22r diag questions
#1
22r diag questions
working on an 84 type 22r that was rebuilt around 10K miles ago. smokes like a beech (blue, oil) consumes a LOT of oil.
Specs:
stock rebuilt 84 style 22r. intake manifold from an 87 (its in an 87 truck)
webber carb and small air filter.
pace setter header (87 stock manifold would not fit)
LC Engineering EGR blockoff plates. (including the one at rear of head)
Air tube system blocked off at header.
Compression: 1: 170psi 2: 170psi 3: 175psi 4: 175psi
leakdown: 1: 15% 2: 10% 3: 10% 4: 25%
spark plugs: #1 ideal condition. 2-4 oil fouled
to me this seems like it would be valve stem seals, gaskets the builder used look to be a cheap chinese ebay kit. oil pan, front cover, etc all leak.
i want to repair this once and be done with it. so im looking for solid answers. if valve stem seals and re-sealing the engine wont fix the issues, the owner is ready to scrap her
Specs:
stock rebuilt 84 style 22r. intake manifold from an 87 (its in an 87 truck)
webber carb and small air filter.
pace setter header (87 stock manifold would not fit)
LC Engineering EGR blockoff plates. (including the one at rear of head)
Air tube system blocked off at header.
Compression: 1: 170psi 2: 170psi 3: 175psi 4: 175psi
leakdown: 1: 15% 2: 10% 3: 10% 4: 25%
spark plugs: #1 ideal condition. 2-4 oil fouled
to me this seems like it would be valve stem seals, gaskets the builder used look to be a cheap chinese ebay kit. oil pan, front cover, etc all leak.
i want to repair this once and be done with it. so im looking for solid answers. if valve stem seals and re-sealing the engine wont fix the issues, the owner is ready to scrap her
#2
My reply wont be a "solid answer" as I don't rebuild engines, but it looks like your going in the right direction with the valve stem seals leaking as you have all high psi numbers in the combustion chamber. The rings and the valves themselves are sealing properly, hence the high psi numbers, so what would be left is oil entering the combustion chamber via valve stems.
#4
Doh, well I saw the psi numbers but not the percentage numbers when I posted my earlier reply.
With 25% on number four, I'll need to determine, if you haven't already, where the air is escaping.
With 25% on number four, I'll need to determine, if you haven't already, where the air is escaping.
#5
pulled the head off today. some mild scoring on a few cam lobes. evidence of rust on some under valve cover surfaces.. pistons are SLOPPY on the bores.. i was able to easily slip in an .020 feeler gauge without forcing it or bending it.. lots of piston rocking moving it with my finger.. i would venture to say this is far too much.. cylinder walls still have a crosshatch finish.. did not even make 10K miles.. calling this one engine builder fail.. owner said if its more than fixing the head its scrap
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sandyota
84-85 Trucks & 4Runners
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Feb 4, 2021 11:16 AM



