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Old 01-01-2010, 08:29 AM   #14
bandit7862
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Re: 2004 Blazer 4.3 liter tapping when cold.......

Quote:
Originally Posted by oneav8or View Post
Thanks again Blazes. Unfortunatly you are right (as usual), and my intake manifold is leaking. Borrowed a pressure tester and found the small leak from the intake manifold. Thanks for the info, as I will be also changing this myself. Will report back when I'm finished.
oneav8or,

Where did you get the pressure tester from and how exactly do you hook it up? If this is the best way to check for a leaking intake manifold gasket, I want to try it before doing this huge job. Also, before I am able to attack this job, I have been changing my oil about once a month just to keep it running and it has been keeping my lifters fairly quiet temporarily. My lifters start ticking again when cold about 3 weeks to a month after the last oil change. Lastly, It was getting expensive to keep pouring dexcool into the radiator and reservoir, so I heard I could use the green anti-freeze instead of the orange dexcool. I was losing about a quart of coolant every week or two with no visible signs on the ground or around the engine. That is why I was asking if I could be losing this coolant out the exhaust manifold because I cannot find a leak. Maybe it is leaking out the exhaust while driving. Is this possible? I now have heard that you should never mix the 2 colors of anti-freeze. I am not sure which is correct. Any suggestions would be great to know.
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2004 Chevy Blazer 4.3 Liter 4X4
1999 Pontiac Grand Am 3.4 Liter
1978 Pontiac Trans Am 6.6 Smokey & the Bandit
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