If you are able to still get the 60psi then it might be a head gasket. Does it change at all from cold to warm? Take a flashlight and look to see if there is a coolant trail anywhere from under the head.

 

While your at it grab an oil sample and send it out for analysis. That will get rid of all the guessing going on.

 

Just found the problem!

The flappers broke off the wastegate... so it was open all the time, making it feel very slow while cuising and almost impossible to spool.
No idea why that would happen!

Thanks for the help everyone!

 

Are you still loosing coolant are was it just a purge issue from the dual pump install?

 

yeah loosing a little coolant, it seems to push it out of the radiator cap, and the reservior overflow. I dont know maybe the water is boiling...?

Im a little concerned, id hate to pull the head again!

 

Get a good by-pass system like Opie's it will elimate the boiling of the coolant

 

Add some Redline Water Wetter, it noticeably helps. Some may say thats a bandaid fix but hey, wouldn't you spend 20 bucks on an additive first before $$$ on a bypass?

 

thanks bigblue! i should try that.

On the other hand where do i find the opies bypass, and what exactly does it do?

 

What head gasket did you use, when you o-ringed the head?

Paul

 

First I used a 2nd gen 24valve HG.
It didnt work quite right! motor got very hot, i think it got compression into the waterpassages! so i pulled the head again, and used a MLS (3rd gen Stock HG)

 

Heres where to get the by-pass kit mentioned earlier.I don't think he has updated the link to show the kit.
http://www.opieparts.com/

This thread has some pics of it.
https://www.dieseltruckresource.com/...d.php?t=220004

 

How did you get the o-ring to seal with the MLS gasket? The cylinder hole in the MLS gasket isn't round, that's my reason for asking. The o-ring would cut across the cylinder hole.

Paul

 

We had that happened to a customers truck also.It is running a HTT top charger swapped out the exhaust housing for a new one and all is well now.

 

Did HTT replace it for warranty?
What W/G actuator where you running on that charger?

i wonder why would they break?
This is an HTT also

 

I know i was a bit concerned about that too. Since the 2nd gen gasket didnt work, i didnt feel like putting it together the same way again!

Im not sure if an oring did cut across a clinder hole. it looked like it would just sit on the very edge... some told me to use a MLS gasket, so ive been trying both. i still dont know why the 2nd gen gasket didnt work