Piston - to - cylinder clearance dimension
Piston - to - cylinder clearance dimension
01-31-2015, 03:29 PM
#2
my 605 last time i checked was almost 1 mm apart 
normal nrs are .25mm as a max.
at www.124zone.com u can find MB repair manual, somewhere in there u have the nrs.
regards
FD,
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well my friend that is milion dólar question my 605 last time i checked was almost 1 mm apart
normal nrs are .25mm as a max.
at www.124zone.com u can find MB repair manual, somewhere in there u have the nrs.
regards
FD,
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02-01-2015, 05:25 AM
#4
(01-31-2015, 06:03 PM)[486] For piston/wall clearance, .0018"-.0023" per inch of bore diameter is a good safe range. Shoot for the looser end for higher power builds, so the pistons have room to expand as they get hot.
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I can help you out with all your manual transmission, clutch, flywheel, intake and exhaust manifold issues.
Don't feel like this is Mercedes spec am I right? Source on that?
(01-31-2015, 06:03 PM)[486] For piston/wall clearance, .0018"-.0023" per inch of bore diameter is a good safe range. Shoot for the looser end for higher power builds, so the pistons have room to expand as they get hot.
F-tune Performance
I can help you out with all your manual transmission, clutch, flywheel, intake and exhaust manifold issues.
02-01-2015, 07:53 PM
#5
(02-01-2015, 05:25 AM)F.R.A.S Don't feel like this is Mercedes spec am I right? Source on that?Oh right, forgot that that's more toward direct injected engines, they put a lot more heat into their pistons than IDIs. Probably okay to go a bit tighter on an IDI.
(01-31-2015, 06:03 PM)[486] For piston/wall clearance, .0018"-.0023" per inch of bore diameter is a good safe range. Shoot for the looser end for higher power builds, so the pistons have room to expand as they get hot.
Just a general specification found looking around at streetable high performance diesel engines (all direct injected though). The numbers I ran into on dedicated pulling engines were even looser still. Factory is something like .0003" per inch. I'm running something like .0014" per inch on a pretty hot TDI build, but that has oil channels in the piston crown.
(02-01-2015, 05:25 AM)F.R.A.S Don't feel like this is Mercedes spec am I right? Source on that?Oh right, forgot that that's more toward direct injected engines, they put a lot more heat into their pistons than IDIs. Probably okay to go a bit tighter on an IDI.
(01-31-2015, 06:03 PM)[486] For piston/wall clearance, .0018"-.0023" per inch of bore diameter is a good safe range. Shoot for the looser end for higher power builds, so the pistons have room to expand as they get hot.
Just a general specification found looking around at streetable high performance diesel engines (all direct injected though). The numbers I ran into on dedicated pulling engines were even looser still. Factory is something like .0003" per inch. I'm running something like .0014" per inch on a pretty hot TDI build, but that has oil channels in the piston crown.
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