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Originally Posted by Brian Carlton
Not for the turbo engine. They were a bit over $100. each, but, now, with the exchange rate, they are above $150.  |
This cost is conservative....
After many, many diesel rebuilds I would do the following :
Install new liners and ask the machine shop to clearance the cylinders to each numbered piston.
Piston wear will vary slightly and 0.0005" larger clearance than factory is safer, if in doubt.
My machine shop bores STD liners to 0.0007" piston wall clearance for new pistons.....
On a turbo, I increase this to 0.001".
The turbo pistons are tough and as long as the engine has not been subject to thermal overload, used pistons in new liners will work.
You can increase your engine compression pressure and reduce blow by if you use Total Seal Rings. If you buy a STD ring set, Total Seal will machine your second groove rings for you.
I have over 30 engines running on Total Seal rings and some are well over 100,000 miles now.
The Total Seal difference is this..1993....customer had a Nissan diesel car....engine old and hard to start....I installed Total Seal rings and set of gaskets....customer moved to Columbus Ohio....first winter there he calls me....he's so proud he's the only diesel on his street running after a night of 20 inches of snow.....without plugging in block heater.
And no, I have no affiliation or re numeration from Total Seal.
They tell me another company makes something similar with an 'overlapping ends' type second ring.
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I have tested compression pressures on these rings and most pump over 500 psi at sea level ( Injectors and glow plugs not installed. )
The only problem is, you need to be
very clean and careful when installing these rings...you will need the 'ratchet' type ring compressor to close these up prior to install....whatever anyone tells you, do
not install piston/ring assembly dry. Use Rotella 15W40 and run 100 to 150 miles non-stop to break them in. Do not let the engine idle for over 5 minutes before driving it.
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