Aloha.
I replaced the heads from my 1984 engine with a rebuilt pair from a mid 90's 6.5
I get gobs of white smoke from the left exhaust until I have been driving for a while. With the colder weather its getting to be close to 10 minutes. If I just start the engine and let it idle it will smoke for 30 minutes.
I have dual exhaust without a cross over so definately coming from the left side.
I checked compression using a gauge and an adapter that goes in through the glow plug hole, reading 400-425 in all 8 cylinders.
All 8 glow plus leads are getting power. The plugs are reading .9 to 1.1 ohms resistance.
I swapped sides when putting the glow plugs back in. Still smokes on the left.
It seems that the plugs screw all the way into the head until the hex head of the plug is against the head. So for the hell of it, I put them back into the old 6.2 head. There is a measurable gap beteem the head and the bottom of the hex. The glow plugs are screwing into the 6.5 head further then the 6.2.
If I clean off the glow plugs, install them, start the engine, drive around for a while. Let things cool, remove glowplugs, I have a definate soot build up on the plug threads. I think that the plugs are not fully seating on the left head and I am not getting full compression, thus white smoke until the engine getts really warm.
So is there a seat depth measurment? I think I can use the stem on a dial caliper to take actual measurements when I get home tonight.
I thought glow plugs between 6.5s and 6.2s were interchangable. Do I need to go get new plugs, or just chuck these up in a lathe and remove a little metal from below the hex head?
Thoughts?
Thanks\Pete
(edited 10-20 Subject Line changed, pete)
[ 10-20-2003, 05:46 AM: Message edited by: aloharovers ]