Hello and good day,
I purchased one a grunter extreme a couple years ago. I've been loving it! Regretfully I had some engine problems so I had the 1hdt rebuilt. At the same time I also sent away the pump and injectors for good measure. Now that the engine has been reassembled and worn in, the pump was turned up from a very conservative setting during the wear in process of the engine. While the engine was wearing in I noted the turbo wasn't making the same boost levels it had been prior to the rebuild. I dismissed it as being low exhaust energy due to the conservative pump setting. But since the pump was turned up the boost pressure didn't increase at all. It only comes up to approximate 15psi. I understand the Westgate is set for 18psi. There is also a bleed type boost controller - pre rebuild I had the turbo set to 25psi. To the day I pulled the engine out I was getting 25psi. During the rebuild process the turbo and manifold were removed as a single assembly. For good measure I removed the elbow off the turbo to see what I could of the turbine. It looked fine. Granted there is a lot of it I could not see. The bearing felt good and the turbo spins freely. Put the elbow back on and set the manifold / turbo combination away in a safe spot during the rebuild.
I am at a complete loss why the boost pressures are so low. The turbo seems to behave as it always did. Slight lag off the line, then builds boost like a freight train up to 15psi then holds there. My EGT's pre rebuild at a high were 1250 but never sustained. post rebuild under a hard pull 1150 now that the pump has been turned up.
Things I've checked and done:
- check all air passages for blockages no faults.
- disconnected Westgate line to see what max is. Boost builds rapidly up to 22psi and holds there.
- tried other boost gauges, all show similar readings.
- tried turning up the fuel for more exhaust energy. no boost change but dangerous temperatures.
I'm beginning to think the turbo is the problem. Are there any other things I can do to diagnose this issue? Being in Canada most diesel shops are of zero help - they just don't want to touch it.
The engine is fitted with a Safari front mount intercooler. The pump was rebuilt to factory settings with the exception of a stiffer spring for the arnoid pin. (To accomidate the 25psi boost. Good and full deflection of the arnoid pin is noted by scratches from the follower pin.) The arnoid pin has been reground to have a steeper slope, and no fuel cut. The valves were gaped properly about a year ago. The head was left assembled during the rebuild. Only the shortblock was rebuilt. This is a 92' engine - small pocket in the pistons. The shop who rebuilt the pump knew that a specific injector copper washer was required for these pistons as well as subtle differences in the pump. Truck has a 3" exhaust all the way back. Otherwise the engine is stock.
Not sure if I've missed any pertinent details if so let me know.
I thank you in advance for any help and advice you could give.
Should this unfortunately end up being a cooked turbo should I just get another grunter extreme? or is there a more modern turbo I could put in. I understand an adapter block would be necessary.
Thanks for your time
I purchased one a grunter extreme a couple years ago. I've been loving it! Regretfully I had some engine problems so I had the 1hdt rebuilt. At the same time I also sent away the pump and injectors for good measure. Now that the engine has been reassembled and worn in, the pump was turned up from a very conservative setting during the wear in process of the engine. While the engine was wearing in I noted the turbo wasn't making the same boost levels it had been prior to the rebuild. I dismissed it as being low exhaust energy due to the conservative pump setting. But since the pump was turned up the boost pressure didn't increase at all. It only comes up to approximate 15psi. I understand the Westgate is set for 18psi. There is also a bleed type boost controller - pre rebuild I had the turbo set to 25psi. To the day I pulled the engine out I was getting 25psi. During the rebuild process the turbo and manifold were removed as a single assembly. For good measure I removed the elbow off the turbo to see what I could of the turbine. It looked fine. Granted there is a lot of it I could not see. The bearing felt good and the turbo spins freely. Put the elbow back on and set the manifold / turbo combination away in a safe spot during the rebuild.
I am at a complete loss why the boost pressures are so low. The turbo seems to behave as it always did. Slight lag off the line, then builds boost like a freight train up to 15psi then holds there. My EGT's pre rebuild at a high were 1250 but never sustained. post rebuild under a hard pull 1150 now that the pump has been turned up.
Things I've checked and done:
- check all air passages for blockages no faults.
- disconnected Westgate line to see what max is. Boost builds rapidly up to 22psi and holds there.
- tried other boost gauges, all show similar readings.
- tried turning up the fuel for more exhaust energy. no boost change but dangerous temperatures.
I'm beginning to think the turbo is the problem. Are there any other things I can do to diagnose this issue? Being in Canada most diesel shops are of zero help - they just don't want to touch it.
The engine is fitted with a Safari front mount intercooler. The pump was rebuilt to factory settings with the exception of a stiffer spring for the arnoid pin. (To accomidate the 25psi boost. Good and full deflection of the arnoid pin is noted by scratches from the follower pin.) The arnoid pin has been reground to have a steeper slope, and no fuel cut. The valves were gaped properly about a year ago. The head was left assembled during the rebuild. Only the shortblock was rebuilt. This is a 92' engine - small pocket in the pistons. The shop who rebuilt the pump knew that a specific injector copper washer was required for these pistons as well as subtle differences in the pump. Truck has a 3" exhaust all the way back. Otherwise the engine is stock.
Not sure if I've missed any pertinent details if so let me know.
I thank you in advance for any help and advice you could give.
Should this unfortunately end up being a cooked turbo should I just get another grunter extreme? or is there a more modern turbo I could put in. I understand an adapter block would be necessary.
Thanks for your time
