Clunk!

[Don Nelson]

I recently took my '90 out of winter storage (garaged), had the oil and filter changed (Mobil One), and fluids checked. I do this every year. It has 45k on it and ran a little hot last year, so had the hoses checked and raditor flushed out. That helped a lot and for the next couple days it ran cool and well. The other day it started running rough and after a mile or two, I noticed that the pass. side exhaust was white at idle, and "service engine soon" light came on. I pulled into a parking lot and shut it down. After letting it cool off, I turned it over and it did not start. Before calling the tow truck, I tried it one more time and...CLUNK! It appeared to seize up! The dealer got it started and he reported that it smoked a lot and speculated that it may be a head gasket, cracked head, or a warped head. He was afraid to work on it, so it is now in my garage. I have never had any problems with this car. It has never smoked (or used any tobacco products), nor has been particularly "clacky". I am not a mechanic, but I would think that if it is something this severe, it would have been indicated beforehand. Oil pressure has always been good, and except for the high temp (never exceeded normal operating temp), it has never shown any signs of distress. I have checked the oil and antifreeze and there does not appear to be any cross-over of fluids. My question: What should I check before taking this thing apart?

Drain the coolant and oil. Look for cross contamenation. Pull spark plugs and crank motor over as well. See if you get any fluid coming out (make usre you cover everything).

If anything out of the above three options the service guy gave you, it will be a head gasket failure.

Give me a call if you need any help. BTW what part of Anchorage do you live? I used to live off New Seward and 36th.

[Don Nelson]

Okay. I will give that a try.

I live on Lake Otis, down by Merrill Field.

BTW...My girlfriend and I are headed to Seattle (for the weekend) in June. Looking forward to some golf...any suggestions?

When in June are you coming?

[Don Nelson]

I think around the 1st. It's an award she received from her employer, so I don't have much to do with the arrangements...just along for the ride!

Plenty of things to do. June is a pretty good time to be here. A few hot streaks, but for the most part the days are comfortable.

[Z Factor]

Hello Don, glad to see you posting

I would take Jeff's advice, and don't run it until you check the fluids, plugs etc. You don't want a hydro-lock.

Keep us posted on your progress and feel free to ask for more help.

As to visiting Seattle in June,,,hmmm June + Seattle = RAIN
Actually ,,,, any month + Seattle = RAIN

When you have a moment zip over to this thread and cast a vote for Alaska.

http://zr1netregistry.com/forum/showthread.php?t=1009

[flyin ryan]

i would do a leakdown test if you don't find something obvious. have never done one on an LT-5 but it has to be as easy as it gets. pull the plugs & bring the hole your working on to TDC. i'm not sure if the damper is marked in 90° incriments or not? if not slide something down the spark plug hole & by turning the engine over by hand you'll be able to get real close. then have at err'. can walk you through it in more detail if you need, no problem.

[Don Nelson]

Okay...the plot thickens...

I pulled one sparkplug to test the compression, but when I turned the engine over it locked again...so, I pulled all the spark-plugs and turned it over again. This time the second cylinder on the 2nd (passenger side) bank spewed fuel all over the place! After cleaning that mess up, I tried it again with a clean rag over the spark-plug hole and checked the rag (after it blew against the wall). It's pure fuel, but a lot of it. BTW: There does not appear to be any cross contamination between antifreeze and oil.

So...is this a fuel injector problem...fuel rail...throttle-body?

Sounds like you may have an injector stuck wide open. Which can cause hydro-lock and be very bad. Look at replacing all the injectors.