Raising the engine by 10mm?

[adrianreeve]

Just discovered that my exhaust manifold touches the top chassis rail - grrrrrr! My choices are pie cut the manifold tubes near the flange and bend the whole thing up, or put 10mm spacers under the engine mounts to raise the front of the engine. Would this cause problems with the gearbox mount being permanently misaligned, and will the slight change of prop shaft output angle wear the pro shaft quickly?

Cheers

Adrian

[HandyAndy]

why not raise the gearbox mount by say 5mm on spacers ( obviously being aware of the bellhousing touching the chassis etc ) & as you say the engine mounts by 10mm, I would imagine the gearbox mount could cope with a 5mm variance ( happy to be told I,m wrong tho ).

The prop has U.J,s so they would cope with the very little misalignment I would've thought too.....tho I,m sure I've read somewhere that prop shaft U.J,s should be slightly misaligned from gearbox to diff flange to stop them doing something that isn't good for their service life expectancy.( can,t think of the technical term :o )

cheers
andy

[mgglep]

maybe something to consider is how the engine sat in the original car if this changes you may have issues with oil starvation to crank etc so if you jack the front up and leave the gbox mounts and the engine is ment to be level you may have problems

[twinturbo]

Fix the exhaust,

Better to have the engine lower for bonnet clearance.

TT

[robo]

Best to try and keep propshaft flanges parallel. When uj`s are phased/indexed + running parellel there is in theory no fore and aft motion on the slider into the gearbox . Get it wrong and you could get a mm or two of this motion on every turn of the prop. Imagine that spline going in and out at engine speed + overdrive. Its not hard to check, straight edge under the chassis, measure to crank centerline and the same at gearbox, then its just checking your running true down the centerline of the car.
3 degrees seem to be the norm.But parallel is important.

Bob


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