I recently had to replace the head cover gasket on my 1980 B-7100 HST tractor. The part number for the gasket is 15381-14520. Problem is the gasket was too long by about an inch, so I had to trim it to make it fit. When a leak developed, I removed the gasket and reinstalled it with a gasket sealer. It had to be trimmed again, about 1/2" to make it fit. I'm guessing it may have stretched out some when I removed it? Could I have accidently stretched it in the initial install? Any advice much appreciated!
B-7100 head cover gasket
- Thread starter Damolo
- Start date
You do not use gasket sealer on a head gasket. You definitely did not have the correct HG to begin with
Lil Foot
Well-known member
Lifetime Member
Equipment
1979 B7100DT Gear, Nissan Hanix N150-2 Excavator
I think he meant the valve cover gasket.
If so, when I replaced my B7100 valve cover gasket, (years ago) it fit perfectly, and still fit & sealed when I checked valve adjustment a few years after. Still no leaks.
Sounds like maybe you got the wrong gasket.
Thanks, Lil Foot, for your reply. Yes, I meant the valve cover gasket. In my Japanese Parts List book that came with the tractor they call it a "head cover" gasket, something lost in translation I guess. I do feel like it is the wrong part, but it's the one called for for the B7100. I suppose it's possible the engine has been replaced--I've only had it for 20 years--but it looks exactly like the D750-AH engine in my parts book. Is there a serial number on the engine that I can reference to see exactly what I have?
Thanks.
Lil Foot
Well-known member
Lifetime Member
Equipment
1979 B7100DT Gear, Nissan Hanix N150-2 Excavator
If I remember right, there is a cast number on the block denoting 650, 750, 850, & 950 engine sizes...
but I don't remember where it is.
My tractor is 150 mi from here, so maybe someone else can chime on here.
Maybe NIW?
but I don't remember where it is.
My tractor is 150 mi from here, so maybe someone else can chime on here.
Maybe NIW?