 300tdi steam engine! Help!

#12 Post by BuckBlue90 » Sun Aug 20, 2017 9:21 am

Pat,
Have not checked in recently so only just noticed this.
Did you have a word with the shop?
For those of us on the Island it would be useful to know which shop you used.
Eric.

punkinracer
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Re: 300tdi steam engine! Help!

#13 Post by punkinracer » Mon Aug 21, 2017 8:42 am

Well I've always used Thompsons if I can't machine things myself, and I've never ever had a problem with them. Fraser has always been awesome, unfortunately he was away on vacation when I dropped the head off, maybe that had something to do with it? Well shit happens! I was really happy with Jeremy over at Rocky Mountain sorting out a new head and various bits, truck is back and running great now!
Pat
93 RRC LWB 300tdi, R380, 6" lift, 35's, lockers ...etc etc

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