So being an ol fart and trying to remember timing chain marks have searched the threads and now more confused than ever I have always set cam at 6 and crank at 12 however my 400 was put togeter 4 years ago and run once so Idecided to put new rear main in while it was out when I bring #1 up comp stroke bal points to 0 and marks are at 12-12 does anyone have a picture of the correct timing marks for a 70-400 my book so old pages for eng o/haul unreadable heeelp.
It is very possible that the difficulty starting when hot is the starter (solenoid) being overheated by close proximity to exhaust pipe and the fact that these engines do tend to run hot. Common problem with (US) Pontiac V8 engines. The advice I received when I had this problem was to either a) go with an external solenoid; b) replace the existing starter with an aftermarket 'mini' starter which will allow for more clearance; or c) install a heat shield between the starter and exhaust. This may or may not be what is causing your problem, but it's worth considering. Installing a timing chain and gear set on a 78 pontiac 400 engine. Block came with parts but was not assembled. Have seen info that says set cam gear at 12 o'clock/ crank at 12 0'clock. Check your owner's manual for the recommended mileage for replacing your timing chain. Replacement for a Ford Taurus is 100,000 miles. Locate the timing chain. Replace it if the automatic chain adjuster (also known as the tensioner) is damaged or worn. So the car ran fine at higher revs when the timing was bumped ahead? And now doesn't w/ it knocked back and vacuum advance isn't working for sure? Check your centrifugal advance isn't stuck in or out, change the vacuum advance and set your distrib. Just back from where you get the pinging of too much advance. Doubtful but best confirm there's no exhaust obstructions also that your timing chain hasn't jumped and/or has been installed off a tooth. Also look for the possibility of holes in the fuel line between the tank and pump and check to confirm your cam lobe is Ok. Sometimes it's good to use a temporary electric pump to isolate fuel pump problems. If no elec pump available, create a gravity feed to the carb from a container suspended higher than the carb. Make sure there's not an intake leak too.mist some methal hydrate out of an old Windex bottle around suspect areas at idle and listen for or have a helper watch a tach for any increase in revs. Be sure you keep a fire extingusher at hand w/ the above fuel test methods.or anytime! -- Edited by Ghost Post at 16:47, 2008-08-13 __________________. Ghost Post wrote: So the car ran fine at higher revs when the timing was bumped ahead? And now doesn't w/ it knocked back and vacuum advance isn't working for sure? The car ran good at 18 degrees,but was popping at higher rpm.Like it wasn't getting enough fuel.Low rpm to 3500 was fine.Also hard starting when hot. Update root certificates via wsus update. Now with it knocked back.It starts fine when hot.Seems to have alittle more horses at bottom end,but now starts craping at 2900 rpm. I got a guy to check my vacuum with a gauge.I soon as he would pump it up.It would drop just as fast. Sounds like you have more than one problem. I assume you are talking about initial timing (8&18 degrees)? Initial should be fine anywhere between 6-12. Total should be around 32-34. Whats the compression? Pontiac motors do not like the edelbrock carbs, the secondary flap does not open at the proper rate and are non adjustable in the Non-AVS carbs. As mentioned check all timing components for proper working order. Check fuel lines, pump, and filter. Born to be wild remix download. Make sure your timing works first then move on to the carb. Vacuum advance has nothing to do with power, its only for economy at cruise and can help at idle. I ran my 455 without vacuum advance for many years, i finally hooked it up to help with the idle due to a lumpier cam. -- Edited by BILTIT at 14:16, 2008-08-14 __________________. BILTIT wrote: Sounds like you have more than one problem. Sounds like it. I assume you are talking about initial timing (8&18 degrees)? Initial should be fine anywhere between 6-12. Total should be around 32-34. Yes on the intial timing from 18 to 8 degrees Whats the compression? The compression in 160 across the board.The heads are #15.The cam is unknown,but sounds lumpy.The intake is also Edelbrock. Pontiac motors do not like the edelbrock carbs, the secondary flap does not open at the proper rate and are non adjustable in the Non-AVS carbs. As mentioned check all timing components for proper working order. Check fuel lines, pump, and filter. Make sure your timing works first then move on to the carb. Vacuum advance has nothing to do with power, its only for economy at cruise and can help at idle. I ran my 455 without vacuum advance for many years, i finally hooked it up to help with the idle due to a lumpier cam. I thought the vacuum adavance works at the higher RPMs? -- Edited by BILTIT at 14:16, 2008-08-14 I'm changing the fuel lines from the pump to carb.As they are rubber lines.I,m changing to steel.Also the plastic filter to steel as well.A new vacuum advance as well tommorow.Take it for a run and then play with the timing.Hopefully this will work.If not I'll be going over the advice and start checking it off the list __________________. 1967 - 1971 Pontiac Firebird and Trans Am 350 and 400 Engine Kit Motor Gasket Set Fel-Pro Engine Kit Gasket Set for you 1967, 1968, 1969, 1970, or 1971 Pontiac Firebird 350 - 400 motor is now available. If your doing a engine overhaul this kit is a no-brainer. Order yours today and get the job done right the first time! 1 Year Limited Warranty Material: PermaTorque Pontiac Ram Air IV int & ext. Manifold gaskets NOT included Engine Specs: 6.6L 400 OHV V8 (Pontiac), 4.12' Bore 1967-1971 DETAILED DESCRIPTION Fel-Pro(R) gaskets offer 100% vehicle sealing with application-specific materials to give you sealing solutions with the performance and durability professionals trust. ADDITIONAL DETAILS. Pontiac 400 Timing ProblemsOur Price: $2 Firebird Timing Chain Cover, Original GM Used, 9790347 Real vintage timing cover for your 1968 Firebird. Fits all Pontiac V8 engine models. This cover will be in good usable condition. The one you will receive will look similar to the ones pictured. Above average with no major issues. Original GM part number stamped 9790347. Exact 0-6-12 timing cover. Pontiac 400 Timing Chain Installation GuideTrue 8 bolt 68 units are hard to find in any condition. Remember these are over 40 years old and made of aluminum. Hard to find in any condition. Part Number: ENC-2121G. Our Price: $1 - 1979 Firebird Timing Chain Cover, OE Style New timing chain cover for your Firebird and Trans Ams. Fits all Pontiac V8 engine models ( except 301 ). Highest quality die-cast aluminum. Although pdf was invented by Adobe, it is now maintained by the international organization for standardization and is used as an open standard now. The motto was made famous rightly so, because the three alphabets pdf actually changed not only people’s lives but also the way documents are created, shared and stored. Manual de blender 2 65 pdf to word. This means, that any user anywhere in the world can download, install and use the pdf format for all their documents. The creation of the pdf was more substantial than all other document formats and is the widely used format across the world. Pontiac 400 Timing Chain MarksExceptionally close tolerances held with latest machine tool technology. Eleven bolt water pump design. Surface quality exceeds NOS GM. Replaces original GM part # 527291 perfectly. Please note ~ Timing mark appearance is 70-79 style. Zero is still in the correct location for all 69-79 models. Part Number: ENC-2121.
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