Re: Warped Head on an old Gravely L - what is the likelihood?
I removed the head this afternoon. Next, I placed the head on a known flat surface and did a few swirls on some 240 grit sandpaper. It became very evident that the surface was NOT flat... I cannot definitively state that the head was warped but I can firmly say that the surface needed some help! After continuing with the 240 grit, I saw that this did not have enough 'meat' to get the job done so I switched to 150 grit. This grit also proved insufficient to get the job at hand done so out came the 60 grit. It still took be a solid 30 minutes to get the underside of the head flat. Once the perimeter was flat I went back to the 150 grit and finally finished up with the 240 grit. I cleaned the head's freshly revealed and uniform surface with kerosene and a toothbrush. This was followed with brake cleaner to endure all the old grit was removed.
Reassembly was started with applying K&W Copper Coat Gasket Compound to both sides of the head gasket. The head was positioned and the bolts were torqued to 19 ft/lbs (just like Gerrard as well as many others, I shoot for the middle!). I cleaned my hands and went and walked the property lines on an adjoining property that we are going to purchase. Tomorrow, I will fire up the 1957 Gravely and see if the problem is corrected. I will report my findings then.
1957 Gravely L
1974 Gravely C8