Must be having a good day. Found it. Its the mounting stud holding the filler. Leaking past the thread tapped right through. Well I guess some Loktite should fix it🙂
To measure drive pressure you need a metal line off the exhaust manifold getting far enough away to lose conducted heat. Then you need something in the line to damp out the pressure pulses. A small restriction can work.I am finding more and more references to drive pressure but not much info on how to measure it. As seen in the photos my custom manifold is made of stainless T,s with the turbo at the back of the engine. Then the exhaust from the turbo is a mandrel bent U then a 90 then straight 3 inch all the way back. No muffler.
Should I be concerned about drive pressure? If so how do I measure it?
Yes and that's what I've done in the past. I coiled the line to absorb vibration better.Thanks.
Would an oil pressure gauge with the thin copper tube from the manifold to gauge work?
Then I am not sure what I am looking for. Some posts I found have higher drive pressure than boost and some lower. What is normal and what might I see if my manifold / exhaust is restrictive?
Well I am 77 now and the truck is still going, however I read somewhere I should have re torqued the head. This I did not do. Should I do it now and if so what is the process?FOUND IT1111111
Pulled off the dump pipe to see if it smoked without it, looked down and there was the bloody exhaust brake shut.
I had looked at it previously, checked it with the engine going and it moved OK and did not seem to make much difference at a fast idle so ignored it. But here it is shut. I must have put the pipes on the wrong way around. They are both the same colour, black, so too easy. Swapped them around , no smoke and low EGT..
I will blame the onset of oldtimers disease. I was 74 a couple of months ago so that will do
So thats a lesson, a blocked or restricted exhaust can cause those symptoms.
I will take it for a burn up and down the drive next, see how it behaves before a road test.
turbo install.03 by https://www.flickr.com/photos/141809
How many km since your install? Is everything still behaving?Well I am 77 now and the truck is still going, however I read somewhere I should have re torqued the head. This I did not do. Should I do it now and if so what is the process?