what happens if lifters are to tight on a sbc

Username	Post: Symptoms of hydraulic cam adjusted too tight? (Topic#49287)
Bearding User Info Ship Private Topic View Profile	11-07-03 12:xvi PM - Postal service#332448 Recently helped a buddy change cam/lifters in bbc.The engine seems to backlash more than before.He also states that the motor seems "apartment",like something is holding it back.I think the valves may be adjusted likewise tight.I did some searches virtually valve adjustment on this site.After warming up the engine, what is the all-time way to go along?There aren't whatsoever vacuume leaks,timing is where it should be.What other symptoms would there be if the valves are adjusted besides tight? Thank you Email Report

Robert_May Former as Dirt Member Posts: 6939 Loc: San Marcos, CA Usa Reg: 01-03-02 User Info Send Private Topic View Profile	Re: Symptoms of hydraulic cam adjusted too tight? xi-07-03 01:06 PM - Post#332449 In response to The upshot is just similar solid lifters beingness adjusted likewise tight - loss of pinch equally the compression pushes air back into the intake passages or out the exhaust. The intake is readily visible on a vacuum gauge while exhaust leakage is a bit less. Unlike solids, the hydraulic lifters are quite flexible with where they are sitting as long every bit they are in the adjustment range allowed. Robert May Fat? Consume less and you will get thinner! Electronic mail Report
SteveStreeter Needs to Get Out More Member Posts: 8394 Loc: Kettle Falls, WA. Us Reg: 01-nineteen-01 User Info Ship Individual Topic View Profile	Re: Symptoms of hydraulic cam adjusted too tight? 11-07-03 05:30 PM - Mail service#332450 In response to Was this cam and lifters install for a performance upgrade? Steve Electronic mail Written report
SuperSport Super Senior Member Posts: 6501 Reg: 07-03-01 User Info Ship Individual Topic View Profile	Re: Symptoms of hydraulic cam adapted too tight? xi-07-03 06:49 PM - Post#332451 In response to Running 'apartment' or labored, slower to rev, lacking power, running warm to hot, and in some cases pinging/detonation, backfiring/popping or missing.~SS~ E-mail Report
mr wabbit Super Senior Member Posts: 3535 Loc: IL Reg: 02-26-02 User Info Transport Individual Topic View Profile	Re: Symptoms of hydraulic cam adjusted too tight? eleven-08-03 06:36 AM - Post#332452 In response to SuperSport this is why hydraulic lifter rockers are correctly adjusted only when you adjust the rockers so that they are zip lash with lifters all way down in travel of their bores, and so plus one full turn tighter of the nuts both lifters for a cylidner are all style down in their bores when the piston is up at TDC firing position(rotor pointing at that wire tower on cap) this sets the plunger inside of the lifter assembly in virtually or exactly at center of its travle within of the lifter housing adjusting hydralic lifters plungers with engien running is non very authentic at all, will get y'all within range even so but wont guarantee that it wont demand washed once more during life of engine. Randy Lincoln Il 1982 Trans Am WS7 305 TH350 seven.5" for at present http://smg.photobucket.com/albums/v298/fast68/ra nd... Email Study
TheBandit Senior Member Posts: 832 Loc: Oxnard CA Reg: 03-23-03 User Info Transport Private Topic View Contour	Re: Symptoms of hydraulic cam adjusted too tight? 11-08-03 07:52 AM - Post#332453 In response to mr wabbit I'thousand non sure about Fast68'southward adjustment method. I've ever adjusted mine the conventional way, as follows. With the valve embrace removed and the engine warm and running, loosen the rocker until information technology starts to tap (this volition be very noticeable, so no need for a stethoscope or fancy equipment). Now slowly tighten until the borer merely goes away. This is the point of zero lash. Now tighten an boosted 1/iv to i/2 plow (xc-180 degrees rotation). Seems like Fast68's method would take the valves adapted too tight, only I may not exist understanding exactly the method he'due south describing. The Bandit - 1970 Nova SB355, 9.seven:ane, XE274, Perf RPM Heads & Int, Demon 650DP, HEI, 1 5/eight, TH400, 10" BTE 12bolt iii.73posi , Slide-A-Links, multileaf, 275/60R15 GT Qualifiers on 15x8.5 Convo Pros Email Report
SuperSport Super Senior Member Posts: 6501 Reg: 07-03-01 User Info Transport Private Topic View Profile	Re: Symptoms of hydraulic cam adjusted besides tight? eleven-08-03 01:23 PM - Post#332454 In response to TheBandit What TheBandit has described, should ever be the final step in hydraulic valve adjustment. Hot and running. ~SS~ Electronic mail Written report
Black99CobraMofo Senior Member Posts: 249 Loc: Spencer, MA Reg: 06-01-03 User Info Ship Private Topic View Profile	Re: Symptoms of hydraulic cam adjusted too tight? 11-08-03 02:29 PM - Postal service#332455 In response to TheBandit Quote: I'm not sure about Fast68'due south adjustment method. I've e'er adapted mine the conventional way, as follows. With the valve cover removed and the engine warm and running, loosen the rocker until it starts to tap (this will be very noticeable, and then no need for a stethoscope or fancy equipment). Now slowly tighten until the tapping but goes away. This is the point of zero lash. At present tighten an additional 1/4 to 1/2 turn (ninety-180 degrees rotation). Seems like Fast68's method would take the valves adjusted too tight, but I may not be understanding exactly the method he's describing. i have done that exact method before.. they definatly were manner to tight. i'm purchsing new valve covers this coming week so i can divide my old ones and so i can adjust them properly.. the way i adjusted them, this time was with the engine warm and off, i tightened till i felt reistance while turning the pushrods and turned the nut an aditional 10th of a turn.. they still tick... i'chiliad going to make my valve covers, and adjust them with the engine idling this coming week. ~J 1999 Cobra Coupe #1424; 1981 GMC C1500; 1986 Dodge Conquest; 04 GSXR 600 E-mail Report