Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 Ya valve seals won't hurt... would suck if they were leaking and they weren't done and you put it all back together... Don't know if I'd recommend power washing it.... might be easiest to bring it to the shop as it sits and let them deal with cleaning it... they can fully disassemble then clean properly... my shop had a hot tank to clean blocks and heads.... Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 And the gasket set ... you got the full kit with all the extra gasket... and it looks like they give you the valve stem seals so if you got them might as well put them in.... Quote Link to comment
datzenmike Posted May 10, 2017 Report Share Posted May 10, 2017 Well does it need rebuilding? If in good shape, maybe clean and throw new seals on it. A shop will just tell you it needs new everything and charge you if it needs it or not. A rebuild will be new seats (possibly new valves) and guides, valve seals, cleaning and I'm sure they will insist that it be milled flat. Just saying.. Quote Link to comment
d.p Posted May 10, 2017 Author Report Share Posted May 10, 2017 Idk think it does. Looks ok to me but I am shade tree at best. What the easiest way to get oil out the head? I can I just drop it in a bucket and let it drain out that way? Quote Link to comment
datzenmike Posted May 10, 2017 Report Share Posted May 10, 2017 If going to a shop let them hot tank it. 1 Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 Well hopefully you have a good shop to take it to that won't do what doesn't need to be done.... Quote Link to comment
datzenmike Posted May 10, 2017 Report Share Posted May 10, 2017 Better if YOU know what it needs and tell them. You can't do that with cars today or even yesterday but you can with old Datsuns. Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 True statement mike.... I like to know what I need but I don't tell them that... i let them tell me what they think needs to be done... then you know if there honest or full of shit... Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 I had an old boss that would make me do exactly what the customer asks for whether they were right or wrong about the fix... I tell him this isn't gonna fix the problem... he'd tell me the customer wants part "a" replaced so do it.. i would tell him but the problem is part "b"... he would respond I guess he'll be back for part "b" later.... i quit that place.. shady business... 1 Quote Link to comment
d.p Posted May 10, 2017 Author Report Share Posted May 10, 2017 Well I got no fucking idea beyond the gaskets so I guess I have to trust the dude. I got 0 Datsun enthusiast around me to Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 I hear that.... unfortunately its a 7 hr ride for me to stop over..... Does the shop have a good reputation? 1 Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 Maybe someday we can meet up.... I love to cruise a pair of 521..... Quote Link to comment
d.p Posted May 10, 2017 Author Report Share Posted May 10, 2017 Yeah they (he really) is considered the best around town. Man I wouldnt feel comfortable driving anywhere near that distance in my truck, too afraid it would break down and I would be stranded. :( I guess I am just accustomed to new super reliable cars. Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 Hell I was happy I drove 12miles on the dyno and didn't fail.... after all my time money and effort i put into mine I better make it to canby and home with out failing or I'll be pissed.... 1 Quote Link to comment
Crashtd420 Posted May 10, 2017 Report Share Posted May 10, 2017 And that good to hear about the shop. you should be fine.... one thing I never cheap out on is my machine shop... Funny side not.... the machine shop I use has no sign showing where they are located and they don't need it... word of mouth keeps them beyond busy. best in the state in my opinion.... Also doesn't hurt that they are located behind a porn shop.... everyone knows where that is.... all I have to do is say go around the back side (no pun intended) Quote Link to comment
d.p Posted May 12, 2017 Author Report Share Posted May 12, 2017 Dropped it off today 300 to inspect, clean, replace valve seals and mill it if needed. i asked to make sure the cam went back in the same spot as well as the rockers. He said he couldn't get the cam exactly where it was but will make it as close as possible. Quote Link to comment
datzenmike Posted May 13, 2017 Report Share Posted May 13, 2017 That's way too much for something you can do yourself. Valve seals are $3 bucks a piece and an hour to change them. Quote Link to comment
d.p Posted May 13, 2017 Author Report Share Posted May 13, 2017 I got valve seals in my gasket kit. How hard to change them? Quote Link to comment
datzenmike Posted May 13, 2017 Report Share Posted May 13, 2017 With the head off. Rent a valve compressor tool and take the valve spring off. Pry the old seals up and off the valve stem. Push the new one on. Put valve spring back on. Grease or oil them so they don't tear and start up dry. Do the next. 1 Quote Link to comment
Crashtd420 Posted May 13, 2017 Report Share Posted May 13, 2017 It is all pretty easy as mike stated .... just take your time and stay organized... the only real reason for the machine shop is if it needed to be milled flat or the valves seats needed attention .. but you never over heated or actually blew the head gasket... so chances are you should be ok.. The first valve is fun to figure out the spring compressor, but each one after that becomes easier.... If you wanna be thorough you can check for flatness with a straight edge and a feeler gauge.... And also I believes there's a way to check that the valves create a good seal... you could do this after you remove the cam and rockers. So all valves would be closed... Not sure what to use for a fluid but with the plugs in and the valves closed you should be able to fill up the combustion chamber with a fluid and see if anything leaks.... Quote Link to comment
d.p Posted May 13, 2017 Author Report Share Posted May 13, 2017 Cam has to come off to do the seals? More and more I am just leaning towards doing all this shit myself and just having them clean the head. 1 Quote Link to comment
Crashtd420 Posted May 13, 2017 Report Share Posted May 13, 2017 Yes cam and rockers, .. being your first time you just have a small learning curve but it's really not too bad... 1 Quote Link to comment
datzenmike Posted May 13, 2017 Report Share Posted May 13, 2017 You can clean the head yourself with a power washer. Even a car wash sprayer will work. This will remove the caked on grit. Take home an soak in a laundry tub with lots of detergent and HOT water or a pail and do half at a time. Get bristly scrub brushes. I cleaned a KA head by submerging in hot water and a can of Draino. Weak sodium hydroxide (lye) solution. Need gloves and goggles and don't leave in longer than needed to get it clean. Rinse thoroughly. Cam does not need to come out to remove the valve springs to replace the valve seals. With the springs out,, you can pop the valve out and inspect the face and seat. With a true straight edge placed across the head lengthwise in several places... if you can slip a 0.002" feeler gauge under it at any place... the head should be milled. 1 Quote Link to comment
Stoffregen Motorsports Posted May 14, 2017 Report Share Posted May 14, 2017 Cleaning is an art form. 1 Quote Link to comment
spdcrazy Posted May 15, 2017 Report Share Posted May 15, 2017 ^^^^^^ :rofl: and I am not artistically gifted Quote Link to comment
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