 Cylinder Head Temp Gauge, 20 min. Cam Break-In |
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| d7n7master |
 Apr 28 2004, 09:32 PM
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Gary#  Group: Members Posts: 663 Joined: 13-March 03 From: The O.C, Ca. Member No.: 421  |
Hi All,
Assuming the rebuilt engine starts & RUNS for the 20 min. required to break-in the cam & lifters... (IMG:style_emoticons/default/smilie_pokal.gif) what cyl. head temp should I expect to see??? I'll be watching for oil pressure/temp/leaks/UhhhOhhhzzz And if it leaks or murphy shows up and I have to shut it off before the "magic" 20 min. mark: does that mean that the cam & lifters are now toast??? Are there any secrets as to "what" oil I use for first crank? I've always been a Castrol 20w50 kinda guy. So. Cal. driving. A friend recently suggested adding a quart of Marvel Mystery Oil into break-in oil. Stopped me cold. Hadn't heard of that in many years. My dad put that stuff in everything!!! Engines, gas tanks, lawn mowers, parts cleaner... but I always thought it was snake oil. (IMG:style_emoticons/default/unsure.gif) Thanks, Gary |
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| dmenche914 |
Apr 29 2004, 12:04 PM
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Senior Member Group: Members Posts: 1,212 Joined: 27-February 03 From: California Member No.: 366 |
Break in of cam/lifters is usually done at fairly high rpm, like 2-or 3 K. I have been told to never let the motor idle during the brake in, else cam can go flat right away.
Use the starter, with plugs out to get the oil pressure up, before starting. Some builders remove the rockers during this oil pressure building run, to avoid any wear on the cam until they are ready to let it break in at the higher rpm. Do a search on google for engine break in, specify VW, there is a ton of info on VW (aircooled) break in's that is applicable. I see no benifit to an electric motor driving the engine. And you will need a big motor to get rpms up anywhere near what you need. I once drove a Buick V6 with a 2 HP motor for some funky balance tests. This done with plugs out, I had to have a big gear reduction to just get it to turn over, and the max rpm I had was pretty low, not even Idle speed was achieved. The motor has a lot of friction to overcome. It is helpful to have a second person as a watch, to look under car for any oil leaks during break in, so you can immediatly shut down if problems. good luck dave |
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Posts in this topic
d7n7master Cylinder Head Temp Gauge Apr 28 2004, 09:32 PM
SpecialK There are some serious 'Old School Motorheads... Apr 28 2004, 11:56 PM McMark What about hooking a big ass electric motor to the... Apr 29 2004, 02:24 AM Gint QUOTE
Mark Henry I don't have time to do the pull the rockers b... Apr 29 2004, 02:22 PM |
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