sivrtnge2

Right. I'm kind of wondering if the turbo and Jake issues are related to oil pressure, what's the oil pressure?

The engine oil pressure is about 15 or so at idle and about 60 or so at about 1900 rpms. I might be a little off on the numbers but close.

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BILL

Were the engine brakes rebuilt at the same time that the engine was rebuilt? Make sure the Front brake assembly was installed on the front head and that the Rear brake assembly was installed on the rear head (there is an id tag on the housings that says which housing is which). Make sure the valve and brake adjustments were set correctly as well. I think your engine should have the alternate exhaust lash setting. Were you losing turbos before the rebuild or did that start after the engine was rebuilt?

Regarding the turbo failures:

Clean any oil that has accumulated in the inlet manifold and the charge air cooler.

Clean all turbocharger failure debris from the air cleaner and inlet air ducts.

Clean all debris from the exhaust manifold (and EGR cooler if applicable).

Inspect and clean the turbocharger oil supply line and oil drain tube.

Replace the turbocharger mounting flange gasket, oil drain tube gasket(s) or O-ring (as applicable) and the turbocharger mounting studs and nuts.

Change the engine oil and filters.

Pre-lube the replacement turbocharger.

Additionally you need to make sure the correct turbo is being installed and that it is the current revision level. The turbos make look the same but they are different.

Thanks for all the replies from everyone!!! The engine brakes were not rebuilt at the same time. I dont know if they were installed properly or not, that will need to be checked. I dont know if the stealth portion is working correctly or not either. I would love to find a reputable "old school" mack machanic to check this truck out for me. I am from the Atlanta metro area, the truck is located in Mobile, Al area but we can take it just about anywhere. If this is possible, please let me know.

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BILL

Hi, how is the oil pressure to turbo? low?

Grant

Thanks for the reply!!! How do I check the oil pressure at the turbo???

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BILL

Hello All once again I have a problem with the truck engine and Jakes or stealth or whatever. There is no stopping power with the jake setup on my truck. Its a 1997 Mack Ch613 with a E7 454. The vin on truck is 077766. I can hear the jakes come on but nothing changes when they are engaged. Also what can we do about the engine eating turbos. This is the forth turbo we're getting ready to put on. Two of them just snapped the shaft in half and one is eating the blades. Please help with these issues if possible. By the way the engine has been rebuilt with no change in the jakes or turbo use.

Hello all, new to this site. I was reading the other oil blowing threads and was wandering if this might be my problem as well. I have a 97 Mack with a e7 454 engine. I just had the engine overhauled (new pistons, sleeves, liners, bearings, heads, air compressor, etc) a month ago. All of a sudden, the engine started blowing oil out of the dipstick tube. Everyone was looking at the air compressor including Mack. They have installed 2 more air compressors within the last 30 days. I see that the guys here was talking about the 426 engine. Could the turbo be my problem as well. What else can I do to be sure of the problem. I have nearly 20,000.00 in this truck so far trying to get it right. Please advise!!!

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BILL