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These are not at all bad to pull With the engine out you get get quite intimate with it and see very well too... Hope this goes well..

Thanks for talking me off the ledge, Jim! I wish I had known about injectors before tearing it apart. Next time (hoping there isn't one) I'll stop by...

Very well said.

Human psychology is such that we tend to assume the worst, especially with engines. Don't invest/plan on an expensive solution for what may not be a...

The oil sampling will tell a big story. If there is not any glycol in the oil (A very good thing) getting the heads off will tell the story. ...

Thanks for all the great help! I did replace the injectors about 40k ago and now wish I had checked them before tearing into it. I will get an oil...

If you get that "deep" into the engine, be sure not to neglect the timing chain and sprockets. If you do get that far into it, Jim's R&R books are...

Glycol coolant will ruin the bearings fairly quick. If there is coolant in the oil it has gone through the entire engine..... May be a great idea...

An oil analysis might tell you if you have a bearing issue or not. If you do, you must fix it or you're wasting your time doing the head gaskets. ...

I agree, likely a head gasket failure. Less likely could be a cracked block/cylinder. If you're only doing head gaskets, while they are easier to...

Thanks, Jim. I winced when I started losing cabin heat and much of my coolant blowing out the reservoir. A chem test confirmed the leak. I resigned...

My guess is that your engine has a head gasket leak. I'd pull the heads to evaluate, and only then make any plans to go further. Your engine may not...

What cost is too much if it works? I think these types of products are fine if they are effective at doing what they're labeled to do. Seafoam is...

Wondering why someone hasnt done a test on these treatments..Seafoam ain't cheap..

Whatever you have done is working at 400000 + miles My only Dmax has issues and smokes, i dose it with ATF once in a while, but i think the issues...

I add a can of Seafoam prior to a long trip. I have an 06 with 154K on her. Seems to help but then again a long trip helps after mostly city driving....

Yeah, like asking what's the best oil brand to use... They work, if you ask the people selling a service that does the service. It might work, if...

OK then....

Welcome aboard! Aside from the thread you posted in here, you can also sort through the other individual threads here:...

I use Bass Pro Synthetic 2 cycle oil for lubrication 10 oz for 25 gal diesel. I would use power service for jelling.

Looking at doing a duramax in a 2000 OBS k2500 frame. Wanting to do a ful LB7 drivetrain and dash. Any help?