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74 Litre MPI 454 Cid engine

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paul_rodgers

Regular Contributor
"Need help on terminolgy (

"Need help on terminolgy (Seloc Book) I need help guys I don't understand this. It might be right or not? I am adjusting the pushrods and lifters yhe book said bring #1 Cyl to TDC done. Then tighten to 40 ft lbs done, then just the rest to 40 ft lbs, but the book does not indicate each cyl to be on top dead center? Where do they have to be to be adjusted? Thanks Paul"
 
It should indicate which ones

It should indicate which ones you can torque. When 1# is at TDC (valves closed) other cylinders have the valves closed as well and can be torqued at the same time. You will then need to rotate the crank until the next series of cylinders have the valves closed so you can torque them.
 
"When I was cleaning the riser

"When I was cleaning the risers I noticed alot of sand coming out, I know this is not normal but what kind of damage can this cause?? Thanks
All!!"
 
If you were just flushing them

If you were just flushing them out w/a hose then your OD impeller injested the sand in shallow water. There could be a heat issue if enough sand got in the right places to block part of the water flow.

If you were cleaning w/a rod or wire brush then it could just be mineral deposits.
 
"I am sure that is what happen

"I am sure that is what happened as we were parked on the island, Do you think that the sand damaged the raw water impeller, Thanks Paul"
 
"its worth checking - a water

"its worth checking - a water pump, now, is a lot cheaper than a tow on the water."
 
"Thanks, but am past that at t

"Thanks, but am past that at this point have disaaembled the engine down to block, going back now, have come accross a stumbling block!! While taking the pushrods out I didn't notice that the pushrods are two different sizes, one short and one long, I would appreciate anyones help with this. Is the exhaust short or long?? Help Please!
Thanks.."
 
"Paul:

Here's the text

"Paul:

Here's the text from the OEM manual:
Valve Adjustment
No adjustment is required. Valve lash is automatically set when rocker arm bolts are torqued to 45 lb. ft. (61 N·m).

Of note is that the spec table in the front of section 3 calls out 40 ft # for the 7.4L and 45 ft # for the 8.2L.

The exhaust pushrods are longer than the intakes. almost an inch if i remember.

In terms of the "old" method of rocker arm adjustments - place #1 At TDC, on the COMPRESSION stroke. Adjust EX on 1-3-4-8 and IN 1-2-5-7.
Rotatke crank one full revolution. adjust IN 3-4-6-8 and EX 2-5-6-7.

The recommended practice is to keep the valve train components "matched' and reassemble as such. You're past that point."
 
"Thanks that helps your the be

"Thanks that helps your the best!! I should have payed attention, but it was hot and I was piss__.
and just wanted to get it apart, and thanks for you guys I might get it back together. Am I correct in assuming that the exhaust is the larger of the two?? Thanks Paul"
 
The exhaust pushrods are [b]lo

The exhaust pushrods are longer than the intakes'.

I've never seen 3/8 and 7/16" diammeter rods mixed in one engine. Imagine its possible; I've just never seen it. The length is the key.

just look at the head - with the splayed valve design the long rod will have to go to the 'taller' valve.
 
"Sorry the diameters are the s

"Sorry the diameters are the same, the length is different by an inch.. Thanks Paul Didn't mean to be confusing!!"
 
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