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The pulsing you see is from the liftpump- not being a gear driven pump but similar to an actuator ram going back & forth so this will cause pulsing. While it is good to see how bad the pulse is when diagnosing, it is really hard on mechanical gauges & sending units for electrical gauges. The...

N/A precups are squares from GEP. Turbo is diamond. You have to really be fighting for top power to find a difference in the two power wise. I had a set of squares machined out to be as big as diamonds that I never installed because I bought a set of p400 heads instead. If you are set on...

I’ve seen it but only once. Never determined why, just figured vibration & when originally crimped it must have had a minor dent to start the crack from. Better this end than the starter at least.

Gauge - typo

And not all of us hummer weirdos have money! Many of the hmmwv owners have that as their DD because its cheaper than regular diesel pickups.

Sure make a fellow miss the days of db2 and a manual transmission…

Nopers. Unless someone used rubber lines for your transmission cooler. They will tell you it doesn’t need to be hydraulic hose and they can make regular automotive hose usually. Tell them no thanks, that you want it zombie apocalypse proof for the next 40 years so the multi layer hydraulic...

Ok - at this point you loose pressure from the regular pressure test so just continue to pressurize it by hand with engine off. The coolant will go somewhere. Water cooled turbo means it could go into the cylinders where it is burning away or straight into the exhaust. So when you...

Haha- sorry post #10. And I searched the casting number -those aluminum parts I was wondering about is air inlet to the turbo for 2004 civilian hummers. The retail new for a couple hundred bucks each.

Winning! With nothing in oil, no exhaust going into coolant, this shouldn’t be anything internal. Regular oil cooled turbo or a water cooled turbo on it now? Water to air intercooler added? Examine carefully between radiator and rest of the cooling stack. Sometimes a pinhole leak in radiator...

If someone recognizes the casting numbers off a balanced flow waterpump- That could help folks. I never remember the numbers on it. The keen eye notices the cool banks style turbo manifolds that can adapt a side mount turbo into the pre turbo trucks and pre turbo hmmwv/hummers. Idk if Grayman...

Having to replace an optic sensor in a BRAND NEW ip or even one you buy that is a rebuild is completely wrong. Buy a long block engine and have to replace an oil pump or oil pan? No. If a new ip is faulty and has to get replaced by a shop- the distributor pays for a cut portion on labor...

CHECK OIL DIPSTICK!!! Since no exhaust gases in coolant and no visible leaks only other inside the engine possible is into crankcase. Oil turns to a milk like with water/coolant in it. Is so DO NOT START AGAIN.

Is this with that brand new ip? And no- long potentially danger trips are not advisable with a 251.

Don’t replace them just because it isn’t the most common- heck the common gmx turbos are not very good. The factory crossover is a p.o.s. So unless building custom headers to get to the turbo flange, I say run what is there. 3 psi cruising at steady speed on freeway can be...

The set of injector return lines from Leroy is fine. I bought a set from him. I used to get the line by the foot from a Mercedes Benz dealership for the om603. It just pushes on without any clamps, but it’s a bit more expensive. I think they last about the same amount of time.

Wait a minute- is that a vw mount he reused? 😜

There are aftermarket tachometers.

We don’t know the best boost numbers for your engine because we don’t have specs on that ATS aftermarket turbo- but it is a really small turbo, I would estimate same size or smaller than the gm3. When the gm3 was added to the 6.5, 10 psi all day long was a safe range. iirc above 12psi is when...

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