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Total 16 documents matching your query.

1. [oletrucks] leak-down compression test (score: 1): Author: "Dana Muise" <dana@spazzco.com>; Date: Wed, 23 Jan 2002 11:12:24 -0800; Hey truckers I did a compression check on my old 235 last week and all 6 cylinders came in about 10 lbs below the minimum. The manual said to put a little oil into the cylinders and try it again. The; /html/oletrucks/2002-01/msg00453.html (8,309 bytes)
2. RE: [oletrucks] leak-down compression test (score: 1): Author: "Mike Baggese" <passnb4u@earthlink.net>; Date: Wed, 23 Jan 2002 11:39:9 -0800; Did you do the test with a warm engine and throttle wide open? You results may change. Yes, if the reading came up with the additon of a squirt of oil, then the oil is most likely aiding in ring seal; /html/oletrucks/2002-01/msg00454.html (9,493 bytes)
3. Re: [oletrucks] leak-down compression test (score: 1): Author: "A.B." <bigfred@unm.edu>; Date: Wed, 23 Jan 2002 13:04:33 -0700 (MST); On a leak down the PSI isnt' really all that important, you are really just looking for the percentage of leakage, ie, if you put in say 50 psi (w/piston at TDC so it doesn't turn the motor and the v; /html/oletrucks/2002-01/msg00455.html (9,096 bytes)
4. Re: [oletrucks] leak-down compression test (score: 1): Author: "Rob J." <a70ragtop@hotmail.com>; Date: Wed, 23 Jan 2002 12:13:19 -0800; Would it be possible to simply loosen the rocker arm assembly, removing the pressure on the valve springs? That would eliminate having to individually put all pistons at TDC in order to ensure the va; /html/oletrucks/2002-01/msg00457.html (10,235 bytes)
5. RE: [oletrucks] leak-down compression test (score: 1): Author: "Hanlon, Bill" <Bill.Hanlon@COMPAQ.com>; Date: Wed, 23 Jan 2002 14:37:50 -0600; Much easier to turn over the engine than un and the readjust the valves. Besides that the differences in volume from piston up to piston down would greatly change the percentage leak down rate. The r; /html/oletrucks/2002-01/msg00459.html (10,912 bytes)
6. Re: [oletrucks] leak-down compression test (score: 1): Author: "A.B." <bigfred@unm.edu>; Date: Wed, 23 Jan 2002 13:39:47 -0700 (MST); I can't see why that wouldn't work, other then the leak down not telling you if your valves are closing all the way. oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959; /html/oletrucks/2002-01/msg00460.html (11,142 bytes)
7. Re: [oletrucks] leak-down compression test (score: 1): Author: " Claude Ramey" <cramey@earthlink.net>; Date: Thu, 24 Jan 2002 05:28:33 +0800; -- oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959; /html/oletrucks/2002-01/msg00461.html (8,644 bytes)
8. Re: [oletrucks] leak-down compression test (score: 1): Author: "Rob J." <a70ragtop@hotmail.com>; Date: Wed, 23 Jan 2002 13:35:03 -0800; It makes sense that each piston should be at TDC...now, what is the best way to determine when the piston is there for each cylinder...in the past, all I've worried about is #1...how would you know w; /html/oletrucks/2002-01/msg00462.html (9,408 bytes)
9. Re: [oletrucks] leak-down compression test (score: 1): Author: "Allen Jones" <jonesal@u.washington.edu>; Date: Wed, 23 Jan 2002 13:42:55 -0800; I think you make a good point here and I'd to extend it a bit. Isn't the purpose of the leak down test to test compression lost at the point where you need compression the most, i.e. near TDC? I woul; /html/oletrucks/2002-01/msg00463.html (12,546 bytes)
10. Re: [oletrucks] leak-down compression test (score: 1): Author: "A.B." <bigfred@unm.edu>; Date: Wed, 23 Jan 2002 14:58:44 -0700 (MST); piston stop? oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959; /html/oletrucks/2002-01/msg00464.html (9,770 bytes)
11. Re: [oletrucks] leak-down compression test (score: 1): Author: "Claude Ramey" <cramey@earthlink.net>; Date: Wed, 23 Jan 2002 18:47:49 -0600; We used a degree wheel on the distributor. Once you get number one at TDC with the timing mark, all other cylinders follow, in firing order, depends on # of cylinders. The thing is, the cylinder woul; /html/oletrucks/2002-01/msg00466.html (11,040 bytes)
12. Re: [oletrucks] leak-down compression test (score: 1): Author: "Jay Baker" <jaybaker@ruralnetwork.net>; Date: Wed, 23 Jan 2002 18:50:15 -0700; You guys are missing the boat on the leak down test the Idea is to see if and were it's leaking BOTH valves have to be closed for this to occur IE at TDC if your piston is in any other position one v; /html/oletrucks/2002-01/msg00467.html (11,510 bytes)
13. Re: [oletrucks] leak-down compression test (score: 1): Author: Tinker <tinker@wanadoo.fr>; Date: Thu, 24 Jan 2002 18:50:58 +0100; I may have missed something, but why did you do the compression test in the first place. Does the motor run? If so, does it use oil? With consistently low figures on all cylinders, piston rings are t; /html/oletrucks/2002-01/msg00483.html (8,493 bytes)
14. Re: [oletrucks] leak-down compression test (score: 1): Author: Ribbit2@aol.com; Date: Thu, 24 Jan 2002 13:28:44 EST; Kinda what I was thinking too Matthew Tinker (love that name) ! ! ! 57-3100-SB oletrucks is devoted to Chevy and GM trucks built between 1941 and 1959; /html/oletrucks/2002-01/msg00484.html (7,908 bytes)
15. Re: [oletrucks] leak-down compression test (score: 1): Author: Thomas Allen <thallen@nwlink.com>; Date: Thu, 24 Jan 2002 17:52:31 -0800; A motor can run and not use too much oil and still have too much blow-by caused by leaking rings. Poor fuel economy and low power are the result. Keeping blow-by to a minimum can make a huge differen; /html/oletrucks/2002-01/msg00486.html (8,865 bytes)
16. Re: [oletrucks] leak-down compression test (score: 1): Author: "Matthew TINKER" <tinker@wanadoo.fr>; Date: Fri, 25 Jan 2002 13:04:03 +0200 (MET); My question is still valid, why did you do the compression test in the first The diagnosis of engine problems start with the problem and not the results of a test that are not very conclusive. I don; /html/oletrucks/2002-01/msg00490.html (8,027 bytes)

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