1216cc foot gasket
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Huib
Re: 1216cc foot gasket
Turned the dust bin upside down today. Messy but I found some scraps of the brown gasket or rather a brown gasket. Thickness 0,20 mm.
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william
Re: 1216cc foot gasket
It remains a mistery as the parts book gives the same partnumber for both enginetypes. My 1216Hf engine which never has been taken apart before had a 0.5mm (brown) gasket fitted but, due to the 818.140 head which has a larger combustionchamber, the pistons reached the very top. I think at the end of the day you won't feel the difference between 0.2 or 0.5mm foot gaskets if you use a nowadays standard headgasket (only 1300 gaskets are available as far as I know) with a thicknes of 1,5mm or more you will loose compression anyway. Originals were 1.2 or 1.3mm thick.
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Huib
Re: 1216cc foot gasket
I will do a dummy build with the 0,2 foot gasket and then decide whether it stays or will be changed.
A 0,2 mm or a 0,5 mm gasket is the difference between a CR of 9,0 and 8,7. If the headgasket is 1,5mm instead of 1,2 mm the CR goes to 8,4.
I should have 1.2 mm headgaskets though. We shall see.
A 0,2 mm or a 0,5 mm gasket is the difference between a CR of 9,0 and 8,7. If the headgasket is 1,5mm instead of 1,2 mm the CR goes to 8,4.
I should have 1.2 mm headgaskets though. We shall see.
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william
Re: 1216cc foot gasket
I assume you fabricate the 0.2mm footgasket yourself?
You are right about the CR changing when you alter tickness of foot of head gaskets. For best CR you loose the footgasket and use a 1.2mm headgasket.
You are right about the CR changing when you alter tickness of foot of head gaskets. For best CR you loose the footgasket and use a 1.2mm headgasket.
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Huib
Re: 1216cc foot gasket
Yes, William. I will make it myself. It will be some months though.
All engine parts will go through a very special cleaning line including ultrasonic cleaning.
Then grinding crankshaft, line bore restoration, boring, honing, valve guides etc etc.
I still have to do a measuring session on the auxiliary shafts and the rockers etc.
Then weighing pistons, conrods and balancing crankshaft, flywheel etc.
It is not going to be a competition engine but a high mileage, reliable, fast and eager road engine. So, I will settle for old fashioned gaskets. It means making some as in todays gasket sets the thicknesses do not alway appear to be correct.
All engine parts will go through a very special cleaning line including ultrasonic cleaning.
Then grinding crankshaft, line bore restoration, boring, honing, valve guides etc etc.
I still have to do a measuring session on the auxiliary shafts and the rockers etc.
Then weighing pistons, conrods and balancing crankshaft, flywheel etc.
It is not going to be a competition engine but a high mileage, reliable, fast and eager road engine. So, I will settle for old fashioned gaskets. It means making some as in todays gasket sets the thicknesses do not alway appear to be correct.
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william
Re: 1216cc foot gasket
Like for example gaskets for oil and waterpump covers. they should be as thin as possible to warrent good pressure especially for the oilpump. But in aftermarket gasketsets it seems that they use just one gauge carton and stamp all gaskets out of it. Thus, way to thick for some...
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Huib
Re: 1216cc foot gasket
Right. I build my oil pumps without any gasket under the cover but machine the rotors to a height which is 0,03 mm less than the inside height of the housing.