Head gasket water seepage (L28).

[Vic Dyno Hire]

Hi guys,

 

I've just noticed a head gasket weep between cyl 4 and 5 plugs.    It does have some old staining from when the car was last run 8 years ago.  It this a common thing?  Maybe a head corrosion problem?  And can someone recommend a good gasket for a hot engine?  Its making petty good grunt now,  so want to keep it sealing.

 

Thanks again,

Simon

[dat2kman]

When you pull the head,  have a look at/for corrosion at water ports, sitting for 8 years will have had a bit of galvanic reaction going on,

get it skimmed to a surface finish f RA40.

 

Pro-Torque head gaskets are pretty good.

If you run higher comp, I have a new 91 mm Nismo MLS 1mm thick gasket i can sell.

[Vic Dyno Hire]

Thanks heaps for that.  I'll remove the head and measure the gasket thickness.  I didn't build the engine and are not sure of valve to piston clearance or comp.  I've been happy with the MLS on the A12, but 1mm might be a bit thin once I get the head skimmed on this one.

 

I'll measure it and get back in touch.  Might be a couple of weeks before I get to it.

 

Ta heaps

[dat2kman]

Before surfacing, the water passage holes may need a touch of weld around them.

If leaving blck in car, fill up bores with lots of cloth, and carefully run a big flat lapstone over it, high spots will be around the headbolt holes, the smoother and flatter you can get it the better.