some one help me time my 470 please

[bolo789]

hey guys just bought me a timing light. want to time my engin to the fullest. today i took a mechanic to check the timing on my 470, when he point the light to the damper it was 13 or 14 deg i told him it sopose to be 8 deg or i think 4 deg he tried to advance it to 8 deg but it could not. he said he has to pull the distributor and take of the valve cover to bring number one cilinder to dead center. my????is does he realy have to take off the valve cover to do that??<br /><br />if it sopose to be set at 4 deg how much the points must be set at. <br /><br />thanks ,. can some give me some step by step in doing this.<br /><br />thanks again

 

[jlshields]

Re: some one help me time my 470 please

Find another mechanic. You can find top dead center by looking at the front pulley. If the timing marks line up at zero it has to be top dead center either on comp stroke or exh stroke. You can tell the diff by looking at the dist rotor postiion in relation to the #1 plug wire.

 

[Trent]

Re: some one help me time my 470 please

Find another mechanic!!

 

[bolo789]

Re: some one help me time my 470 please

thanks guys. just spoke to a mechanic and he told me the same things you guys just told me. any way is it to set at 4 deg or 8 deg???

 

[Trent]

Re: some one help me time my 470 please

Its 8 degrees. Check this out for your info..... Tune Up Spec's

 

[bolo789]

Re: some one help me time my 470 please

thanks trent for the info, i just pick up a service manual and will be doing a lot of reading now.. the engine is running good but i have a lot of back preaSSURE WHAT COULD CAUSE THAT????

 

[Trent]

Re: some one help me time my 470 please

Explain what you mean by back pressure??

 

[wheels4]

Re: some one help me time my 470 please

Hold it.Your crank pulley(dampener) could be bad.Is it an elasto type pulley?(Is it a 2 piece with a rubber strap between them)?These go bad after time and the rubber dry rots causing the outer ring to slip.Giving you a false timing reading.You might have to pull valve cover for this reason to check the valve position.

 

[bolo789]

Re: some one help me time my 470 please

ok i was having oil blow by from one engine so i have it rebuild, from the mechanic put it back in , every time i take it out it blow up a coolant hose. lots of preassure is building up in them hose. any info. '<br /><br />thanks

 

[loadnet]

Re: some one help me time my 470 please

bolo...<br /><br />A bad thermostat can cause water hoses to blow.<br />They get stuck SHUT, causing no circulation thus the heat and pressure backs up till it goes caPUSH!

 

[bolo789]

Re: some one help me time my 470 please

ok i gess i will start with the thurmostat first.

 

[bolo789]

Re: some one help me time my 470 please

hi guys i change thurmostat today same thing all over again too much back pressure. it also cough and back fire when it get hot.took it out this morning ran fine at firt then it seems to lost power back fire and died restart but it has no power and thev rpm keep wandreing. key word no power. thanks again

 

[BRIAN03]

Re: some one help me time my 470 please

Check the riser gasket its sounds like your presureizing the coolant system. There are three different gaskets for the 224 inch engine. This engine doesnt have a two piece pulley on the crank shaft. Mercruiser call it a pulley and not a harmonic balancer. If your blowing out the coolant and not over heating the engine Its a pressure problem. Riser gasket or head gasket. Exhaust pressure in the coolant system.

 

[bolo789]

Re: some one help me time my 470 please

ok it seems we are getting close to solve this problem. first the risers only have three bolts instead of four one broke off in the manifold around the outer part of the risers it has leaky rust but i dont see any leak while the engine is running. finally how can i install a heat guage in the engine compartment so i can sure i am not over heating because i thing the guage on the pannel is not working right.

 

[rodbolt]

Re: some one help me time my 470 please

hello<br /> double check the water volume from the seawater pump to the heat excahnger. then check the volume from the hose from the heat excanger. the 2 should be close. if your riser is clogged it will cause the coolant to over heat as wellyou may try inspecting the heat excahnger for debris. if you have the cast iron manifold and its not craked I may know where a cheap riser is. otherwise if all the engine mechanical stuff checks out check the seawater side. all the water in has to go out as well and the flat riser liked to clog on that engine. good luck and keep posting

 

[bolo789]

Re: some one help me time my 470 please

thanks all you guys fo the good infos. went back to the boat this morning. did not do much but i notice the spark plug that goes to the back or the engine has no sparks, took of all 3 is sparking but the one at the rear is dead as duck.<br /><br /> what is happening to my 470 after this guy claim he rebuild the whole thing and charge me close to five grand.

 

[bolo789]

Re: some one help me time my 470 please

oh i almost fogot i put the shift in nutral and rev the engine it caunt go over 3000 rpm, if it does got there it just drop back down backfire and cut off.

 

[rattana]

Re: some one help me time my 470 please

Try a different sparkplug to see if it will spark. You can temporarily try one of the plugs you know is okay. If it still doesn't spark then check your sparkplug wire. You can use another sparkplug wire in place of the wire where you don't have any spark. Make a drawing between the distributor and the block so you don't mix up the position of the spark plug wires. Also look inside the distributor cap to see if there are any cracks, damage or corrosion inside the cap. Let us know what you find out.

 

[Salty Dog]

Re: some one help me time my 470 please

I have a brand new heat exchanger if you need it.<br /><br />Email me saltydog251@aol.com

 

[bolo789]

Re: some one help me time my 470 please

rattana i did all that you mention but still no sparks. if i rev it to say 3000 rpm it fall back down like a stone without me shifting the stick back to nutral.