Ron1200 Posted October 27, 2011 Report Share Posted October 27, 2011 On the way to work today, I get a loud noise from under the hood. Kinda sounds like an endless string of marbles in a tin can. It happens as I hit 2000 RPM and higher. It will stop when the RPMs drop to 1500. It mostly does it when I start from a stop. It happened much more on the way home. Is it hard to change the tensioner? Geez, I've had a lot of questions lately. :( 1 Quote Link to comment
DAT510 Posted October 27, 2011 Report Share Posted October 27, 2011 um... Yeah. Get ready, shits gonna get serious up in here. Quote Link to comment
Guest 510kamikazifreak Posted October 27, 2011 Report Share Posted October 27, 2011 funky sound isnt it.. the first time I heard it was in the 80s :blink: Was in a 610 2dr dont want to know what happened to it :blink: :lol: :o Datsuns were a plentiful :blink: Quote Link to comment
izzo Posted October 27, 2011 Report Share Posted October 27, 2011 haha. Yeah, get ready for some work. you need to pull the timing cover off. It will be a lot easier outside the truck, than inside the engine bay. When/if you pull the motor, just replace the rear main seal, front crank seal, and of course the oil pan seal while your at it.. Then you won't have to worry about those later. Quote Link to comment
datzenmike Posted October 27, 2011 Report Share Posted October 27, 2011 Take the valve cover off and take a look with a flash light. Sheesh. :lol: Quote Link to comment
crackerjack69 Posted October 27, 2011 Report Share Posted October 27, 2011 Order tensioner, guides, a jap chain so you get the two bright links (unless you like counting), front crank seal, oil pan gasket, and timing cover gasket. I went with Beck Arnley, worked good. Pull the radiator, you'll gain plenty of work space. Wedge the ratchet against the frame and bump starter to get the crank pully bolt loose. Be sure to find TDC before anything. #1 cam lobes at 10 and 2 'oclock. Guess how I know all this? Yah, dropped the tensioner like a dummy while swapping cams. Of course, Bonzai510 made an excellent video on this, I'd watch it and it will be an easy job. Quote Link to comment
bananahamuck Posted October 27, 2011 Report Share Posted October 27, 2011 Seems like every time my chain tensioner has went out it makes noise till you are at 2000 RPMs. but yeah take the cam cover off and make sure it isn`t something else less intensive. Do you know how to look through hole to see if your chains stretched to much?? Quote Link to comment
Radiant-Designer Posted October 27, 2011 Report Share Posted October 27, 2011 Seems like every time my chain tensioner has went out it makes noise till you are at 2000 RPMs. but yeah take the cam cover off and make sure it isn`t something else less intensive. Do you know how to look through hole to see if your chains stretched to much?? well how about explaining this for others who may not.... or at least point to a resource on how to... think about all those ratsuners years later who may actually use the search function ;p Quote Link to comment
banzai510(hainz) Posted October 27, 2011 Report Share Posted October 27, 2011 ck for loose alternator bolts first, or anything that might be loose. trans bolts ect. then open up the valve cover and ck there. if a lower water housing bolt is too long soemtimes they can hit the right side(tight) of the timming chain guide. it catches the end. olddatsuns.com has my vid if you need to change a tensioner(really do a whole kit) You have a late model L20 and theys alot of crap to take off so youll be down for awhile and key is good tools . Esp on the later L20s the lower intake bolts and emission shit gets in the way Quote Link to comment
Ron1200 Posted October 27, 2011 Author Report Share Posted October 27, 2011 Thanks for the replies. I'll check and report back. For the record.... I have Skib's old truck. It has a L16 with a 260 cam. And no emission crap. :) Quote Link to comment
datzenmike Posted October 27, 2011 Report Share Posted October 27, 2011 Take the valve cover off and take a look with a flash light. Sheesh. :lol: Additionally: Does it do this when you are stopped and rev it up? If so have someone rev it while you look under the hood to locate where the sound is from. Check the fan and fan belt/pulley area. Is the alternator adjusting strap tight?Has a timing cover bolt loosened and rubbing the fan blade? Do you have an air pump? is the adjustment tight, belt loose, bolt loose? Has anything shifted or moved in contact with the exhaust pipe. Is the starter loose. Is the air filter on tight Quote Link to comment
datsunaholic Posted October 27, 2011 Report Share Posted October 27, 2011 Heck, make sure the water pump isn't wobbling all over the place. Grab the fan and rock it side to side. It shouldn't move. When mine have gone bad, the ones that failed GRADUALLY sounded like a rock grinder. Quote Link to comment
Ron1200 Posted October 30, 2011 Author Report Share Posted October 30, 2011 All good advice.. Reading between the lines... Check the simple things first. I took off the fan belt to isolate the water pump and alternator. When loosening the alternator I noticed that it was moving more than it should. Closer inspection reveled no bolt on the bottom bracket. I was able to lift it out once I got the top bolt removed. The only thing holding the alternator in place was the adjusting bracket, and it had a crack in it. :blink: I removed the alternator engine mount and drilled out the broken bolt. Decided to drill the hole completely through to the other side. I figured that a thru-bolt would be stronger. Also welded up the crack in the adjusting bracket. It's very solid now. Just need to hook-up the wires and go for a test drive. Quote Link to comment
Ron1200 Posted October 31, 2011 Author Report Share Posted October 31, 2011 Yup all is well... The solution was to repair the alternator supports. No more noise. I suspect the V-belt I had (the kind with the cut-out sections on the pulley side of the belt) was making the 'lets sound like a timing chain' racket. Quote Link to comment
Z-train Posted September 2, 2012 Report Share Posted September 2, 2012 Take all the belts off & start it.I just brought another 810 back to life and would have bet serious $$ that the chain was spent.So i ordered chain & the works.Turns out it was the water pump.Stupid shit FIRST!!!! Quote Link to comment
Skib Posted September 2, 2012 Report Share Posted September 2, 2012 you do realize no one has posted in this thread in almost a year....... Quote Link to comment
datzenmike Posted September 2, 2012 Report Share Posted September 2, 2012 Sunday morning eh? Bill. Go on.... have a coffee. Quote Link to comment
Z-train Posted September 2, 2012 Report Share Posted September 2, 2012 It showed up on my "New un-read" topics.I didn't go searching for this.And no- i didn't and won't read the date on everyone. Quote Link to comment
Skib Posted September 2, 2012 Report Share Posted September 2, 2012 please... think of the kittens. Quote Link to comment
Z-train Posted September 3, 2012 Report Share Posted September 3, 2012 I pick my cat up by the tail....... Quote Link to comment
Skib Posted September 3, 2012 Report Share Posted September 3, 2012 thats...... well thats just fuckin cruel. I hope he claws the shit out of you. 2 Quote Link to comment
Z-train Posted September 3, 2012 Report Share Posted September 3, 2012 He knows his place. Quote Link to comment
datzenmike Posted September 3, 2012 Report Share Posted September 3, 2012 I had a cat and did that too! He was used to it and would stretch when I did. Naturally I held it straight and didn't tug on it. He seemed to like it now and then. Quote Link to comment
Z-train Posted September 3, 2012 Report Share Posted September 3, 2012 Of course ,Mike.I grab the fleabag always at the base of the tail.He likes it also.He's strong enough to swing himself up and latch onto my arm and the battle is really on. Quote Link to comment
datzenmike Posted September 3, 2012 Report Share Posted September 3, 2012 He seemed to like it now and then. Now and then that is. Sometimes he thought we were playing and naturally, I brought fingernails to a cat claws fight. Quote Link to comment
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