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Location:
Penrith
Registered:
January 2004
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need help doing a compression test on my new girl
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Wed, 18 February 2004 04:14
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Hey guys and girls.
I've just gotten my hands on my celica and am doing compression test but the book i have is american and doesn't have the 21r-c in it.
just the 18r, 20r and 22r
does any one know what the upper and lower PSI is for the 21r-c engine.
I'm guessing that the 20r info would be pretty close if not the same as the 21r, if not please feel free to correct me.
thanks in advance
Phil
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: need help doing a compression test on my new girl
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Wed, 18 February 2004 06:29
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Upper is never really a worry, but I've always gone by anything below 140ish may need work.
Make sure there is max of 10psi difference from highest to lowest
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Location:
Penrith
Registered:
January 2004
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Re: need help doing a compression test on my new girl
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Wed, 18 February 2004 09:02
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I did the test...
all 4 cyl 160
the car is blowing a shitload of smoke when it gets hot, and the original thought was rings.
but after the compression test and the fact that the smoke doesn't smell like oil smoke i'm not sure
after getting the engine warm i pulled the plugs out and smoke was gushing out of number 3.
I'm thinking carbon residue maybe..
why i need to know now is if it is how to clean it.
as always any help or advice would be greatly appreciated
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: need help doing a compression test on my new girl
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Wed, 18 February 2004 13:44
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You did do the compression test correctly?
ie, get the car warm, remove ALL plugs, insert comp gauge, turn over for a good few secs?
Just making sure
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Location:
Penrith
Registered:
January 2004
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Re: need help doing a compression test on my new girl
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Wed, 18 February 2004 22:23
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Absolutely.
followed the procedure in the manual to the letter.
compression built up quickly and consistently for all 4 cyl.
I'm really thinking that the rings are fine...
I'm going to put a full set of new plugs, leads and fuel filter to see if maybe the fuel isn't burning properly.
whats the tool called to measure how much umph each lead is putting out??
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: need help doing a compression test on my new girl
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Thu, 19 February 2004 00:17
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General way of testing leads is to Use a multimeter on them.
I think if the resistance is more than about 11k Ohms, replace.
But check your manual, it should tell you.
But I doubt thats causing the smoke problem.
What colour/smell is it?
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Location:
Canberra
Registered:
December 2002
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Re: need help doing a compression test on my new girl
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Thu, 19 February 2004 01:07
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um is it smoke or steam? 
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Location:
Penrith
Registered:
January 2004
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Re: need help doing a compression test on my new girl
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Thu, 19 February 2004 02:10
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Its definetly not steam.
Its bluish and smells rich as hell. put a cloth other the tail pipe and gets heaps of crap.
thats what got me thinking that maybe it was something to do the leads or plugs...
can anyone think of what might be causing the smoke to come out of the cylinder like it did when i took the plug out of it?
especialy when the other 3 had none
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I supported Toymods
Location:
Australia
Registered:
November 2003
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Re: need help doing a compression test on my new girl
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Thu, 19 February 2004 02:19
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Stuck valve maybe? I dunno, its not my strong point.
Well, unburnt fuel will be black.
Greyish/Bluish colour is oil smoke.
It could be oil rings gone, and compression rings were fine, as was my 6m.
When she was cold, she blew some smoke, but once she was hot she was fine.
Compression was around the 170 mark across the board, and the head was just rebuilt.
We just put it down to oil rings.
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Location:
Canberra
Registered:
December 2002
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Re: need help doing a compression test on my new girl
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Thu, 19 February 2004 02:25
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ok 2 things pop to mind.
1. excessive amounts of oil is being sucked past the valve guide seals
2. your oil scraper rings are stuffed.
how much blowby are you getting in the crank case too much can force oil into the inlet manifold and burn it off
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